JPH01138857A - Controller - Google Patents

Abstract

PURPOSE:To facilitate the circuit integration of a video circuit by revising only a data corresponding to an adjusted item among plural adjusting items and transferring the data of all the plural adjusting items serially. CONSTITUTION:A serial data is supplied to a shift register 101 from a deflection circuit 32 in the unit of 65 bits and a blanking pulse Pb is supplied as a clock pulse. The data is converted into an analog voltage by a D/A converter 103 at every adjustment item and the analog control voltage of each adjustment item is extracted. Then the adjustment control voltage of the sound volume and sound quality is fed to electronic control circuit of a preamplifier 23 and the adjustment control voltage of other item is supplied to each electronic control circuit of a video circuit 14. Since the data of each item are transferred serially for the adjustment, it is enough to add one pin for the data in case of circuit integration of the circuit 14 and then the circuit integration is facilitated.

Description

[Detailed Description of the Invention] In a color television receiver, the user adjusts the following according to his/her preference: volume, sound quality, hue, color picture, brightness and sharpness. Also, the things that the manufacturer adjusts at the factory include: brightness when the brightness knob is set to the standard position, hue when the hue knob is set to the standard position, contrast GC when the contrast knob is set to the standard position, etc. .

Since these adjustments are generally made using variable resistors, when the receiver is integrated into an IC, these variable resistors are externally attached to the IC.

However, if you attach many variable resistors externally to the IC,
The effect of IC implementation is small, which is disadvantageous for IC implementation. Further, since the variable resistor is a moving component, its reliability is low and the cost is high. Furthermore, since the variable resistor is relatively large, it reduces the degree of freedom in the design of the receiver. In addition, adjustment using a remote control is difficult. Furthermore, when adjustments are made at the factory, the adjustments can only be made from the rear of the receiver, which has the disadvantage that it is difficult to make adjustments while looking at the screen.

This invention seeks to eliminate these drawbacks.

For this reason, in this invention, switches are provided for each item to be adjusted, and each adjustment can be made by the switch output.For example, when the volume up switch is pressed once, the volume increases by one step. so that it becomes only larger. In this case, the output data of the switch is sent in series from the operating section to the receiving section through a single line.

An example of this will be explained below. Note that this example is a case where the above-mentioned items can be adjusted.

In FIG. 1, (11) indicates a tuner, which is of an electronic tuning type with, for example, a variable capacitance diode as a tuning element.
It is designed to be able to receive any HF and UHF channels. In addition, (41) is a tuning voltage forming circuit, (4
2) indicates the channel selection switch, and when the number of the desired channel is entered manually using the switch 42), the formation circuit (4
In step 1), a tuning voltage corresponding to the channel is formed, and this is supplied to the tuner (11) to tune the desired channel. In addition, this formation circuit (4
1) is also designed to memorize the channel being received when the power is turned off, and to supply the tuning voltage of that channel to the tuner (11) the next time the power is turned on. .

Furthermore, ri43) is a remote control signal receiving element, for example, in the case of an infrared remote control, its infrared light receiving element, (
Reference numeral 44) indicates a receiving circuit, in which the remote control signal from the element (43) is decoded, and a channel selection signal is supplied to the formation circuit (41) to be used as a channel selection voltage.

The intermediate frequency signal from the tuner (11) passes through the video intermediate frequency amplifier (12) to the video detection circuit (13).
The color video signal and the audio intermediate frequency signal are demodulated, the color video signal is supplied to the video circuit (14), where it is separated into a luminance signal and a carrier color signal, and a color difference signal is demodulated from this carrier color signal. At the same time, it is matrixed with the luminance signal to form three primary color signals. This signal is then supplied to a color picture tube (16) through an output circuit (15) to reproduce a color image.

Also, the audio intermediate frequency signal from the detection circuit (13) passes through the audio intermediate frequency amplifier (21) to the audio detection circuit (22).
), the audio signal is demodulated, and this signal is supplied to a speaker (25) through a preamplifier (23) and a main amplifier (24).

Further, the video signal from the detection circuit (13) is supplied to a synchronization separation circuit (31) to separate horizontal and vertical synchronization pulses, and these pulses are supplied to a deflection circuit (32) to form horizontal and vertical deflection signals. These signals are supplied to the deflection coil (35) through output circuits (33) and (34). Note that (36) is a high voltage generation circuit.

In this case, for example, if you want to adjust the volume, the preamplifier (23
An electronic level control circuit is provided in the audio signal line of ), and the analog control voltage supplied to this circuit changes the level of the audio signal so that the volume can be adjusted. The preamplifier (23) is provided with an electronic control circuit for the above adjustment items, and can be adjusted using an analog control voltage.

Further, in this example, each circuit surrounded by a broken line is one IC.

Further, (50) is a transmitter that sends out adjustment data for the above items by switch operation, and (100) is a receiver that receives the data and forms an analog control voltage for adjustment.

In this example, the transmitter (50) has a microcomputer configuration as shown in FIG.

That is, in FIG. 2, (51) is, for example, a 4-bit processing CPU, and (52) is a ROM in which the program of the flowchart shown in FIG. 4 is written.

(53) is a RAM for the work area, (54) is a data bus, and (55) is an address bus. Also, (56) is a non-volatile memo that stores all the data of the above adjustment items! J, (61) to (65) are 4-bit parallel input or output ports having a latch function, and (66) is a serial output port. Note that if this microcomputer is a so-called one-chip microcomputer, circuits (51) to (55), (61), (66)
) is integrated into a single chip IC.

Furthermore, So”=S+s is a switch for adjusting the above items, Sm is a mode switch, and switch S
. -3I5 is matrix connected and CPU
Pulses for dynamic scanning are supplied from port (51) through port (61), and the switch output is taken into the CPU (51) through port (62). Furthermore, the mode switch Sm is switched between the user's adjustment and the manufacturer's adjustment, and this switching causes the switch S to change. For example, the meaning of -315 is changed as shown in FIG.

Note that the switch 514 is used to set the color, hue, brightness, and picture to the standard state when it is operated, and the switch 515 is used to turn audio muting on and off each time it is operated. It is.

In addition, St indicates a test switch, and this switch S
When t is on (normal mode), switch S. −
Each time you change 3's, the corresponding item changes by one step, but when it is off (quick mode),
Switch S. This is to make the corresponding item maximum or minimum by just changing -3+s. Further, (71) is an initial reset circuit when the power is turned on, (72) is a buzzer for making a pep sound when a switch is operated, and (73) is L and ED.

Furthermore, in order to switch between the eight GCs when receiving VHF and when receiving UHF, a band instruction signal that is "0" when receiving VHF and "1" when receiving UHF is taken out from the tuning voltage forming circuit (41). This signal is boat <63
). Further, a signal instructing adjustment of the above items is taken out from the receiving circuit (44) of the remote control, and this signal is supplied to the port (63). In this case, the command signal is sent to the switch S in this example. -51
It has the same format as the output in step 5, and can only be obtained once for each operation of the remote control transmitter.

Furthermore, as shown in FIG. 3 from the deflection circuit (32),
The blanking pulse pb is '1'° in the horizontal blanking period th and the vertical blanking period 1v.
is taken out, and this pulse Pb is supplied to Pau (65). This pulse Pb is used as a clock for data transfer from the transmitter R (50) to the receiver (100).
As shown in the figure, the pulse Pb is also supplied to the receiving section (100). Further, this pulse Pb is applied to the video circuit (14
) and is used for burst flags, etc.

Then, the data is serially sent to the receiving section (100) through the port (66), and the format of the data sent is as shown in FIG. 3C and FIG. 7, for example. That is, as shown in FIG. The data order and number of bits of each adjustment item in the data are as shown in FIG. Then, as shown in FIG. 3C, a 4-bit, 7-bit guide bit of level "1" is added to the beginning of one set of data,
A 4-bit latch bit is added to the string, and data is sent in order starting from the LSB.

Furthermore, the data is sent from the receiving section (10) (66) to the receiving section (10
0) is as shown in Figure 3A and B, after the CPU (51) is ready to pass the data and after the end of the first vertical blanking period iv, the horizontal blanking pulse is sent to It is sent from the guide pulse in synchronization.

And switch S. -315 or when operating the remote control, the CPU (51,) changes only the data of the item to be adjusted according to the program in the ROM (52), and then sends the data of all items to the receiving unit (100). The structure and operation of the steps of the program written in the ROM (52) are shown in FIG. 4 and as follows.

[201] When the power is turned on, the computer (50) is reset by the initial reset circuit (71) and starts from this step.

C202) Initialize ports (61) to (66), etc.

[203] Data of all items is read from the memo IJ (56) and transferred from the memory card (66) to the receiving unit (100) in the format and timing shown in FIG. Note that this data transfer is performed several times in consideration of stability when the power is turned on.

Therefore, through these steps [201E to [203], the volume and other settings of the receiver are set to the state they were in when the power was turned off, and this state continues until the next data is sent.

(211) Switch S. -315 is operated, data must be transmitted only once even if the switch is pressed continuously. This step is to set a flag for performing such an operation, and the flag F is set to "O". Note that data transfer is permitted when F-“0”.

[212) Switch S. -515 is operated, and if it is operated, jump to step (221), and if not operated, proceed to step [, 213].

[213] Determine whether or not there is a remote control output signal from the receiver 1d circuit (44). If there is, jump to step [223); if not, proceed to step [214:].

[:214) Based on the band instruction signal from the channel selection circuit (41), it is determined whether or not band switching between VHF and UHF is being performed, and if it is being performed, step [2
41), and if it has not been performed, proceed to step (211).

Therefore, when no operation is performed on the receiver,
The CPU (51) executes steps [211E to [:214]
The above operation is simply repeated, and the data is not sent to the receiving section (100), and the volume etc. remain as they were before.

[211] This is a step to determine whether data can be transferred based on flag F. If F'+"O", step [
212], and if F-“0”, step [2
Proceed to 22).

[:222] Set F="1".

(223) The details will be described later, but switch 5o-3+s.

Sm and St create data for one corresponding item.

[231] Take note of the created data! Write to the corresponding address of J (56).

C232) Memo! The data of all items are read from J (56) and sent to the receiving unit (100) through the port (66) in the format and timing explained in FIG.
Transfer to.

C241'] This is a step performed when it is determined in step (214) that band switching is being performed, and AGC data for a new reception band is created.

Further, step [223:] is structured into a routine as shown in FIG. 5, for example. That is, :aOt) This routine starts.

C302) Determine whether the F-made switch is the switch 514, and if it is the switch S14, jump to step [331E; if not the switch S14, proceed to step (303).

C3031F determines whether the created switch is the switch SI5, and if the switch is StS, the process jumps to step C341E, and if it is not the switch SI5, the process proceeds to step [:304].

(304) It is determined whether the switch St is on (normal mode) or off (quick mode), and if it is on, the process proceeds to step [:311], and if it is off, the process proceeds to step C312].

(:311 E switch Sm is on (user mode)
It is determined whether the mode is on or off (manufacturer mode), and if it is on, the process proceeds to step C321E, and if it is off, the process proceeds to step (322).

(312) Determine whether the switch Sm is on or off. If it is on, proceed to step [323:]; if off, proceed to step (324).

C321] This Stellar can be used by the user by pressing switch S in the middle column of Figure 6. -313 When any of the adjustments are made,
That is, these are the steps that are performed when Yu-day normally adjusts the television. Therefore, switch S. -51
When any one of 3 is operated, the data of the adjustment item corresponding to the operated switch is changed so as to move the adjustment item up or down by one step.

[322] This step is carried out by the manufacturer or service personnel using switch S in the right column of FIG. -5T.

S I O = S I A step executed when any of the 3 adjustments is made, and when any of these switches is operated, the adjustment item corresponding to the operated switch is changed by one step. Change the data of the adjustment item so that it increases or decreases.

[323] This step is performed by the manufacturer or service personnel using switch S in the middle column of FIG. -3I3 This is a step executed when performing any adjustment in quick mode. Therefore, switch S.

- When any of SI3 is operated, create data that maximizes or minimizes the operated adjustment item.

(324) This step is the same as step [323], and is the switch S in the right column of FIG.

~ S715 This is a step executed when performing any adjustment of IQ-Sk3 in quick mode, and the data is set to maximize or minimize the operated adjustment item.

(331) Create data whose hue, color, picture, and brightness have standard values.

[341:] This Stella is a step executed when turning on/off audio muting, and switch 3
Each time 15 is operated, data that sets the volume to the current level and data that sets the volume to 0 are alternately output.

(351) This routine [223] is ended.

On the other hand, the receiving section (100) is configured as shown in FIG. 8, for example. That is, the receiving section (100)
A 65-bit shift register (101), a latch circuit (102) that latches <57 bits of data excluding the first 4 bits and the last 4 bits of this shift register (101), and this launch circuit (102).
and a D-A converter (103) that converts the output of the output into analog voltage for each adjustment item.

Then, the first four bits and the last four bits of the shift register (101) are supplied to an AND circuit (104), and the AND output is supplied to the latch circuit (102) as a latch pulse. Further, the shift register (101) is supplied with serial data in units of one set (65 bits) from the deflection circuit (32), and is also supplied with a blanking pulse Pb in the form of a clock pulse.

In this case, the input data is the vertical blanking period tv
After the completion of the shift register (10
1) Data is sequentially transferred from the guide pulse to the subsequent stage using the blanking pulse in a shogi-like manner.

Then, when one set of data is transferred from the transmitter (50), the shift register (101) contains one set of 65-bit data at once, and the first four pins and the last one are stored at once. This means that the 4 bits store the latch via) and guide focus, respectively.

Therefore, when the transfer of one set of data is completed, a latch pulse is obtained from the AND circuit (104), and 57 bits of data are latched into the latch circuit (<102). This data is then converted into an analog voltage for each item in the D-A converter (103).
Analog control voltages for each adjustment item are extracted.

The volume and sound quality adjustment control voltage is controlled by the preamplifier (23
), and the regulated control voltage of that item is supplied to each electronic control circuit of the video circuit (14).

In addition, (105) is a temperature compensation circuit, (107)
is a failure countermeasure circuit, the details of which will be described later.

Therefore, when the user turns on the power, the channel selection voltage forming circuit (41) selects the channel that was available when the power was turned off, and items such as the volume shown in FIG.
Steps C201] to [203] are set to the state when the power is turned off.

If no new operation or adjustment is performed, the loop of steps [211] to (214) is repeated, and this state continues.

Then, for example, switch S to increase the volume.

When you press step (212) → [211) → [222
Step C223) is executed through the process of :1, and in this step C223) step [:3211]
The volume data is incremented by one step. This data is then written to the memo IJ (56) in step C231], and then in step C2.
32), the data of all items is sent to the receiving section (100)
will be forwarded to. Therefore, the D-A converter (103)
From this, only the analog voltage for volume control is increased by one step to obtain each control voltage, and only the volume is increased by one step.

In this case, since it is set to F-"l" by step C222), when switch S0 is pressed continuously, from step [232] onwards, step (21
2) l and [2213 are repeated, thus switch S. Even if you press the button continuously, the data is changed and transferred only once.

However, switch S. When releasing once and then pressing again, step (212] is followed by step C2], 3)
, through (214) and in step [211] F=“
0'', so when the switch S is pressed again, steps [221) to [222] are executed.

(223) through step (231:l, (23
Proceed to step 2), thus modifying and transferring the decoup.

Therefore, switch S. Each press increases the volume by one step.

And the same thing happens when operating the pond switch S+-3e3,
Adjustment is performed one step at a time for each operation.

Also, if the mode switch Sm is the manufacturer mode,
Adjustments in the right column of Figure 6 can be made one step at a time.
If test switch St is set to quick mode, switch S. -Press any one of 311 once to maximize or minimize that item.

Furthermore, when the switch s, , is pressed, the step [
:331) is executed, so hue, color, picture, and brightness are set to standard values.

Also, when switch SI5 is pressed, step [3]
41] is executed, the audio muting is turned on and off every time the switch S+5 is pressed.

In this case, even if there is no data from the transmitting section (50), the blanking pulse Pb is sent to the shift register (10).
1) Since it continues to be supplied to the shift register (10
1) The data spills out one after another, and all the data spills out after 130 horizontal periods have elapsed from the vertical blanking period t. Therefore, before the next vertical blanking period, there is no decoupling from the transmitter (50) in the shift register (1,01).

Therefore, when a new set of data is sent from the transmitter 50), the previous data remains in the shift register (101), and the four pinpoints at the beginning and end of the shift register (101,) are Even though they are not guide pits or latch bits, they all become "1", so a latch pulse is obtained incorrectly, and incorrect data is sent to the latch circuit (102).
There is no such thing as being latched to.

Figure 9 shows the above shift register (101), launch circuit (102) and D-A converter (103).
This is a part of a specific circuit example of I2
This is an example when L logic is used. In the figure, there is a shift register (101) and a latch circuit (102).
It shows the connection state of the focus portion and also shows the case where this one focus portion is the LSB of the adjustment item. And D-
The Δ converter is I21. This is a simple type I)-A converter that utilizes the uniformity of the current amplification factor of the I2L transistor.

By the way, the temperature compensation circuit (105) compensates for the temperature characteristics of the D-A converter (103), and the injector current I of I'L is common to the D-A converter portion for each adjustment item. It takes advantage of this fact. In other words, 9, (106) is a dummy D-A converter part for about 5 pins, and this dummy D
A temperature characteristic compensation circuit (105) is made to work on the -A converter section (106).

If this dummy D-'A converter part (106) is stable against temperature, the D-A converter parts for each item, which have almost the same characteristics as this part (1"6), are also stable against temperature. It is something that becomes.

In addition, although it is a failure countermeasure circuit (107), a transmitting section (5
If the receiver (100) is malfunctioning and no data is sent to the receiver (100) even though the power switch is turned on, normal color images may not be produced even though the receiver is not malfunctioning. This causes the inconvenience of not being displayed. In order to prevent this, in this example, a failure countermeasure circuit (107) for the transmitter (50) is provided.

That is, for example, the 12 V (7) power supply voltage Vcc is divided by resistors (108) and (109), and the divided voltage is applied to the detection switching transistor (110).
) is applied to the base of In this case, the power supply voltage Vc
As shown in Fig. 10, c rises with a constant time constant from when the power is turned on, but
The transistor (110) is turned off when the power supply voltage Vcc is, for example, 5.3V or less.
When is off, data corresponding to the center value of the control voltage adjustment range for each adjustment item is preset in the latch circuit (102). However, regarding the volume,
The data corresponding to the minimum value is preset instead of the central value.

Therefore, if the transmitter (50) is malfunctioning and no data is sent, the data preset in the latch circuit (IO2) by the failure countermeasure circuit (107) remains as is, and the adjustment points for each adjustment item are An image with the median value is displayed. However, the volume is zero.

Therefore, even if the transmitting section (50) is out of order, a normal color image can be obtained, and there is no chance of it being mistaken for a fault in another receiver circuit section.

However, if the transmitter (50) is not malfunctioning, after the power is turned on, the non-volatile memo IJ (56)
Since the set of data is sent to the receiving section (100) several times, the preset data of the latch circuit (102) is rewritten, and the normal operation as described above resumes.

The reason why only the volume is not set to the median value is that when the power is turned on,
This is to prevent noise from being emitted from the speaker (25).

You can adjust each item as described above, but
In this case, especially according to the present invention, since the data of each item is serially transferred and adjusted, the video circuit (
14), it is only necessary to add one pin for data, making the IC implementation easy and highly effective.

Also, the data is switch S. -3's, it has higher reliability and lower cost than a variable resistor. Furthermore, switch S. -3T allows for miniaturization and allows greater freedom in the design of the receiver. Also,
Since data can be formed by remote control,
Adjustments can be made using the remote control. Furthermore, if adjustments are made at the factory or by a service person, the mode switch Sm must be set to the manufacturer mode (the user can make the adjustments using the switch S.-315, r
In other words, the switch So”3 provided on the front of the receiver
Adjustments can be made while looking at the screen in 1 s, and adjustments are easy.

In addition, even if the color, hue, brightness, and picture are set to a random state, you can immediately return them to the standard state by simply pressing switch S14, and make appropriate adjustments by operating the adjustment switches for each of these items. The troublesome operation of restoring the state becomes unnecessary.

Note that the transmission signal and reception section (100) may also have the following configuration.

That is, FIG. 11 is an example of this, and in this example, index data for identifying each item is added to the transmission data. In the example shown, one item of data is 8 bits and is sent serially starting from the LSB.
The upper 4 bits are the identification data, and the lower 4 bits are the m-connection voltage data.

Then, the transmission data is supplied to the shift register (111), and to this shift register (111), for example, the blanking pulse Pb is supplied as a clock pulse as in the above example. Furthermore, the transmitter (50) also sends an end pulse indicating the turning point of the item for each 8-bit serial data item.

Then, in the receiving section (100), this end pulse causes the switch circuit (gate circuit) (112) and (113
) is turned on, and the item identification data is transferred to the switch circuit (
112) to a decoder (114).

This decoder (114) decodes the identification data and switches it to a switch circuit (115) provided for each item.
A) (115B) The switch circuit of the designated item is turned on. And the shift register (
The adjustment voltage data from 111) is stored in a temporary memory circuit (116^) (116B) which is also provided for each item.
. . . is supplied to the corresponding temporary storage circuit through the turned-on switch circuit and temporarily stored, and the output is sent to the D-A converter (1) provided for each item.
17A), (117B), etc., it is converted into an analog voltage, taken out, and supplied to the electronic control circuit of the adjustment item.

Further, FIG. 12 shows another example, in which the transmission data does not have index data of adjustment items, and only adjustment voltage data is transmitted serially to each item,
End pulses indicating milestones for each item are also received by the receiving unit (100).
sent to.

Also in this example, the receiving section (100) includes switch circuits (122A) (122B) for each item.
)..., -time memory circuit (123A) (123B)
..., D-A converter (1248) (124B
>... is set up (Surare, shift register (121)
provides parallel data for each item. In this example, the data is cyclically transmitted to the items (therefore, end pulses are supplied to the ring counter (125) for the number of items, and the output of this ring counter (125) causes the switch circuit (12
2A) (122B)..., the switch circuit corresponding to the transmitted item is the shift register (122B)...
1> is controlled to turn on when data for that item is stored.

By the way, for example, when adjusting the volume, rather than changing the adjustment voltage linearly even with step changes, use a variable resistor.
A so-called D curve (a curve that changes slowly when the amount of change is small and changes greatly when the amount of change is large) is preferable.

FIG. 13 shows an example of a D-A converter that takes this into consideration.

That is, switch circuits (131) to (134)
is provided to correspond to 4-bit data,
Switch circuit (131) is LSB, switch circuit (
134) is controlled by the MSB state, and the switch circuit (135) is the MSB switch circuit (134).
It is designed to be linked with.

In this case, if the transistor (136) is on and the transistor (137) is off, the regulated voltage changes as shown by straight line A in FIG. 14 with the step change. Also, transistors (136) and (137)
If both are on, the output current will be large, so
The adjustment voltage changes as indicated by the broken line B in the figure.

In this example, while the MSB is in the "0" state, the switch circuit (135) is switched to the state shown in the figure, and the transistor (137) is turned off. Switch circuit (13)
4) When is switched, the switch circuit (135) is put into a state opposite to that shown in the figure, and the transistor (137) is turned on.

Therefore, when there is a step change in only the lower three bits, the analog voltage changes slowly along the straight line, and the MSB
When a step change occurs, the voltage changes greatly along the solid line B' parallel to the broken line, so the overall change approximates a D curve, as shown by the thick line in the figure.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of an example of this invention, Fig. 2 is a system diagram of a part of it, and Figs. 3 to 7 are diagrams for explaining the same.
8 to 13 are connection diagrams of some examples thereof, and FIG. 14 is a diagram for explaining the same. (14) is a video circuit, (50) is a transmitter, (100)
is the receiving section. Agent Paige Ito
Hidetaka Matsukuma Figure 6 Figure 7
Figure No. 9 @ Shift register for r role No. 13
Figure 14 2com [f〒r2i-soft. Procedural amendment 1. Indication of the case 1986 Patent Application No. 211182 3, Person making the amendment Relationship with the case Patent applicant address 6-7-35, Kitashinyo, Tokyo Parts Ward Name (2
1B) Sony Corporation Representative Director Norio Ohga 4, Agent 6, Number of inventions increased by amendment 7, Subject of amendment Opening of detailed explanation of the invention in the specification (1) Page 3 of the specification, 12 -Correct "send." in line 13 as follows. [At the same time as sending, the data of all adjustment items is changed and only the data of the adjusted item is sent. "that's all

Claims (1)

[Scope of Claims] Data of a plurality of adjustment items is transferred in series, this transferred data is converted into parallel data for each adjustment item by a shift register, and each of the converted data is transferred to D-
A control device that is supplied to the A converter to obtain a control voltage for each adjustment item, and when data is adjusted by the adjustment means, the control voltage of all the stored adjustment items is A control device that changes only the data corresponding to the adjusted item, and then serially transfers the data of all the adjustment items.