JPH0785330B2 - Playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a reproducing apparatus, and more particularly to a reproducing apparatus for reproducing information from a storage means in which a plurality of blocks are recorded.

<Prior Art> Conventionally, as a reproducing device for reproducing the information from a storage means recorded in each of a plurality of blocks as a reproducing device, a reproducing device for updating a block to be reproduced in response to an external trigger signal, Therefore, there is known a device for reproducing a block in which information to be printed on the printer is recorded and updating the block.

<Problems to be Solved by the Invention> By the way, in such a conventional apparatus, as a setting method for setting an operation mode for updating a block to be reproduced in synchronization with an external apparatus such as a printer which supplies a trigger signal, , Generally, a dedicated switch for designating such an operation mode is provided, but such a dedicated switch is unnecessary except when synchronizing with an external device, and for a reproducing device having a low frequency of reproducing in synchronization with the external device. There was a problem that there is still room for improvement in this setting method.

An object of the present invention is to solve the above-mentioned problems and to provide a new setting method.

<Means for Solving Problems> The present invention is a reproducing apparatus for reproducing information from a storage means in which information is recorded in a plurality of blocks in order to solve the above-mentioned conventional problems. Updating means for updating the block, setting means for setting an interval time when the updating means is driven in intervals, means for supplying an external trigger signal for operating the updating means from the outside, and the setting means. According to the aspect of the invention, there is provided a control unit that operates the updating unit according to the external trigger signal when the setting that disables the updating unit is performed.

<Operation> In the above configuration, when the inoperable setting is made as the interval time, the updating means operates according to the trigger signal.

<Embodiment> The present invention will be described in detail below with reference to the drawings. In the embodiment of the present invention described below, a still image video signal is applied to a disk-shaped recording medium, specifically a disk-shaped magnetic sheet. A recording / reproducing apparatus for recording or reproducing a recorded still image video signal will be described.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a magnetic sheet in which recording / reproducing tracks, track pitches, and tracks of a video signal are defined in advance, and the tracks are formed in concentric circles, and one track has one field of a video signal. In the case of the recorded frame video signal, a video signal of one field is recorded in two adjacent tracks to form a frame video signal. Reference numeral 2 is a DC motor for rotating the magnetic sheet 1 at a constant speed, 3-1 and 3-2 are in-line heads for accessing two adjacent tracks, and 3-1 is an outer peripheral side, 3
-2 accesses the inner circumference side. 4 is magnetic head 3-1,3
-2 to move the track -2 so as to access the track formed on the magnetic sheet 1, the magnetic head moving mechanism 4 causes the magnetic head 3-2 to access the innermost track on the magnetic sheet 1. At that time, the state switches from off to on, and the microcomputer (described below)
The innermost circumference detection switch for outputting an L level signal to the CPU 40, 6 is a reproduction amplifier for amplifying the signals detected by the magnetic heads 3-1 and 3-2, and 7 is a reproduction amplifier 6
A level detector for detecting the average value of the output signal from the comparator 8; a comparator 8 for detecting whether the output of the level detector 7 is higher than a threshold value set by a reference voltage source (not shown);
Is a demodulation circuit for demodulating the output signal of the reproduction amplifier 6, and 10 is 1 /
A 1 / 2H delay circuit that delays the output of the demodulation circuit 9 for two horizontal scanning periods (hereinafter referred to as 1 / 2H), 11 separates synchronization signals such as the horizontal synchronization signal Hsync and the vertical synchronization signal Vsync from the output of the demodulation circuit 9. Sync signal separation circuit, 12 is a sync signal separation circuit 11
Is a data demodulator that detects a predetermined data signal from the output of the reproduction amplifier 6 in accordance with the timing of the sync signal separated from the data signal and demodulates the data signal. The data signal is recorded in a frequency band lower than that of the video signal at a position having a predetermined relationship with the portion where the track synchronization signal is recorded. The reason why the demodulation circuit 9 and the data demodulation circuit 12 are provided separately is as follows. That is, the video signal recorded on the magnetic sheet 1 is FM-modulated, but the data signal other than the video signal adopts a DPSK modulation method (Defferatial Phase Shft Keying) different from FM modulation.
Therefore, the demodulation circuit 9 described above is an FM demodulation circuit, and the data demodulation circuit 12 is a DPSK demodulation circuit.

13 is a monitor for reproducing and observing video signals,
13 'is a printer connected to print the video signal. The printer 13 'is operated by the signal at the start signal input terminal becoming H level, and the busy signal output terminal is brought to L level during operation. Contrary to the data demodulation circuit 12, 14 is DPS for the data output from the CPU 40 described later.
Hsy that is a modulator that performs K modulation and that is separated from the video signal input from the video input terminal 18 by the sync signal separation circuit 17
The data modulated at the timing according to n and Vsync is output to the recording amplifier 16.

Reference numeral 15 is a recording amplifier which outputs a video signal input from the video signal input terminal 18 to the recording amplifier 16 after processing such as FM modulation necessary for recording. Reference numeral 19 is a reference signal generator, which generates an accurate reference pulse (60 Hz) for rotating the magnetic sheet 1.

Reference numeral 20 is a magnetic piece provided on the above-mentioned magnetic sheet 1, and is a DC signal synchronized with the reference signal generated by the reference signal generator 19 using a signal from the magnetic piece 20 as described later.
The rotation control of the motor 2 is performed. 21 is DC magnetic sheet 1
It is a PG coil for detecting a signal from the magnetic piece 20 when it is rotated by the motor 2.

Reference numeral 22 is a waveform shaping circuit that shapes the waveform of the signal output from the PG coil 21, and the output of the waveform shaping circuit 22 will be described later.
Input to the CPU 40 and the motor control circuit 23.

Reference numeral 23 denotes a control circuit for controlling the rotation of the DC motor 2, which outputs Vsync from the sync signal separation circuit 17 or the output signal of the reference signal generator 19 and the output of the waveform shaping circuit 22, that is, on the magnetic sheet 1. The rotation of the DC motor 2 is controlled so that the phase relationship with the signal from the magnetic piece provided on the DC motor 2 is in a predetermined relationship, for example, the phase of the two is always shifted by 7H. When the recording operation is performed by the magnetic heads 3-1 and 3-2, SW1 is switched to the synchronization signal separation circuit 17 side in advance, and Vsync and the signal input from the waveform shaping circuit 22, that is, the magnetic sheet. When the rotation of the DC motor 2 is controlled based on the signal from the magnetic piece 20 provided on the magnetic head 1 and the reproducing operation is performed by the magnetic heads 3-1 and 3-2, SW1 is the reference signal generator 19 Of the DC motor 2 based on the reference signal from the reference signal generator 19 and the signal input from the waveform shaping circuit 22, that is, the signal from the magnetic piece 20 provided on the magnetic sheet 1. The rotation is controlled.

23 'is a head 3- based on a signal from the CPU 40 described later.
It is a driver that drives a step motor 24 for controlling the positions of 1, 3-2, and the step motor 24 moves the heads 3-1, 3-2 via the head moving mechanism 4.

Reference numeral 25 'is a display circuit driven by a signal from the CPU 40. As a display element, as shown in FIG. 3 which will be described later, heads 3-1, 3-2 are accessing track NO and head 3-. Display the 7-segment display element that displays the feed speed of 1,3-2 by 2 digits, indicating that it is in playback mode
It is composed of a PB.LED and a REC.LED that indicates the recording mode.

26 is a ROM in which the program of the CPU 40 is stored, and 27 is a RAM in which the data of the CPU 40 is temporarily stored. 28 is a timer driven by the CPU 40, and 29 is a crystal oscillator that generates the reference clock of the CPU 40. Reference numeral 80 is a detection circuit connected to photo couplers 81 and 82 which form a detection switch for detecting whether or not the magnetic sheet 1 is inserted.

SW1 is a control circuit 30 driven based on a signal from the CPU 40
Is a switch whose state is switched by a signal from, the video signal is input from the video signal input terminal 18, the Hsync is output from the sync signal separation circuit 17, and the CPU is in the recording mode. When a signal indicating that is input, the synchronization signal separation circuit 17 and the motor control circuit 23 are connected, and Hsync is not output from the synchronization signal separation circuit 17, or a signal indicating that the playback mode is in operation is input from the CPU 40. When the reference signal generator 19 and the motor control circuit 23
And connect.

SW2 is a switch whose state is switched based on a signal from the CPU 40. The state in which the head 3-1 is connected to the recording amplifier 16, the state in which the head 3-1 is connected to the reproducing amplifier 6, and the recording amplifier 16,
It switches between an intermediate state in which it is not connected to any of the reproduction amplifiers 6.

SW3 is a switch whose state is switched based on a signal from the CPU 40 like SW2, and the head 3-2 is connected to the recording amplifier 16
, A state in which the reproducing amplifier 6 is connected, and an intermediate state in which neither the recording amplifier 16 nor the reproducing amplifier 6 is connected.

SW4 is in the state of being switched to the upper side in FIG. 1 when reproducing the video signal from the magnetic sheet 1 and when reproducing the frame video signal by using the heads 3-1 and 3-2 together, that is, in the demodulation circuit 9. When the field video signal is reproduced by using only the head 3-1 in the connected state, it is switched to the upper side and the lower side in FIG. 1, that is, connected to the demodulation circuit 9. The switch is driven by the CPU 40 so that the state and the state connected to the 1 / 2H delay circuit are alternately switched for each field.

SW5 is a switch driven by the CPU 40 so as to connect the monitor 13 to the video signal input terminal 18 during recording and connect the monitor 13 to SW4 during reproduction.

By the way, as described above, the video signal recorded on or reproduced from the magnetic sheet 1 may be a field video signal of only one field or a frame video signal composed of a pair of two fields. However, switching of the states of SW2, SW3, SW4, and SW5 in such a case will be described with reference to FIG.

FIG. 2 is a diagram showing combinations of switching states of SW2, SW3, SW4, and SW5.

In the field reproduction, SW2 connects the head 3-1 to the reproduction amplifier 6 and SW3 is in the intermediate state, that is, the head 3-2.
Is connected to neither the reproduction amplifier 6 nor the recording amplifier 16, and SW4 outputs the signal directly from the demodulation circuit 9 to the monitor 13 in the odd field and the 1 / 2H delay circuit in the even field.
The output is switched alternately for each field so that a signal is output to the monitor 13 via 10, and skew distortion is prevented.

Next, in frame reproduction, SW2 connects the head 3-1 to the reproduction amplifier 6 in the odd field, the intermediate state in the even field, the SW3 becomes the intermediate state in the odd field, and the head 3-2 in the even field. Connect to. Therefore, for each frame reproduction, one of the signals of the heads 3-1 and 3-2 is alternately output to the reproduction amplifier 6 for each field.

In this case, SW4 is switched to the upper side in FIG. 1, and the signal from the demodulation circuit 9 is directly output to the monitor 13.

In any of the above-mentioned field reproduction frame reproductions, SW5 is driven so that the monota 13 is connected to SW4.

Next, in the field recording, SW2 connects the head 3-1 to the recording app 16 and SW3 becomes the intermediate state.

Therefore, at the time of field recording, recording is performed by the head 3-1.

Further, in frame recording, SW2 connects the head 3-1 to the recording amplifier 16 in the odd field, the intermediate state in the even field, the SW3 becomes the intermediate state in the odd field, and the head 3-2 to the recording amplifier 16 in the even field. Connecting. In frame recording, head 3
The combination of 1,3-2 can be reversed.

Further, in both field recording and frame recording, the SW5 is switched so that the video signal to be recorded can be observed on the monitor 13 by connecting the monitor 13 to the video signal input terminal 18 during recording. In such a case, SW4 may be in any state.

Next, the switches 51 to 63 and 72 shown in FIG. 1 will be described.

In making such a description, the appearance of the apparatus of this embodiment shown in FIGS. 3 to 4 will also be described.

FIG. 3 is a front view of the device of this embodiment, and FIG. 4 is a front view of the remote control device used in the device of this embodiment.

Switches 51 to 63 and 72 shown in FIG. 1 are switch groups provided in the device shown in FIG. 3, switch groups provided in the remote control device shown in FIG. 4, and shown in FIG. Of the remote control device shown in FIG. 4 and the switch group provided in both of the remote control devices shown in FIG.
The same reference numerals are given in FIGS. The switch provided in the apparatus shown in FIG. 3, which is provided only in the remote control apparatus shown in FIG. 4 in FIG. 1, is connected to the CPU 40 through a line. Although shown for the sake of convenience, the signal generated by operating the switch provided only in the remote control device shown in FIG. 4 is converted into infrared light by the remote control device. Input is made to the CPU 40 of the device via a remote control light receiving unit 45 provided in the device of FIG.

It should be noted that various other modified examples of this embodiment can be considered as the method of arranging the switches 51 to 63 and 72, and the present invention is not limited to this embodiment.

1 to 4, 41 is a power switch, 42 is a slot for inserting the magnetic sheet 1, and an eject button when the magnetic sheet 1 is inserted in the slot 42.
When 43 is turned on, it automatically opens and the magnetic sheet 1 is ejected. 43 is the above-mentioned eject button, 44A, 44B
Are PB.LED, REC.LED described above, 45 is a remote control light receiving part that receives a signal from the remote control device shown in FIG. 4, 46 is an interval mode display LED that lights when interval playback is set, and 48 Is a display LED that indicates whether field playback or recording, frame playback or recording is set, and 25 is the 2-digit 7 described above.
The segment LEDs, 50A, 50B, and 50C are the program playback setting switch 58, interval time setting switch 57, and
This is an LED that displays the operating state of the program track setting switch 62.

Reference numeral 51 is a REC mode switch for setting the recording mode and confirming whether the track accessed by the head in the recording mode is already recorded or not.When the switch is turned on, the head is accessed. If the track being recorded is already recorded (when recording the field, the head 3
If the track that 1 is accessing has already been recorded, or if one of the tracks accessed by heads 3-1 and 3-2 has been recorded during frame recording, the REC.LED will blink and the head will be displayed. Indicates that the track being accessed is unrecordable, and if it is not recorded, the REC.LED lights up, indicating that recording is possible.

Reference numeral 52 denotes a REC switch that determines the timing for performing the recording operation, in the case where the recording mode is set by the REC mode setting switch 51, and when the switch 51 is turned on, recording is performed on the magnetic sheet 1. . If continuous recording is set in advance by the track feed speed setting switch 56, which will be described later, continuous recording is performed while the heads 3-1 and 3-2 are automatically shifted while the switch 51 is on. Be seen.

Reference numeral 53 is a PB mode setting switch for setting the reproduction mode, and when the switch 53 is turned on, the PB.LED indicating the reproduction mode is turned on.

Reference numeral 54 denotes a track UP switch. By operating the switch 54, the driver 23 'rotates the step motor 24, and the head moving mechanism 4 moves the heads 3-1 and 3-2 to move the heads 3-1 and 3-2. Shift 3-2,
The track being accessed by the head is changed more inward. If the track UP switch 54 is turned on when frame recording or reproduction is set by the field / frame setting switch 59 described later, the head 3-
1,3-2 are shifted by 2 tracks, 7 segment L
The ED25 also displays the 1-track number that is shifted by 2 tracks instead of the 1-track shifted track number. 1, 3-2 are shifted inward by one track, and the 7-segment LED 25 also displays the shift number shifted by one track.

When the recording mode is set and the heads 3-1 and 3-2 are shifted by operating the track UP switch 54, the tracks accessed by the heads 3-1 and 3-2 are recorded. If it has been completed, REC.LED44B displays a point reduction. The 55 is a head up 3-1 as opposed to the track UP switch 54.
It is a track DOWN switch for changing the access of 3-2 to the outer peripheral direction.

Similar to the track UP switch 54, the switch 55 is also used when frame recording or reproduction is set.
When 55 is operated, the track number shifted by 2 tracks is displayed on the 7-segment LED 25 instead of the track number shifted by 1 track. If field recording or playback is set, the switch is switched.
When 55 is operated, the track number shifted by one track is displayed.

Further, when the recording mode is set in advance similarly to the case of the track UP switch 54 described above, the head 3-1 and the head 3-1 are operated by operating the track DOWN switch 55.
If the track accessed when the 3-2 is shifted is already recorded, REC.RED44B blinks.

56 indicates whether to carry out such an operation when performing recording / reproducing automatically while continuously performing head-shifting, or switching to one-shot operation. When performing further continuously, how many operations per second are performed. This is a track feed speed setting switch for setting the indicated track feed speed.

Push the switch 56 once to turn it off,
The segment LED 25 displays the track feed speed instead of the track number, and in such a state the first
When the track feed speed setting switch 56 is turned on again within a predetermined time by the timer 28 shown in the figure, the 7-segment LED 25, for example, continuously records or reproduces two screens per second every time the switch 56 is turned on. Indicate to do Indicates continuous recording or playback of 5 screens per second Indicates that 10 screens are continuously recorded or played back per second. Indicates that recording or playback will be performed on a one-off basis Is displayed on the cycle. When the switch 56 is not turned on again after the track feed speed is displayed instead of the track number on the 7-segment LED 25 by turning on the switch 56 and then turning it off, when the timer 28 completes the measurement of the predetermined time. The LED 25 returns from the state where the track feed speed is displayed to the state where the normal track number is displayed.

Further, when the track feed speed is changed by the switch 56, when the frame video recording is set by the field / frame setting switch 59 and the REC mode setting switch 51 in advance, continuous recording of 10 screens per second is not set. .

57 is an interval time setting switch. That is, the interval time setting switch for setting the interval time of the track feed in the case of performing the continuous reproduction but the interval reproduction in which the reproduction interval time is relatively long or the program reproduction is set by the program track setting switch 58 described later. The interval time is set by the 10-key switch shown at 63 to 72 within 10 seconds after the switch is turned on.

When the switches other than the 10-key switches 62 to 71 are turned on after the interval time setting switch 57 is turned on, the interval time setting is automatically canceled. 58
Is a program reproduction setting switch for presetting the sequence of the reproduction tracks and setting a program reproduction mode in which the reproduction operation is continuously performed at the interval time intervals set by the interval time setting switch 57.

To specify the order of the reproduction tracks, first set the program reproduction mode by turning on the switch 58, and then by operating the track UP switch 54 and the track DOWN switch 55, the tracks accessed by the heads 3-1, 3-2 are selected. This is performed by reproducing the video of the desired track by changing it and checking it on the monitor 13 to turn on a program track setting switch 62, which will be described later, to store the track number confirmed on the monitor 13. 59
Is the above-mentioned field / frame setting switch, and the field recording or reproduction mode and the frame recording or reproduction mode are switched alternately every time the switch is turned on.

If the REC mode setting switch 51 and the track feed speed setting switch 56 are set to the continuous recording mode of 10 screens per second in advance and the frame recording is selected by the field / frame setting switch 59, the track is selected. The feed speed is automatically changed to the continuous recording mode with 5 screens per second.

That is, as compared to the field recording, the heads 3-1 and 3-2 must be shifted by 2 tracks at a time when the frame recording is performed.
A head shift of 20 tracks is required, but since such a high speed head shift is difficult, continuous recording of 10 frames per second is prohibited in this embodiment.

Reference numeral 60 denotes a start switch for performing interval continuous reproduction or program reproduction. When the start switch is turned on, when program reproduction is set, sequential reproduction is started from the first track and the interval time setting switch 57, Interval playback is started according to the interval time set by the numeric keypad switches 63 to 72, and program playback is started when program playback is set. Reference numeral 61 is a stop switch for stopping the reproduction operation started by the start switch 60, and when the switch 61 is turned on during the program reproduction, the track set at the beginning of the program is automatically reproduced. .

Reference numeral 62 is the above-mentioned program track setting switch.

Next, the operation of the embodiment of the present invention will be described with reference to the flowcharts of FIGS.

First, when the power switch 41 shown in FIG. 3 is pushed in, the power of the apparatus shown in FIG.

# 1: Then, the register IS which will be described later in FIG. 15 is reset to "0", the PB mode flag is set, the track feed speed is initialized to 2 screens per second, and the interval time is initialized to 3 seconds. Therefore, when the power is turned on, the continuous reproduction mode is automatically set in advance.

# 2: It is detected whether or not the jacket having the magnetic sheet 1 is pushed in. When the jacket is pushed in, the flow branches to # 3, and when it is not pushed in, the flow skips # 3 and branches to # 4.

# 3: In # 2, the DC motor 3 is driven when the jacket having the magnetic sheet 1 is pushed.

# 4: It is detected whether or not the heads 3-1 and 3-2 are accessing the 50th track by detecting whether or not the switch 5 shown in FIG. 1 is turned on, and the 50th track is detected. When the head is accessing, the flow branches to # 6, and when the head 3-1 is not accessing to the 50th track, the flow branches to # 5, and the step motor 24 shown in FIG. Drive the head 3-1 to repeat the loop of # 4 and # 5 so that the head 3-1 accesses the 50th track.

# 6: When the head 3-1 accesses the 50th track, the flow reaches this step, and the register N for accessing the memory (RAM27) is set to 5 at this step.
Set to 0.

# 7: In this step, it is detected whether or not the DC motor 2 is driven. When the jacket with the above-mentioned magnetic sheet 1 is inserted, the DC is executed by executing # 3.
Since the motor 2 is driving, the flow is this step # 8.
Proceed to and set the field flag. When the jacket is not inserted, the DC motor 2 is not driven because the flow proceeds without going through # 3. Therefore, the flow is # 2 to detect whether or not the jacket is inserted.
Return.

# 8: At # 7, the field flag is set when the DC motor 4 is driven. Therefore, the LED 44A indicating the field mode shown in FIG. 3 is turned on, and the display indicating the field is performed. That is, in this embodiment, the field mode is automatically set when the power is turned on and the jacket is inserted.

# 9: The output of the level detection circuit 7 shown in FIG. 1 is detected to determine whether the track being accessed by the head 3-1 is a recorded track. Here, since the track being accessed by the head 3-1 has already been recorded, when the output of the level detecting circuit 7 becomes H level, the flow proceeds to # 10 and the output of the level detecting circuit 7 becomes L level. If so, the flow proceeds to # 16.

First, # 16 will be described.

# 16: Set "0000" to N address of memory. Here, "0000" indicates that the track corresponding to the address of the memory is unrecorded.

Next, the flow from # 10 onward will be described.

Regarding # 10: # 9, when the output of the level detection circuit 7 is at H level, the signal recorded in the track is reproduced and the ID signal is fetched from the data demodulator 12.

# 11: The contents of the ID signal are detected to determine whether the video signal recorded in the track is a field video signal or a frame video signal. Here, if it is a field video signal, the flow proceeds to # 15, and if it is a frame video signal, the flow proceeds to # 12.

# 12: In this step, it is determined whether the video signal of the track being accessed by the head 3-1 is an inner track or an outer track of the frame video signal. If it is an inner track, the flow proceeds to # 14. If it is an outer track, the flow proceeds to # 13.

# 13: If the video signal of the track being accessed by the head 3-1 is a track outside the frame video signal, the N address of the memory is set to "0011". If you proceed from # 1 to this step for the first time, N is 50 in # 6.
Has been set up.

# 14: In case of the inner track of the frame video signal, the N address of the memory is set to "0010".

# 17: Here, when the head 3-1 is shifted to the first track and it is detected that N = 1, the flow proceeds to # 20, and when it is not N = 1, the flow proceeds to # 18.

# 18: When N = 1 is detected in # 17, the head 3-1 for one track is shifted to the outer peripheral side.

# 19: When the head 3-1 is even shifted to the outer peripheral side in # 18, N is subtracted from N.

# 20: When N = 1 is detected in # 17, that is, when the head 3-1 accesses the first track provided at the outermost circumference and the presence or absence of recording is set in the memory, the memory is stored here. When the data at the Nth address of the memory, that is, the first address in the memory is read and is “0011”, specifically, when the first track is the outer track of the two tracks constituting the frame video signal, go to # 21. The flow proceeds, and if not, the flow proceeds to # 23.

# 21: When it is detected in # 20 that the first track is a track outside the track forming the frame video signal, the flow proceeds to this step. In this step, when the data at the address N + 1 of the memory, that is, the data at the second address of the memory is read and is "0010", specifically, the second track is the inner track of the two tracks forming the frame video signal. Go to # 22.

# 22: The flow shifts to this step when the frame video signal is recorded in the two tracks of the first track and the second track. Therefore, the field flag set in # 8 is cleared and the field mode is changed to the frame mode. Therefore, the field frame display LED 48 shown in FIG. 3 is an LED indicating that it is in the frame mode.
Lights up.

# 23, # 24: The register N indicating the address of the above-mentioned memory is displayed on the 2-digit 7-segment LED 25 shown in FIGS.

With this display, the user can recognize the number of the track accessed by the head 3-1.

At the end of this flow, the jump to the flow shown in A is performed. The flowchart shown in FIG. 6 will be described below.

# A-1: Detects whether the REC mode setting switch 51 is turned on, and when the switch 51 is turned on, the flow calls a subroutine to set the recording mode, and when it is not turned on, #A. -2.

# A-2: It is detected whether or not the REC switch 57 is turned on, and when the switch 52 is turned on, a subroutine is called. When it is not turned on, the process proceeds to # A-3.

# A-3: It is detected whether or not the PB mode setting switch 53 is turned on, and when the switch 53 is turned on, a subroutine is called, and when it is not turned on, the process proceeds to # A-4.

# A-4: When the track UP switch 54 is turned on, the flow calls a subroutine, and when it is not turned on, the process proceeds to # A-5.

# A-5: When the track DOWN switch 55 is turned on, the flow calls a subroutine, and when it is not turned on, the flow proceeds to # A-6.

# A-6: When the track feed speed setting switch 56 is turned on, the flow calls a subroutine, and when it is not turned on, the flow proceeds to # A-7.

# A-7: When the interval time setting switch 57 is turned on, a subroutine is called. When it is not turned on, the process proceeds to # A-8.

# A-8: When the program setting switch 58 is turned on, a subroutine is called. When it is not turned on, the process proceeds to # A-9.

# A-9: When the program track setting switch 62 is turned on, a subroutine is called. When it is not turned on, the process proceeds to # A-10.

# A-10: A subroutine is called when the field frame setting switch 59 is turned on, and when it is not turned on, the process proceeds to # A-11.

# A-11: A subroutine is called when the start switch 60 is turned on and #A when it is not turned on.
Go to -12.

# A-12: Calls a subroutine when stop switch 61 is not turned on, and when it is not turned on #
Go to A-13.

# A-13: Jacket detection switch (detection circuit 8 in FIG. 1)
(Corresponding to 0) is turned on, the subroutine is jumped to, and when not turned on, the process proceeds to # A-14.

# A-14: The program reproduction mode flag and the program reproduction executing flag are cleared.

As described above, after the flow shown in FIG. 5 is executed to access the head 3-1 to the first track of the magnetic sheet, the head is jumped to the flow shown in FIG.
While detecting the state of each switch shown in FIG. 3, FIG. 3, and FIG. 4, the flow shown until the state of each switch is repeatedly executed, and the subroutine corresponding to the operated switch is called. .

The subroutine called when the track setting feed speed switch 56 is turned on will be described with reference to FIG.

FIG. 7 is a flow chart showing a subroutine executed when the switch 56 for changing the track setting feed speed is turned on.

# F-1 and # F-2: The set value of the track feed speed is read from the memory, and the set value is set in a track number display buffer (not shown).

Therefore, the 2-digit 7-segment LED 25 shown in FIG.
The track feed speed is displayed on. When the flow comes to this step for the first time, the track feed speed is displayed on the 2-digit 7-segment LED 25 shown in FIG. 3 every second at # 1. When the flow comes to this step for the first time, the track feed speed of 2 screens per second is set in # 1. Is displayed.

# F-3: When the track feed speed setting switch 56 is on, the flow repeats # F-3, and the switch 56
When is turned off, the flow moves to # F-4.

As described above, once the track feed speed setting switch 56 is turned on, the 2-digit 7-segment LED 25 shown in FIG. 3 is switched from the track number display to the track feed speed display, and then again. By turning on the switch 56, the track feed speed is switched. # F-
3 is provided so that the track feed speed is switched only when the switch 56 is once turned on, once turned off, and then turned on again. This is a step provided to cancel the setting of the track feed speed when the switch 56 or another switch is not turned on within a predetermined time (2 seconds) after switching to the speed display. . When the track feed speed setting switch 56 is turned on within a predetermined time (2 seconds) after the timer 1 starts counting, # F-7 to #F
When the flow advances to -10 and the timer 1 completes timing or when another switch is turned on, # F-6 to #F
The flow proceeds to -8.

# F-8: Clear the count value of timer 1.

# F-9: Contrary to # F-1, the display of the 2-digit 7-segment LED 25 shown in FIG. 3 is restored to the display of the track number.

# F-10: Clear the count value of timer 1.

# F-11: The track feed speed is set to a single value (once recorded or played back, it is head-shifted by one track in field mode and 2 in frame mode).
It is detected whether or not it is a head shift for the track and then stopped). If it is single, the flow proceeds to # F-12, and if it is not single, the flow proceeds to # F-13.

As described above, when the flow reaches this step after the power switch 41 is turned on, 2 screens per second are preset as the track feed speed in # 1.

# F-12: If the track feed speed setting is single, change the setting to 2 screens per second and return to # F-1.
The changed track feed speed is displayed and the above-mentioned #F is displayed.
-3 to # F-7 are executed.

# F-13: It is detected whether the track feed speed setting value is 2 screens per second, and if it is 2 screens per second, the flow proceeds to # F-14, and if it is not 2 screens per second, the flow proceeds to # F-15.

# F-14: The track feed speed set value is changed to 5 screens per second, the process returns to # F-1, the changed track feed speed is displayed, and the above # F-3 to # F-7 are executed.

# F-15: Detects whether the track feed speed setting value is 5 screens per second. If it is 5 screens per second, go to # F-16. If it is not 5 faces per second, that is, 10 screens per second is set. The flow proceeds to # F-17.

# F-16: It is determined whether or not the PB mode flag is set. If the PB mode flag is set, that is, if the reproduction mode is set, then go to # F-18. If the PB mode flag is reset, that is, if the recording mode is set, # F-19. The flow proceeds to.

# F-17: The track feed speed setting value is changed to single, the process returns to # F-1, the changed track feed speed is displayed, and the above # F-3 to # F-7 are executed.

# F-18: In the reproduction mode, field reproduction is performed regardless of whether the video signal recorded on the track of the magnetic sheet 1 is the field video signal or the frame video signal. Therefore, in such a case, the track feed speed setting value is changed to 10 screens per second, and the flow returns to # F-1.

# F-19: Detects whether the field flag has been set. If the field flag has been set,
That is, in the recording mode, a track feed of 10 screens per second is set, and in the field mode, the flow branches to # F-18.

If the field flag is not set, that is, if the track feed speed setting value of 10 screens per second is set in the recording mode and the frame mode is set, the flow advances to # F-17 to set the track feed speed setting value to single. Change to.

Therefore, in the above-mentioned subroutine, when the track feed speed setting switch 56 is turned on, the third
The track feed speed is displayed on the 2-digit 7-segment LED 25 shown in the figure, and the track feed speed is changed by turning on the switch 56 again within a predetermined time (2 seconds).

Further, there are three kinds of change ranges, that is, single, 2 screens per second, and 5 screens per second in the frame recording mode, and single, 2 screens per second, 5 screens per second in other than the frame recording mode.
There are 4 screens, 10 screens per second.

The change range is related to the track shift capability of the moving mechanism of the heads 3-1 and 3-2 shown in FIG. 1, and is set in advance to an appropriate range according to the track shift capability. is there.

Next, while executing the subroutine shown in FIG. 6 using FIG. 8, the track UP switch 54 and the track DOWN switch 54 are executed.
The subroutine called when the 55 is turned on will be described. First, the flow called when the track UP switch 54 is turned on will be described.

# D-1: When the flow reaches this step, head 3
-1 determines whether the track being accessed is the innermost track by detecting whether the register N is 50 or not.

As a result, if N is not 50, the flow proceeds to # D-2, and if N is 50, the flow proceeds to # D-34 described later.

# D-2: It is determined whether or not the PB mode flag is set. When the PB mode flag is set, that is, in the reproducing mode, the flow proceeds to # D-8. When the PB mode flag is not set, that is, in the recording mode, the flow proceeds to # D-3.

# D-3: N + 1 address of memory is "0000", that is, N + 1th
Whether or not the track is unrecorded is detected, and if it is not recorded, the flow branches to # D-4 if it has been recorded.

# D-4: The fact that the N + 1th track has not been recorded is #D
If it is determined in step -3, it is determined in this step whether or not the field flag is set, and if it is set, it goes to # D-6. If it is not set, it goes to # D-.
The flow proceeds to 5.

This step is reached when it is determined in # D-5: # D-4 that the field flag has not been set and the frame mode has been entered. In this step, it is detected whether or not the (N + 2) th content of the memory is "0000", and when it is "0000", that is, when the (N + 2) th track is unrecorded, the procedure goes to # D-6. , "0000", that is, when the N + 2th track has been recorded, the flow proceeds to # D-7.

By executing the steps # D-3 to # D-5, in the frame mode, if both consecutive two tracks are unrecorded, go to # D-6 and at least one of the consecutive two tracks. Has been recorded, # D-7
The flow proceeds to.

# D-6: The track being accessed by the head 3-1 in the field mode, the track being accessed by the head 3-1 in the frame mode, and one track more than the track and one track within the track. When the track accessed by the head 3-2 toward the circumference is unrecorded, that is, when the track is recordable, the flow reaches this step, and RE shown in FIG.
CLED44B lights up.

# D-7: Contrary to # D-6, when the tracks to be accessed and recorded by the heads 3-1 and 3-2 have already been recorded, the REC LED 44B shown in FIG. 3 is blinked. (Blinking)
By doing so, a warning is displayed so that the user can recognize that recording is not possible.

If the PB mode flag is set in # D-8: # D-2, the flow reaches this step and the field flag is set.

The meaning of this step is # D-9, # D-10, #D
= 13.

# D-9: Whether or not the track accessed by the head 3-1 is the track on the outer peripheral side of the two tracks constituting the frame video signal as the address N of the memory is "0011", that is, as explained in # 13. If it is the outer track of the two tracks, the flow proceeds to # D-10, and if it is not the outer track, the flow proceeds to # D-13.

# D-10: It is detected whether the address N + 1 of the memory is "0010", that is, whether the track accessed by the head 3-2 is the inner track among the two tracks forming the frame video signal, If the track is the inner track of the two tracks, go to # D-11. If it is not the outer track, # D-11.
The flow proceeds to -13.

That is, of the two tracks forming the frame video signal, the track on the inner circumference side is erased, or when a new video signal is recorded after the erase, the track accessed by the head 3-1 constitutes the frame video signal. Even if the track is on the outer peripheral side of the two tracks, the track accessed by the head 3-2 may not be the track on the inner peripheral side of the second track. Therefore, in this case, when the heads 3-1 and 3-2 are shifted to the inner peripheral side, it is necessary to shift only one track and reproduce the track in which a video signal is newly recorded after erasing. However, in such a case, if only one track of the heads 3-1 and 3-2 is shifted to the inner peripheral side, the heads 3-1 and 3-2 are
The frame video signal is not always recorded in the track that 3-2 is accessing, and there are cases where completely different field video signals are recorded in each. In this case, if the field flag is reset, there arises a problem that two separate field video signals are reproduced as frame video signals. Therefore, by providing the step # D-8 described above, in the present embodiment, when the head is shifted to the inner peripheral side, the field mode is set by setting the field flag in advance in the step, and the above-mentioned case is set. In the above, it is possible to solve the problem that a completely different field video signal is reproduced as a frame video signal.

# D-11; In this step, it is detected whether or not the register N is 49, and if N is 49, go to # D-13,
If N is not 49, the flow branches to # D-12.

# D-12; Heads 3-1 and 3-2 are accessing 2
When the form video signal is recorded in one track, the flow reaches this step. When such a record is made, when the track UP switch is turned on, the driver 23 is driven so as to shift the heads 3-1, 3-2 by one track at this step, and then # D-13.
In 1 further shifts one track head 3-1, 3-2. As described above, N is updated by 1 each time the heads 3-1 and 3-2 are shifted.

# D-13; Heads 3-1 and 3-2 are set to 1 in the same manner as # D-13.
Shift by the amount of track.

Similar to # D-14 and # 23, N is displayed on the 2-digit 7-segment LED 25 shown in FIG.

In this embodiment, since such a step is provided in the flow after # D-12 and # D-13, when the frame video signal is recorded in the track accessed by the heads 3-1 and 3-2. The track number displayed on LED25 will be updated by two, and the track number displayed on LED25 will be updated by one when the field image signal is recorded. It is possible to display whether the signal or the frame video signal is recorded.

Also, when this step is provided between # D-12 and # D-13, the frame video signal is recorded in the two tracks accessed by the heads 3-1 and 3-2. Even if it is, when the track UP switch 54 is turned on,
The track number displayed on LED25 will be updated one by one.

# D-15; It is determined whether or not the PB mode flag is set. If it is set, the flow branches to # D-16. If it is not set, the flow branches to # D-19.

# D-16: The address N of the memory is "0011". It is determined whether the track accessed by the head 3-1 is a track to the outer peripheral side among the tracks in which the frame video signal is recorded. Here, N corresponds to the number of the track that the head 3-1 is accessing after the heads 3-1 and 3-2 have already been moved as described above. If the content at address N of the memory is "0011", the flow branches to # D-17. If not "0011", the flow branches to # D-19.

# D-17: It is determined whether the contents of the address N + 1 of the memory is "0010", that is, whether the track accessed by the head 3-1 is the inner track of the two tracks in which the frame video signal is recorded.

If the N + 1 address of the memory is "0010", the flow goes to # D-18, and if it is not "0010", # D-19.
Branch to.

When the flow reaches this step through # D-18; # D-16 and # D-17, the frame video signal is transmitted to the two tracks that are being accessed after the heads 3-1 and 3-2 have moved. Since it has been recorded, the field flag set in # D-8 is cleared to enter the frame reproduction mode.

# D-19: In this step, it is judged whether or not the automatic track feed flag is set, and when it is set, the routine returns to # D-20, and when it is set, this subroutine returns (RTS ).

The automatic track feed flag is a flag that is set in a subroutine to be described later, in order to get out of this routine when calling a subroutine or later described while executing a program that repeats playback while automatically sending a track. It is provided in.

# D-20: Load the track feed speed setting value from memory.

# D-21: It is determined whether or not the track feed speed setting value is single, and in the case of single, the procedure is # D-34.
If not single, the flow branches to # D-22.

# D-22: It is judged whether or not the track feed speed setting value is two screens per second, and if it is two screens per second, # D-23.
If the screen is not 2 screens per second, the flow branches to # D-24.

# D-23: Set WAIT TIMER register in CPU 40 to 28.

# D-24; It is judged whether or not the track feed speed setting value is 5 screens per second, and if it is 5 screens per second, # D-25.
If not 5 screens per second, the flow branches to # D-26.

# D-25; Set WAIT TIMER register to 10.

# D-26; When 10 screens per second is set as the track feed speed setting value, the flow reaches this step and the WAIT TIMER register is set to 4.

WAIT set in # D-23, # D-25, and # D-26
The TIMER register is used to control the track feed speed. In # D-31 and # D-32 described later,
It is subtracted every time the magnetic sheet 1 makes one revolution by the DC motor 2.

# D-27; It is judged whether or not the REC execution flag is set, and when it is set, the flow branches to # D-28, and when it is not set, the flow branches to # D-31. REC here
The flag is a flag that is set in the subroutine. It is set when the subroutine is called during the execution of a program that repeats recording while automatically sending a track. # D-2 from the WAIT TIMER register
It is provided to save time corresponding to the time required for recording by subtracting 2 or 5 in 9, # D-30. That is, in the recording mode, the magnetic sheet 1
Is provided for detecting the rotation state of the PG coil 21 to determine the timing for recording a signal to be recorded from a predetermined position on the magnetic sheet, and for recording the signal on the magnetic sheet 1.

; It is determined by these three steps whether or not the field flag is set, and if it is set, WA is set.
Subtract 2 from the IT TIMER register, and subtract WAIT TIMER register or 5 if not set. Here, if 10 screens per second is set as the track feed speed, the WAIT TIMER register is set to 4, but since such setting is possible only in the field mode,
In this case, 5 is not subtracted from the WAIT TIMER register.

# D-31: It is detected whether or not there is a pulse from the reference signal generator 19 shown in FIG. 1, and if there is a pulse, # D-31.
If not branching to 32, the flow of # D-31 is repeated.

# D-32; 1 is subtracted from the contents of the WAIT TIMER register.

# D-33; It is determined whether or not the content of the WAIT TIMER register has become 0. If 0, the process branches to # D-34, and if not 0, the process branches to # D-31.

In the steps # D-32 to # D-33, the WAIT TIMER register and the reference signal generator 19 are used as the timer for controlling the track feed speed. Therefore, a stable and more accurate clock operation can be performed as compared with a method of forming a timer by subtracting the contents of the WAIT TIMER register according to the outlet of the waveform shaping circuit 22 that shapes the output of the PG coil 21. . That is, the output of the PG coil 21 may include an error due to a cause such as uneven rotation of the magnetic sheet 1, but the output of the reference signal generator 19 has substantially no error. When performing interval reproduction or recording, it is desirable to stop the rotation of the DC motor 2 during the interval time in order to save power consumption. When performing such an operation, the waveform shaping circuit 22
Although the interval time cannot be elapsed by the method of subtracting the WAIT TIMER register according to the output of, the method of the present embodiment can perform stable time counting operation even when such operation is performed. .

# D-34; It is judged whether or not the REC execution flag is set, and if it is set, the program that called the subroutine is returned (RTS). If it is not set, #D Branch to −35.

# D-35; It is determined whether the track UP switch 54 is on or not, and if it is on, the head 3
# D-1 to shift the track being accessed by 1 and 3-2 to the inner circumference side, and #D when it is off.
The flow branches to −36.

# D-36; It is determined whether or not the track DOWN switch 55 is on, and if it is on, the head 3-
To shift the track being accessed by 1 and 3-2 to the outer peripheral side, the routine returns to # E-1 of the subroutine, and when it is off, the program that called the subroutine is returned to.

Next, a subroutine executed when the track DOWN switch 55 is turned on will be described.

Since the steps # E-1 to # E-13 of the subroutine are the same as the steps # D-1 to # D-13 of the subroutine, detailed description thereof will be omitted.

However, since the subroutine shifts the track being accessed by the heads 3-1 and 3-2 to the outer peripheral side when the track DOWN switch 55 is turned on, for example, in # E-, it is detected whether N = 1. , # E-9, the memory (N-1) battery detects "0010", that is, whether the (N-1) th track is an inner track of the two tracks constituting the frame video signal, In -10, it is detected whether the memory (N-2) address is "0011", that is, the (N-2) th track is the outer track of the two tracks constituting the frame video signal, and # E- In 11 N =
It is detected whether or not it is 2, and in # E-12 and # E-13, the heads 3-1 and 3-2 for one track are shifted to the outer peripheral side.

Next, referring to FIG. 9, a field / frame switching switch
59, a subroutine called when the REC mode setting switch 51 is turned on will be described.

# J-1; the field / # A-10 shown in FIG.
When it is detected that the frame switching switch 59 is turned on, the flow advances to this step. In this step, if the field flag is set, #J
-2, the flow branches to # J-4 when not set.

When the field flag is set in # J-2; # J-1, the field flag is cleared in this step.

# J-3; It is judged whether the PB mode flag is set or not. When it is set, the flow branches to # J-8, and when it is not set, the flow branches to # J-5.

When it is detected that the field flag is not set in # J-4; # J-1, the field flag is set in this step.

When the PB mode is in the unset state, that is, the recording mode, and the field flag is cleared in # J-2, the frame recording mode is set. Can not. Therefore, when switching from the field mode to the frame mode in the subroutine, if the track feed speed of 10 screens per second is set as the track feed speed, it is necessary to prohibit such switching.

Therefore, according to this embodiment, # J-6,
When the track feed speed of 10 screens per second is set by J-7, the track feed speed setting value is automatically changed to the track feed of 5 screens per second.

# J-5: Load the track feed speed setting value into CPU40.

# J-6; If the track feed speed setting value fetched in # J-5 is 10 screens per second, go to # J-7.
If it is not 10 screens per second, the flow branches to # J-8.

# J-7; Change the track feed speed setting value to 5 screens per second.

# J-8: If the field / frame setting switch 51 is kept turned on, this step is repeated, and only when the field is turned off, the step shown as # A-1 in FIG. 6 is returned to.

Next, a subroutine called when the REC mode setting switch 51 is turned on will be described.

# B-1; When it is detected that the REC mode setting switch 51 is turned on in # A- shown in FIG. 6, the flow branches to this step, and the PB and LED44A shown in FIG. 3 are turned off. However, the PB mode flag is cleared.

These five steps are # D-3 shown in FIG. 8, respectively.
The description is omitted because it is similar to # D-7.

# B-6 '; This step is repeated while the REC mode setting switch 51 is kept on, and when the switch is turned off, the flow branches to # B-7.

# B-7; When the REC mode setting switch 51 is turned off, it is judged at this step whether or not the field flag is set. When the field flag is set, step # A-1 in FIG. 6 is executed. The flow returns to the step shown, and when the field flag is not set, the subroutine # J-5 is jumped to and the steps # J-6 to # J- are executed.
By executing step 8, when the track feed speed setting value is 10 screens per second, it is automatically corrected to 5 screens per second.
Therefore, when the REC mode is set by the REC mode setting switch 51 and the frame mode is set, the maximum track feed speed setting value is limited to 5 screens per second.

Next, a subroutine called when the PB mode setting switch 53 is turned on will be described with reference to FIG.

# C-1; When it is detected that the PB mode setting switch 53 is turned on in # A-3 shown in FIG. 6, the flow branches to this step and the field flag is once set. That is, the heads 3-1, 3-2 accessing 2
If different field video signals are recorded on two tracks, and the PB mode flag is cleared and the field flag is set, it is detected that the PB mode setting switch 53 is turned on. In order to prevent the separate field video signals from being interlaced and reproduced when the tracks accessed by the heads 3-1 and 3-2 are immediately reproduced,
In this step, the field flag is once set.

# C-2; It is detected whether the memory address is "0011", that is, the track accessed by the head 3-1 is the outer peripheral side of the two tracks in which the frame video signal is recorded. In some cases, the flow branches to # C-3, and when it is not “0011”, the flow branches to # C-5.

# C-3; Memory N + 1 is "0010", that is, head 3-2
It is detected whether the track being accessed is on the inner circumference side of the two tracks in which the frame video signal is recorded, and when it is "0010", it goes to # C-4 and when it is not "0010". The flow branches to # C-5.

Heads 3-1 and 3 in # C-4; # C-2 and # C-3
When it is detected that the frame video signal is recorded in the two tracks accessed by -2, the flow reaches this step, the field flag is cleared and the frame mode is set.

# C-5: The PB and LED 44A shown in FIG. 3 are turned on, the PB mode flag is set, and the reproducing operation is started.

# C-6; When the PB mode setting switch 53 is continuously turned on, this step is repeated, and when it is turned off, the process returns to # A-1 via # A-14 shown in FIG.

Next, the subroutine called when the interval time setting switch 57 is turned on will be described with reference to FIG. First, in such a subroutine, the timer T'is initialized to 0.

# G-1; When it is detected in FIG. 5 # A-7 that the interval time setting switch 57 is turned on, the timer T'is initialized to 0, and then the flow reaches this step. Further, the flow branches to # G-2 when the 10-key switches 63 to 72 are turned on, and to # G-3 when the 10-key switches 63 to 72 are not turned on.

# G-2: The interval time Ti is changed to the interval time Ti set by the 10 key switches 63 to 72.

# G-3; 10 key switch It is judged whether or not the switches other than 63 to 72 are turned on. When the switches are turned on, # G-
When it is not turned on to 4, the process branches to # G-5.

# G-4: It is detected whether or not the interval time setting switch 57 is turned on, and when it is turned on, # G-1 is turned on, and when it is not turned on, # A-1 shown in FIG. The flow branches to.

# G-5; The above-mentioned T'is incremented by 1 and # G- is incremented every 1 second.
The flow moves to 6.

# G-6; It is judged whether T'is 10 or not. If T'is 10, # A-1 shown in FIG. 6 is used. If T'is not 10, # G-1. Branch to # G-1, # G-3,
The loop of # G-5 and # G-6 is repeated, and when T ′ becomes 10, the process returns to # A-1.

Therefore, in the above-mentioned subroutine, when the other switches are not turned on within 10 seconds after the interval time setting switch 57 is turned on, # A-1 shown in FIG.
Return to and the interval time setting is canceled.

In such a subroutine, the interval time Ti
Is set to "0", an external trigger mode is set as the reproduction operation, which is described in the sub-routine and is operated when connecting to a printer, for example.

Next, with reference to FIG. 2, the sub-reach called when the REC switch is turned on will be described.

# N-; When it is detected that the REC switch 52 is turned on in # A-2 in FIG. 6, a flow arrives at this step, it is detected whether or not the PB mode flag is cleared, and it is cleared. If not, the flow returns to # A-14 shown in FIG. 6 because it is in the reproduction mode (RTS), and when cleared, the flow branches to # N-2. Therefore REC
If the mode is not set, recording will not be performed even if the REC switch 52 is turned on.

# N-2: It is determined whether the address N of the memory is "0000", that is, whether the track accessed by the head 3-1 is unrecorded. If not, it is shown in FIG. #A
The flow returns to -14, and if it is unrecorded, # N-3
The flow branches to.

# N-3: The flow branches to # N-5 when it is set by determining whether the field flag is set or not, and to # N-4 when it is not set.

# N-4; This step will be moved when the frame recording mode is set, but if the memory N + 1 address is "0000", that is, the track accessed by the head 3-2 is not recorded. If it is not unrecorded, the flow returns to # A-14 shown in FIG. In such a case, REC and LED44B are blinking in advance.

If such a track has not been recorded, # N-6
The flow branches to.

# N-5: A video signal for one field is sent to the track accessed by the head 3-1 on the magnetic sheet 1.
Recorded by -1.

# N-6; When the flow arrives at this step, the frame recording mode is set, so that the video signals for one field are sent to the two tracks on the magnetic sheet 1 for the head 3 respectively.
-1, 3-2 are recorded. Then, the step motor 24 is driven to shift the heads 3-1 and 3-2 to the inner circumference side by one track.

When executing # N-5 and # N-6, SW2 to SW5 are driven as described in FIG.

# N-7; REC execution flag is set.

# N-8; The subroutine is called and the head 3-1 is the first
# D-1 when accessing other than 50 tracks,
The flow moves from # D-2 to # D-3. Then # D-3
To # D-14 to execute one track for head 3
Move -1, 3-2. If it is the frame recording mode, the head # 3 is previously set to # N-6 and the head 3-
Since 1 and 3-2 have been moved, even in the frame recording mode, the head 3-1 accesses the track adjacent to the track recorded in # N-6. See also Head 3
When the tracks recorded by -1, 3-2 have been recorded, the REC and LED 44B shown in FIG. 3 blink and display a warning to the user.

Next, the flow branches from # D-15 to # D-19, and # D-
The flow shown in # D-20 to # D-34 is executed via 19.

That is, when the set value of the track feed speed is single, the flow branches from # D-21 to # D-34 and returns to # N-9 according to the REC execution flag set in # N-7 in advance. .

If 2 or 5 screens are set per second, # D-28
The WAIT TIMER register is subtracted only for the time required to record at, and the WAIT TIMER register is down-counted to WA.
When the IT TIMER register becomes 0, the flow returns from # D-33 through # D-34 to # N-9 according to the REC execution flag set in # N-7 as described above.

# N-9: Clear the REC execution flag.

# N-10: This step is the same as # D-20, and the set value of the track feed speed is fetched from the memory.

# N-11: If the set value of the track feed speed is single, then go to # N-12. If not, return to # A-14 shown in FIG.

# N-12: When the track feed speed is set to single, as long as the REC switch 52 is turned on, this step is repeated and the subroutine is executed again so that recording is not performed.

When the track feed speed is set to other than single and the REC switch 52 is turned on, the subroutines are called from # A-1 and # A-2 via # N-11 to # A-14. Flow is executed REC switch 52
As long as is on, recording will continue at the set track feed speed. If the REC switch 52 is turned off, the flow is from # N-12 to # A-14, # A-1, # A-2.
However, the continuous recording is ended without calling the subroutine in # A-2.

Next, the subroutine called when the program setting switch 58 is turned on will be described with reference to FIG.

# H-1; When it is detected that the program setting switch 58 is turned on in # A-8 in FIG. 6, this step is reached and it is judged whether or not the PB mode flag is set. If it is set, the process returns to # H-2, and if it is not set, the process returns to # A-1 shown in FIG. 6 (RTS).
This step is provided to prohibit program setting in the recording mode. That is, in this embodiment, when the program is set, the reproduction mode is selected in advance so that the program is set while confirming the image recorded on the magnetic sheet 1 on the monitor, for example.

Further, by automatically setting the PB mode flag when the program setting switch 58 is turned on, it is possible to automatically perform the operation to the reproduction mode. In this case, a step similar to the step shown in # C-5 is performed as # H-1.
It should not be provided instead of.

# H-2: When the program is reproduced in the program track memory shown in FIG. 14 in which the program is stored, the I register indicating the address where the track number to be reproduced next is stored is set to 0.

# H-3: The program reproduction mode flag indicating the program reproduction mode is set and the process returns to # A-1.

Next, a subroutine called when the program track setting switch 62 is turned on after the program reproduction mode is set by the subroutine will be described with reference to FIG.

# I-1: It is judged whether or not the program reproduction mode flag is set, and when it is set, the flow branches to # I-2, and when it is not set, the flow branches to # A-1.
Therefore, when the program reproduction mode is not set by the program setting switch 58, the program setting operation is not performed even if the program track setting switch 62 is turned on.

# I-2; register S (# indicating the start address where the program of the program track memory is stored
1 is initialized to S = 0 when the power is turned on (1) and the same content is written in the register M.

# I-3: The data in the program track memory at the address stored in the register M is stored at an address which is larger by 1 than the address. In other words, the data indicating the track number stored in the program track memory is stored at an address which is larger by 1 than the address where the data is stored.

# I-4: The value obtained by adding 1 to the content of the register M is written in the register I.

# I-5: Subtract 1 from the contents of register M.

# I-6; It is determined whether or not the content of the register M is 0. If it is 0, the flow branches to # I-7, and if it is not 0, the flow branches to # I-3.

The flow of # i-3 to # I-6 is repeated, and when the content of the register M becomes 0, all the data stored in each address of the program track memory is transferred to the address which is larger by 1. Therefore, when this flow is repeatedly executed and the flow branches from # I-6 to # I-7, no data is stored at address 1 of the program track memory.

# I-7: The number of the track accessed by the head 3-1 is stored in the program track memory address 1. Therefore, the program track setting switch
When the switch 62 is turned on, the head 3-1 accesses and the track number of the recorded track of the image being reproduced is programmed.

# I-8; 1 is added to the contents of the register S. By executing this step, # I-3 ...
The head address (largest address) where the data of the program track memory moved by executing the flow of # I-6 is stored.

# I-9: If the program track setting switch 62 is on, this step is repeated, and if it is off, the process returns to # A-1.

When the user further sets the program, the track UP switch 54 or the track DOWN switch 55 is turned on to change the track being accessed by the heads 3-1 and 3-2, and the desired track is changed. The program can be set by turning on the program setting switch 62 while checking the reproduced image at the place where the program is reproduced.

Each time the program setting switch 62 is turned on, the data stored in each address of the program track memory shown in FIG. 14 is stored in a larger address by one. Also, during program setting, register S,
The register I has the same contents.

Next, the program setting switch 58, the program setting for reproducing the program set by turning on the program track setting switch 62, and the recorded track are sequentially selected from the track accessed by the head 3-1. About the program that is executed when performing interval playback that is played by
It will be described with reference to FIG.

First, the subroutine 20 that is called when the start switch 60 is turned on will be described with reference to FIG.

# K-1; When it is detected that the start switch 60 is turned on in # A-11 in FIG. 6, a flow comes to this step and it is detected whether or not the PB mode flag is set. If the mode flag is not set #
When the PB mode flag is set in A-1, #
The flow branches to K-2. Therefore, in the present embodiment, if the reproduction mode is not set in advance, the interval reproduction and the program reproduction cannot be performed. Therefore, even if the start switch 60 is mistakenly turned on in the recording mode, the interval reproduction and the program reproduction are not performed. It can be prevented from being started. # Instead of # K-1
If a step similar to that shown in C-5 is provided, the interval reproduction program reproduction can be started immediately by turning on the start switch 60 without setting the reproduction mode in advance.

# K-2: It is judged whether or not the program reproduction mode flag is set. When it is set, the flow branches to # K-3 when it is not set.
Here, a flow when the program reproduction mode flag is not set, that is, when the interval reproduction is performed will be described.

# K-4; N address of memory is "0000", that is, head 3-
It is determined whether or not the track being accessed by No. 1 is unrecorded. If not recorded, # K-6 If not recorded, #K
The flow branches to -5. Here, first, head 3-1
#K because the track being accessed is unrecorded
-6 The following flow will be described.

According to the present embodiment described below, in the interval reproduction, if the track accessed by the head 3-1 is other than the 49th or 50th track, the head 3 is transferred from the track.
When the track accessed by -1 is the 49th or 50th track, only the tracks that have been recorded sequentially from the first track are reproduced, but between # K-2 and # K-4. If the head 3-1 is inserted with a step for driving the step motor 24 so as to access the first track, only the recorded tracks are reproduced sequentially from the first track.

Therefore, when the head 3-1 is not accessing the first track but is accessing another track, it is very effective to automatically perform interval reproduction from the first track and perform a search. .

# K-6; The automatic track feed flag indicating that interval reproduction is in progress is set.

# K-7: It is judged whether or not the field flag is set, and when it is set, the flow branches to # K-9 when it is set to # K-8.

# K-8; Whether the track being accessed by the head 3-1 is the innermost track or not is discriminated by detecting whether N is 50 or not, and it is detected that it is 50. In this case, the flow branches to # K-10, and when it is not detected as 50, the flow branches to # K-11.

# K-9; It is judged whether or not the track being accessed by the head 3-1 is a track outside by 1 from the innermost circumference by detecting whether N is 49 or not, and 49 is detected. If it is not detected that it is 48 to # K-10, the flow branches to # K-11.

# K-10; In this step, the interval time Ti set by executing the subroutine is "0".
Or not. As will be described later, when the interval time Ti is "0", it means a mode in which the head 3-1 is shifted by a program preset according to an external trigger signal, and the interval time Ti is " When set to 0 ", the flow is # A-1
When it is not set to "0", the flow branches to # K-12.

# H-11: Call a subroutine, # D-1 to #D
The flow shown in -18 is executed. Since the PB mode flag is set when the subroutine is called in the subroutine, the flow is from # D-2 to # D-9.
And the track on the inner side of the track that is accessed by the head 3-1 at # K-4 is the track on the inner side of the track that records the frame video signal, and the head 3-1 is the first track. When it is determined that 49 tracks are not being accessed, the heads 3-1 and 3-2 are # D-12 and #.
When it is not discriminated by shifting to the inner circumference side by 2 tracks by D-13, only one track is moved by # D-13.
1, 3-2 are shifted to the inner circumference side. Also head 3-
If the frame video signal is recorded in the track 1 or 3-2 being accessed, the field flag is cleared and the flow moves from # D-19 to # K-14.

# K-12; Calls a subroutine # E-1 to # E-1
3 and the flow shown in # D-14 to # D-19 is executed,
If the frame video signal is recorded in two tracks, the outer track adjacent to the track accessed by the head 3-1 in # K-4 and the other track located on the outer track, the head 3-1 is recorded. 3-2 is # E-12, # E-13
Is shifted to the outer peripheral side by 2 tracks, and otherwise, only one track is shifted to the outer peripheral side by # E-13.

Also, like # K-11, the field flag is cleared in the tracks accessed by 3-1 and 3-2, and the flow is
Move from # D-19 to # K-13.

# K-13: Whether or not the track being accessed by the head 3-1 is the outermost track is determined by detecting whether or not the content of the register N is 1, and it is detected that it is 1. When it is detected, the flow branches to # K-14, and when 1 is not detected, the flow branches to # K-12. Therefore, when the flow branches to # K-12 in # K-8 or # K-9, that is, when the head 3-1 is accessing the 49th track or the 50th track, # K-12, #
By repeating the steps of K-13, the head 3-1
Are controlled to access the first track.

# K-14: Clear the automatic track feed flag.

As described above, when the flow of # K-4 to # K-14 is executed and the flow branches from # K-4 to # K-5, the head 3-1 is the track on which the video signal is recorded. Is accessed, and a track in which no video signal is recorded is skipped without being substantially reproduced.

Further, by executing the flow of # K-4 to # K-14, when the flow branches from # K-4 to # K-5, the head 3
When the frame video signal is recorded in the two tracks accessed by -1, 3-2, the field reproduction mode is automatically set because the field flag is cleared in # D-18. . Also, head 3-1,
The field reproduction mode is automatically set when the field video signal is recorded in the track 3-2 being accessed. Therefore, during interval reproduction, the most appropriate reproduction mode is automatically set according to the recording method of the video signal.

# K-5; The interval time Ti set in the subroutine is fetched from the memory by the CPU 40.

# K-15; The interval time Ti is "0" as in # K-10.
If it is “0”, the flow branches to # K-17, and if it is not “0”, the flow branches to # K-16. Here, it is assumed that the external trigger mode is not set. −16
The following description will be given.

# K-16: The timer 1 starts counting time and proceeds to # K-18.

# K-18: It is detected whether or not the timer 1 has timed for one second, and the flow branches to # K-19 when it is timed and to # K-20 when it is being timed.

# K-20: It is detected whether or not the stop switch 61 is turned on, and when it is turned on, the flow branches to # A-1 and when it is not turned on, the flow branches to # K-21. When the flow branches to # A-1, the steps # A-1 to # A-12 are executed again. Therefore, when the stop switch 61 is turned on in the normal state, the flow is # A-12. Will call the subroutine from. The subroutine will be described below with reference to FIG.

# M-1: It is detected whether or not the program reproduction mode flag is set, and if it is not set, # A-14.
If it has been set, the # M-12 flow branches.

# M-2: It is detected whether the program reproduction execution flag is set or not, and if it is set, the flow branches to # M-3, and if not set, the flow branches to # M-4.

# M-3: The contents of register I are made the same as the contents of register S.

# M-4: The register S is set to 0, and then # M-3 is executed.

This subroutine will be described in more detail in the program reproduction mode. The steps from # K-21 onward will be described in detail below.

# K-21; It is detected whether the track UP switch 54 is on, and when it is detected that it is on, a subroutine is called and the heads 3-1 and 3-2 are shifted to the inner peripheral side and turned on. If it is not detected, the flow branches to # K-22.

# K-22: It is detected whether the track DOWN switch 55 is on, and when it is detected that it is on, a subroutine is called, and the heads 3-1 and 3-2 are shifted to the outer peripheral side and turned on. When it is not detected, the flow branches to # K-16.

# K-19; 1 is subtracted from Ti.

# K-23; The flow branches to # K-24 when Ti is "0", and to # K-16 when Ti is not "0".

Therefore, by executing the above # K-15 to # K-23, the track UP switch 5 is activated during the interval reproduction.
4. By turning on the track DOWN switch 55, it is possible to reproduce the image recorded on the track adjacent to the track being reproduced. In that case, by continuing to turn on the switch 54 or the switch 55, it is possible to automatically and sequentially update the tracks being played back in accordance with the track feed speed set in the subroutine. You can also easily play the video.

Also, track UP switch 54, track DOWN switch 55
When the video recorded on the track adjacent to the track being played by turning on the switch is turned on, in this embodiment, the interval time Ti of the track being played before the switches 54 and 55 are turned on. When the remaining time is reproduced, the flow is from # K-23 to #K.
It moved to −24 and was updated to the reproduction of a new track,
As shown by the dotted line in the figure, if the flow is jumped to # K-5, the interval time Ti can be reset and the image updated by the switches 54 and 55 can be surely observed for a certain time. I can.

# K-24; It is detected whether the program reproduction mode is set when updating the track to be reproduced after the end of the interval time Ti, and when it is set, #
The flow branches to K-3, and to # K-6 when not set.

Next, the subroutine called when the program reproduction mode flag is set in # K-2 will be described with reference to FIG.

# O-1; It is detected whether or not the content of the register S is “0”, and when “0” is detected, # K-5 is detected. The flow branches to O-2. As described above, the register S stores the start address of the program in the program track memory, and the content of the register S is "0" when the program is not stored in the program track memory. Therefore, when it is "0", the process branches to # K-5.

# O-2; It is detected whether or not the content of the register I is "0", and if "0" is detected, go to # O-3. If it is detected that it is not "0", The flow branches to # O-3.

As described above, the register I stores the address of the track memory in which the track number to be reproduced next is stored when the program reproduction is executed. When the program reproduction is executed, it is also shown in # O-14 described later. Every time one step program reproduction is executed, 1 is subtracted. Therefore, the flow branches to # O-2, and the register I is detected as "0" because the program is set, the register S is not "0", and the program reproduction step is executed once. It shows that. In other words, when the program playback is executed normally, #O
-3, the flow branches to # O-5 while the program reproduction is generally executed.

# O-3: The interval time Ti set in the sub-routine is taken in and it is detected whether the interval time Ti is "0".
Returning to A-1, the program reproducing operation is ended.

Therefore, in the external trigger mode set by setting the interval time to "0", the program reproduction operation is stopped when the program reproduction is executed once.

Further, the flow moves to # O-4 during normal program reproduction when the interval time Ti is set to a value other than "0".

# O-4: Write the contents of register S to register I.

The program operation is started again.

# O-5: Data (I) of the address of the program track memory set in the register I (the data written in the address set in the register I of the program track memory is shown with a cut attached to I) read out.

# O-6; The data (I) is subtracted from N indicating the track number currently accessed by the head 3-1. If it is less than "0", go to # O-7. If it is less, go to # O-8. The flow branches.

# O-7: The field flag is set. This set is for prohibiting head feed which is the frame mode as in # O-8.

# O-8: Heads 3-1 and 3-2 are shifted in the outer peripheral direction by one track.

# O-9: It is detected whether the data (I) is equal from N indicating the track number being accessed by the head 3-1. If they are equal, the data (I) is not equal to # O-10, that is, the data is more than N indicating the track number. If (I) is larger #
The flow branches to O-11.

# O-10: Heads 3-1 and 3-2 are shifted inward by one track.

; Steps similar to # D-16, # D-17, # D-18, and automatic frame reproduction and field reproduction depending on whether the video signal recorded by such a step is a frame video signal or a field video signal Is done.

By repeating # O-6 to # O-10, the head 3-
1 is controlled to access the track being programmed into the program track memory.

# O-14: 1 is subtracted from the register I. By this step, the flow can be branched by determining whether or not the program reproduction mode flag is set at # K-24.

# O-15; The program reproduction in-execution flag is set.

Therefore, when the subroutine is called in # K-2, it is first determined whether or not the reproduction program is actually set, further it is determined whether or not the printer mode is set, and the external trigger mode is set. In that case, the program is executed only once, and in other cases, the program is repeatedly played.

Next, the flow when the external trigger mode is set will be described. When the external trigger mode is set, the flow branches from # K-15 to # K-17.

# K-17 '; It is detected whether or not the printer connected as an external device is busy (printing operation is being executed). If it is busy, it is # A-1. If it is not busy, # K- The flow branches to 18.

# K-18 '; A print start signal is sent to the printer as an external device. The print start signal is executed by setting the signal level of the terminal connected to the printer to H level.

# K-19 '; wait 150 msec. # K-20'; When the printer is busy, the flow branches to # K-21, and when it is not busy, the flow branches to # K-24.

# K-21 ': It is detected whether or not the stop switch 61 is turned on, and when it is not turned on, the flow returns to # K-20, and when it is turned on, the flow returns to # A-1.

If the printer connected as the external device is busy when executing the above # K-17 'to # K-21', the flow returns to # A-1 as described above, and another switch is restarted. The flow shown in FIG. 6 is repeated until it is turned on. If the start switch 60 is turned on again while repeating the flow shown in FIG. 6, the above-mentioned flow is repeated and # K-17 'is executed again.

When the printer is not connected as an external device, the terminal for inputting the signal from the busy signal output terminal of the printer B'shown in FIG. 1 at # K-17 'is opened to the H level. Therefore, if the printer or other device is not connected even though the external trigger mode is set, the tracks accessed by the heads 3-1 and 3-2 continue to be reproduced, and the tracks being reproduced are reproduced. Is not updated.

Also, if a printer is connected as an external device and the printer is not busy, then # K-17 'to # K-18'
If the flow has proceeded to step 1, the printer operation is started after sending a print start signal to the printer and waiting for 150 mspc shown in # K-19. , # K-20 and # K-21 are repeated until the stop switch 60 is turned on. When the printer operation is completed, the flow is #K.
It branches from -20 'to # K-24, and it is determined whether the program reproduction is set by detecting whether the program reproduction mode flag is set. If program playback is set here, the flow is the above #
If the program reproduction is not set, the process branches to K-3. Further, when the stop switch 60 is turned on, it is as described in the above flow.

If the external trigger mode is selected while the program reproduction is set, the program reproduction operation is stopped when the program reproduction is executed once as described in # O-3.

Further, according to the present embodiment, even when the external trigger mode is selected and the program reproduction is not set, the head # 3-1 is provided because the # K-10 is provided.
When the reproduction from the accessed track to the final track in 3-2 is sequentially performed, the reproduction operation is stopped.

Therefore, in the external trigger mode, the printer is used as an external trigger device because the playback operation is stopped after the normal playback is performed regardless of whether the program playback is set or not. When is used, only one printing is performed.

On the contrary, when the program is not set to the external trigger mode and the program is set to play, even if the program is not set to play, the playback is performed from the beginning again after the playback is performed in the predetermined order. Is done. Therefore, when the reproducing apparatus is used in a mode other than the external trigger mode, so-called endless reproduction can be performed because the reproduction is repeated in a predetermined order.

Further, although the printer is shown as the external trigger device in the present embodiment, for example, a device having an electric transmission function may be used, or another device may be used as long as it is a device that processes a reproduced signal.

As described above, according to this embodiment, the external trigger mode can be automatically set by setting the interval time during program playback or interval playback to "0". The effect is that it is not necessary to provide a dedicated means for selection.

In the present embodiment described above, the recording medium, which is a disk-shaped magnetic sheet having a plurality of tracks, was used as the storage means for recording information in a plurality of blocks. It may be provided, or may be a tape-shaped recording medium, or may be a fixed memory such as a semiconductor memory.

As means for reproducing information from the storage means, in this embodiment, heads 3-1 and 3-2 for accessing the tracks on the magnetic sheet, a reproduction amplifier 6 for processing the signals of the heads, a demodulation circuit 9 are used. , 1 / 2H delay line 10 and switch SW4 are used, but when appropriate means is used depending on the type of storage means, for example, when an optical recording medium is used as the storage means, when a solid-state memory is used as the optical head. In this case, a means for accessing each block of the memory may be used.

Further, in this embodiment, the updating means for updating the block to be reproduced is composed of a step motor 24 for moving the heads 3-1 and 3-2 in the radial direction of the magnetic sheet 1, a magnetic head moving mechanism 3, and a control circuit 23 '. However, when a tape-shaped recording medium is used as the storage means, the tape may be wound up, and when a solid-state memory is used as the storage means, each address of the memory is accessed. Can be used.

Further, in this embodiment, setting means for setting the interval time when the updating means is driven in the interval manner is shown in FIG. 14 which is executed by turning on the interval time setting switch 57 and the interval time setting switch 57. In the flow shown, the 10 keys 63 to 72 whose state is detected are set, but when setting the time,
Instead of using the 10-key, it is possible to set the cyclic settings as used in digital clocks, or other methods may be used.

Further, in the present embodiment, the means for supplying the external trigger signal for operating the updating means from the outside is the terminal connected to the printer 13 'which is the external equipment shown in FIG. 1, but instead of the printer. Any terminal may be used as long as it is connected to a device that processes the information stored by the storage means. Further, it may be a terminal connected to a device such as a simple timer device, or may not necessarily be used in the case of wireless control from an external device.

Further, in the present embodiment, when the setting means makes the updating means inoperable, the setting means controls the operating means to operate the updating means in response to the external trigger signal so that the interval time becomes zero. When set, the subroutine K shown in FIG. 16, especially # K-17'-
Although the step of # K-15 for executing the flow of # K21 ′ is performed, instead of setting the interval time to 0, an inexecutable number or a symbol is set when a symbol can be set. Good.

<Effects of the Invention> As described above, according to the present invention, the mode that operates in response to the external trigger signal can be set by the setting means for setting the interval time, so that the operability is improved. Produce an effect.

[Brief description of drawings]

FIG. 1 is a block diagram showing the construction of an embodiment of the present invention, FIG. 2 is a view showing a combination of switching states of SW2 to SW5 shown in FIG. 1, and FIG. 3 is a front view of the apparatus of this embodiment. 4 and 5 are front views of a remote control device used together with the device, and FIGS. 5 to 18 are flowcharts of the CPU 40 shown in FIG. 1 ... Magnetic sheet 3-1, 3-2 ... Head 40 ... CPU

Claims (3)

[Claims] 1. A reproducing apparatus for reproducing information from a storage means in which information is recorded in a plurality of blocks respectively, the updating means for updating the blocks to be reproduced, and an interval time for driving the updating means at intervals. And a means for supplying an external trigger signal for operating the updating means from the outside, and the external means when the updating means is set to be inoperable by the setting means. A reproducing apparatus comprising a control unit that operates the updating unit according to a trigger signal. 2. The control means is means for operating the updating means in response to the external trigger signal when the interval time is set to "0" by the setting means. The reproducing apparatus according to item 1. 3. The reproducing apparatus according to claim 1, wherein the means for supplying the external trigger signal is a terminal connected to a printer.