JP3483632B2 - Multi-function measuring instrument - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunction measuring instrument having a large number of measuring functions, and more particularly to a multifunction measuring instrument suitable for measuring various different measurement items or parameters of a product. It is related to vessels.

[0002]

2. Description of the Related Art Conventionally, a measuring instrument in which a plurality of measuring functions and a signal source are integrated has been used in consideration of multipurpose measuring applications, and such a measuring instrument is referred to as "multifunctional measuring instrument" in this specification. I will call it. The multi-function measuring instrument was developed mainly as one means of automation / labor saving in the recent production line of multifunctional / high-performance electric products, and has many measuring functions integratedly. This allows virtually all measurements / inspections on the product. Furthermore, by using a multi-function measuring device, it is not necessary to prepare various kinds of individual measuring devices on the production line, which is useful for saving space on the production line.

As an example of such a multifunctional measuring instrument, a Model 4850 2-channel audio system manufactured by the present applicant is used.
There is an analyzer. This analyzer integrates an oscillator as a test signal source and instruments such as a voltmeter, a frequency counter, and a pass / fail judgment device for adjustment / inspection of audio systems such as VTRs and cassette decks, and level, channel balance, Various items such as S / N ratio, distortion rate, frequency characteristic, tape speed, wow and flutter, and DC voltage can be measured. Another example of the multi-function measuring device is a model number VP-1612 manufactured by Matsushita Communication Industrial Co., Ltd.
There is also an A measurement system processor, etc.

It is essential for the measuring instruments used in the production line to confirm the performance of the measuring instruments in order to ensure the reliability of the products produced in the line. In order to confirm the performance of a multi-function measuring instrument as described above, it is usually necessary to prepare separately for each of the many measurement functions that the multi-function measuring instrument has and for the entire measurement range of each measurement function. The inspection is performed in detail by using a measuring device such as a signal source and a measuring instrument, and the measurement error in each measurement function is inspected or calibrated.

[0005]

In the measurement error inspection or calibration by the above method, each measurement function can be individually and accurately inspected, but there are various problems. For example,
1) A large number of external measuring instruments are required, 2) A measuring instrument for calibration is required to be placed, 3) Calibration takes a long time, and 4) Skilled operation is required. ,.

Therefore, it is an object of the present invention to provide a multi-function measuring device and a calibration method therefor capable of easily performing calibration including measurement error inspection. Another object of the present invention is to provide a multi-function measuring device and a calibration method thereof that can perform calibration without the need for an external measuring device. Still another object of the present invention is to provide a multi-function measuring device and a calibration method thereof that can shorten the calibration time. Still another object of the present invention is to provide a multi-function measuring instrument and its calibration method that do not require an expert for calibration.

[0007]

In order to achieve the above object, in the present invention, a multi-function measuring instrument is provided with a self-calibration mode in addition to the measurement mode, and the multi-function measuring instrument is internally connected to provide a large number of measurement functions. Allows calibration including inspection of each measurement error.

More particularly, it is a multi-function measuring instrument having a plurality of measuring functions for making measurements on a plurality of parameters of an object to be measured, the instrument including at least one test signal source means and a plurality of single-function instrument means. In a multi-function measuring instrument, a calibration method for calibrating the plurality of instrument means according to the present invention,
A) selecting any one of the plurality of instrument means; and b) selecting one of the at least one test signal source means used to calibrate the selected instrument means. Step c) connecting the output of the selected test signal source means to the input of the selected instrument means and obtaining a signal from the output of the instrument means, d) the value of the signal from the output of the instrument means And (e) a step of displaying a pass / fail judgment result according to the result of the comparison;
Equipped with. According to the present invention, further, when the output value of the measuring device is within the predetermined permissible range and there is an error from the reference value, the error is used to compensate the characteristic of the selected measuring device. Steps can be included.

According to the present invention, a multifunctional measuring instrument having an input terminal and an output terminal, which has a plurality of measuring functions for measuring a plurality of parameters of an object to be measured,
A) A plurality of single-function measuring means having functions corresponding to the plurality of measuring functions, the plurality of single-function measuring means including at least one test signal source means, and the plurality of single-function measuring means. Each of the measuring means has an input and an output or an output, the plurality of single function measuring means, (b) the input terminal, the output terminal, and each of the plurality of single function measuring means, And (c) a mode designating means for generating a mode designating signal designating a measurement mode or a self-calibration mode of the multi-function measuring instrument, and (d) a control means responsive to the mode designating signal. If the mode designating signal is designating the measurement mode, controlling the connection means for measuring each of the at least one parameter selected from the plurality of parameters, The number of single function measuring means, the output terminal and the input terminal are connected, and when the mode designating signal designates the self-calibration mode, the selecting means is controlled by controlling the connecting means. Said control means for connecting each of said single-function measuring means relating to the measurement of each of said at least one parameter to the single-function measuring means used for self-calibration of said means.

According to the invention, said plurality of single function measuring means may comprise said at least one test signal source means and a plurality of instrument means each having an input and an output. Furthermore, the multi-function measuring instrument of the present invention is a) means connected to the outputs of the plurality of measuring instrument means, and processing the output signals from each of the plurality of measuring instrument means to obtain a measurement result. Processing means for generating a first signal representative of;
(B) determining means for receiving the first signal and comparing the result with a predetermined determination criterion to generate a second signal indicating a quality determination result; and (c) receiving the first signal or the second signal. And a display unit for displaying the measurement result or the quality determination result.

The multi-function measuring instrument of the present invention is connected to the control means and is a means for inputting the measurement conditions in the measurement mode and the inspection conditions in the self-calibration mode. The conditions are, for each of the parameters, the measurement point and the inspection point, and the first allowable range of the measurement result and the second inspection result that are the predetermined determination criteria.
The above-mentioned input means including a permissible range can be included. According to the present invention, for each of the parameters, the inspection point in the self-calibration mode can be the same as the measurement point in the measurement mode. Also,
The second allowable range of the inspection result may be narrower than the first allowable range of the measurement result.

Further, according to the present invention, in the self-calibration mode, when the inspection result is within the second allowable range, the display means is the single-function measuring means for measuring the parameter. Is good,
When not within the second allowable range, the display means
It may be indicated that the single function measuring means for measuring the parameter is not good.

Further, according to the present invention, the input means comprises:
Compensation means for compensating the characteristic of each of the plurality of multi-function measuring means is included, the compensating designating means for designating compensation of the characteristic of the corresponding single-function measuring means according to the inspection result. When the inspection result is within the second permissible range and there is a measurement error, if the compensation designating unit designates compensation, the compensating unit uses the measurement error to determine a corresponding value. The above-mentioned compensating means for compensating the characteristic of the single function measuring means may be included.

Further, according to the present invention, the control means includes:
Test signal source control means, which is connected to the test signal source means and controls so as to generate a signal having the same value as the measurement value point of the parameter, can be included. Further, the control means, when the selected at least one parameter is two or more, a sequence means for sequentially performing self-calibration for each of the two or more parameters,
Can be included.

Furthermore, according to the present invention, the sequence means includes:
A waiting time setting means for setting a predetermined waiting time may be included. Further, the standby time setting means sets the predetermined standby time to be the first in the measurement of each of the parameters.
Can be set to a second waiting time in the inspection of the parameter.

According to the invention, said plurality of instrument means are
The circuits may be common to each other.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a multi-function measuring instrument A having a set of input terminals and a set of output terminals, which is used for measuring, inspecting, adjusting, etc. an object to be measured MD. This multifunctional measuring instrument A is
A set of input terminals 1 and a set of output terminals 2 for connecting to the input terminal and the output terminal of the device under test MD, a test signal source SS
Signal source unit 3 including 1 to SSi (correctly i ≧ 1), and instrument M
1 to Mj (provided that j ≧ 2), and a connecting portion 5
A processing / determination / display unit 6, an operation mode designation unit 7,
A measurement / self-calibration condition input unit 8 and a measurement / self-calibration control unit 9 are provided.

Each of the test signal sources SS1 to SSi has an output for generating a test signal necessary for realizing a corresponding measurement function, and, if necessary, a waveform, an amplitude, a frequency, a phase of the output test signal. And a control input (simplified in the figure) for receiving a control signal relating to electrical parameters from the control unit 9. Each of the instruments M1 to Mj is necessary to realize a corresponding measurement function, and has an input, an output for generating a signal of a measurement result, and an operating frequency, an operating range, etc., if necessary. Control input for receiving a control signal relating to the measurement operation of (1) (simplified in the figure). The connection unit 5 includes an output connected to the input terminal 1, an input connected to the output terminal 2, and a signal source S.
Input connected to each output of S1 to SSi and measuring instruments M1 to M
It has an output connected to each input of j and a control input for receiving a control signal related to the connection from the control unit 9.
In response to the signal received on this control input, the connection 5 connects the input / output of this connection in the required format. The processing / judgment / display unit 6 controls an input connected to each output of the instruments M1 to Mj, a control input for receiving a control signal related to processing / judgment / display from the control unit 9, and a signal indicating the result of the judgment. And an output for sending to section 9. This processing / judgment / display unit 6 digitizes the output from each instrument and other required processing, judges the processing result, and displays the processing result or the judgment result. The measurement / self-calibration control unit 9 has an output for generating the control signal, an input for receiving the determination result, and an input for receiving each output of the mode designating unit 7 and the input unit 8. There is. The mode designating section 7 produces at its output a signal instructing the operation mode of the multifunctional measuring instrument A, that is, either the measurement mode or the self-calibration mode. The measurement / self-calibration condition input unit 8 generates at its output a signal representing the measurement condition in the measurement mode and the calibration condition in the self-calibration mode. MD or D
For each parameter of the measurement target, the point of the value to be measured or inspected, and each allowable range of the measurement result and the inspection result are included.

The operation of the multi-function measuring instrument A having the above configuration is as follows. That is, when the mode designation unit 7 indicates the measurement mode, the signal source unit 3, the instrument unit 4, the connection unit 5, and the processing / judgment / display unit 6 are controlled according to the measurement conditions from the input unit 8, When it is necessary to apply a test signal to the device under test MD for measuring a given parameter, the output of the required test signal source is generated at the output terminal 2 via the connecting portion 5 and the device under test is measured. Apply to MD. The output of the device under test MD is sent to the input of the meter corresponding to the measurement of the above parameters via the input terminal 1 and the connecting portion 5 both when the application of the test signal is necessary and not necessary. The processing / judgment / display unit 6 that receives the output of this instrument performs the required processing to obtain the measurement result, and also makes a pass / fail judgment using the allowable range for the measurement result related to the parameter. Further, one or both of the measurement result and the quality determination result are displayed. next,
Depending on the quality judgment result or regardless of the result,
If there are other parameters to measure, repeat the above process.

On the other hand, in the self-calibration mode, one or more designated ones of the signal sources SS1 to SSi and the instruments M1 to Mj are calibrated according to the self-calibration condition from the input unit 8. When calibrating the signal source,
The output of the signal source is applied via connection 5 to the instrument required for the calibration. The output of this instrument is processed / determined / displayed by the processing / determination / display unit 6, and in this case, the allowable range for calibration is used. On the other hand, when calibrating an instrument, the output of the signal source necessary for calibrating this instrument is applied to the instrument through the connection section 5, and the processing / judgment / display section 6 allows the instrument calibration range. Is used to perform the same processing, determination, and display as in the above measurement mode. 2 things to calibrate
If so, repeat the above process in turn for each of the remaining. In the self-calibration mode, since the same points as the measurement points of each parameter in the measurement mode are inspected, the signal source or instrument can be controlled.

Next, with reference to FIG. 2, an audio measuring system B in which the multi-function measuring instrument A of FIG. This measuring system B
Is an AC voltmeter, an oscillator, a frequency counter, a DC voltmeter necessary for adjusting / inspecting the audio system of the object to be measured MD 'such as a car stereo, radio-cassette recorder, VTR, and cassette deck.
This is an automatic measurement system that can perform measurement and control of jigs and external devices at high speed by integrating a strain rate meter and a determination unit. As shown in the figure, the system B has AC input terminals 10 (only one is shown in the figure) of each of channels (CH) 1 and 2; one DC input terminal 12; one counter input terminal 14; and CH1 and CH2, respectively. Output terminals 20 (only one of which is shown in the figure) of the device under test MD, and an output terminal O of the device under test MD ′ shown as an example.
UT, two check terminals TP (two examples of check terminals inside the object to be measured, in the illustrated case, a frequency check terminal and a DC voltage check terminal) and an input terminal IN are connected to each other. be able to. Further, although not shown, there are wow and flutter DC input terminals and various monitor terminals for CH1 and CH2. The switching of CH1 and CH2 for the input terminal 10 and the output terminal 20 is performed by a switch (not shown).

System B corresponds to the test signal source unit 3 of FIG. 1 and is 315 Hz, 400 Hz, 1 KHz.
A reference (REF) oscillating unit 30 of any one of
A high frequency (HI) oscillator 31 having an oscillation frequency of 10 Hz to 200 KHz, a low frequency (LOW) oscillation unit 32 having an oscillation frequency of 10 Hz to 10 KHz, and a reference voltage of an A / D converter 60, which will be described later, as a DC voltage source. And an output 33. The outputs of the oscillators 30, 31, 32 are connected to the input ends (ON position) of the corresponding switching control type switches 34, 35, 36, and the other input ends (OFF position) are connected to the ground. The output end of the switch is connected to each input of the mixer 37, and the output of the mixer 37 that mixes the output of the oscillator is a variable attenuation type attenuator (ATT).
38 inputs.

The system B corresponds to the connection portion 5 in FIG. 1, and has switches 50 and 51 for relay type switching control.
And switch control type switches 52 and 53. That is, the input end of the switch 50 is connected to the output of the ATT 38, the output end of the switch 50 in the measurement (M) mode is connected to the output terminal 20, and the output end in the calibration (C) mode is the switch 51. It is connected to the input terminal in the calibration (C) mode. The measurement input end of the switch 51 is connected to the AC input terminal 10. The switch 52 has a calibration input end connected to the reference voltage output 33 of the A / D converter 60, and a measurement input end connected to the DC input terminal 12. When calibrating the switch 53, the input end is the switch 36
Is connected to the counter output terminal and its measurement input terminal is connected to the counter input terminal 14.

As the element corresponding to a part of the instrument unit 4 in FIG. 1, the system B performs the measurement related to the AC input, and therefore, the variable attenuation type ATT 40 having the input connected to the output end of the switch 51, and this. 4 sets of filter / attenuation variable ATT / detection circuit unit 4 each having an input connected to the output of the
1, 42, 43 and 44, and the outputs of these circuit parts are the reference (RE) of the changeover control type switch 48.
F), high range (HI), low range (LOW), distortion rate (DI
(ST) Each is connected to the input terminal. The filter of the circuit unit 41 has a filter characteristic for extracting a reference oscillation frequency component, and the filter of the circuit unit 42 has a filter characteristic for extracting a high frequency oscillation frequency component and a measurement weight filter characteristic (J
IS-A, CCIR-ARM, DIN-AUDIO, I
HF-T200, etc.) and can switch between them. The filter of the circuit unit 43 has a filter characteristic of extracting low oscillation frequency components.
The circuit unit 44 is a circuit for measuring the strain rate,
The filter has filter characteristics for distortion factor measurement. In addition, system B comprises a digital multimeter (DMM) unit 45 whose input is connected to the output of switch 52 for measurements related to the DC input,
The input control of this unit is connected to the control input of switch 52. Further, in order to perform the measurement related to the frequency, a counter prescaler 46 having an input connected to the output end of the switch 53 is provided, and the input control section thereof is
It is connected to the control input of switch 53. The output of the prescaler 46 is connected to the input of the counter 47.
Other elements of the instrument unit 4 are realized by the CPU 90 and the like described later.

The system B further includes a processing / determination / display unit 6
As part of the elements of the above, an A / D converter 60 having an input connected to the output terminal of the switch 48 is provided, which digitizes and outputs each input received. An external monitor (CRT) 62 can be connected to the system B as a display device. Further, a keyboard 70 is provided as an element corresponding to the designation unit 7 and the input unit 8 in FIG. 1, and this keyboard is provided with a ten key, a mode page (MENU, MEASURE, EDIT, T, though not shown).
PAGE key to select IMER mode), E
There are NTRY key, FUNCTION key group, jog dial, and other keys. Other elements of the processing / judgment / display unit 6 are realized by the CPU 90 and the like described later.

The system B corresponds to the elements corresponding to the measurement / self-calibration control section 9 shown in FIG. 1, the remaining elements of the instrument section 4, and the remaining elements of the processing / judgment / display section 6. As a CPU 90, CPU bus 91-1, internal control bus 91-2, ROM / RAM 92 for storing programs and data, various interfaces 93-
1 to 93-6, various control units 94-1 to 94-9, and a graphic display controller 95. More specifically, the CPU 90 is connected to the ROM / RAM 92 and further to the controller 9 via the CPU bus 91-1.
5 to an external monitor 62, and a keyboard 70 via a keyboard interface (I / F) 93-1.
Further, it is connected to the memory card MC for storing the measurement / self-calibration condition via the memory card I / F 93-2. The CPU 90 also uses the bus 91-1 and the A / D I
/ F93-3 is connected to receive the digital output of the A / D converter 60.

The CPU 90 is also connected to various control units 94-1 to 94-8 via a bus 91-1, a control I / F 93-4, and an internal control bus 91-2. In these control units, a frequency control 94-1 for outputting a signal for controlling the oscillation frequency to each control input of the oscillating units 30, 31, 32 and a mixing unit 37 for switching control of the switches 34, 35, 36. There are a mixing control 94-2 for controlling the combination of oscillation outputs input to the input terminal and an output level control 94-3 for controlling the attenuation amount of the ATT 38 to control the level of the signal output as the test signal. Further, the output switching control 94-4 and the input switching control 94-5 generate signals for controlling the relays so that the switches 50 and 51 are switched to the M position in the measurement mode, while they are switched to the C position in the self-calibration mode. . The input range control 94-6 is performed by each circuit unit 41.
The signals for controlling the attenuation amount are sent to the ATT 40 common to the .about.44 and the ATT unique to the circuit units 41 to 42, respectively. The filter control 94-7 sends a signal for controlling switching of the measurement weight filter of the filter of the circuit unit 42. Further, the distortion rate range control 94-8 generates a signal for controlling the amount of attenuation of the ATT of the circuit section 44. A / D input switching control 9
4-9 generates a switching control signal for the control input of the switch 48. Further, the CPU further includes an internal control bus 91-
It is also connected via 2 to the input control section of the DMM unit 45 and the input control section of the prescaler 46, which control switches 52 and 53 to the M position in the measurement mode and to the C position in the self-calibration mode. Control to switch.

Further, in the system B, an external personal computer 100 is provided via an RS-232C interface 93-5, and a GPIB interface 9 is provided.
An external GPIB device (for example, an additional test signal source, an instrument, etc.) can be connected via 3-6. Further, the system B includes a remote unit 102 for connecting a remote controller and an I / O unit 103 for controlling a jig that may be mounted on the object to be measured MD ′.

Therefore, the system B is equipped with a measuring system consisting of the following measuring means.

1) Two-channel AC voltmeter 2) 3 frequency mixed frequency characteristic measuring instrument 3) 2-channel strain rate meter 4) Measurement weight filter 5) DC voltmeter 6) Frequency counter 7) Reference frequency oscillator 8) LOW frequency oscillator 9) HIGH frequency oscillator 10) DC voltage source (A / D converter).

The measurement items or parameters, the ITEM name of each measurement item, the measurement content and its description are as follows.

1) AC level measurement MV: millibar (reference level), (input level is measured.
The high frequency oscillator 31 is used as the signal source. ) MV F: Wideband millibar (input level is measured. High-frequency oscillator 31 is used as a signal source.) 2) DC voltage measurement DC: DC voltage (DC voltage is measured) 3) Three-wave mixing frequency characteristic measurement REF: Reference level (Measure the reference frequency level of the frequency characteristic measurement by the mixed wave. Use the reference oscillation unit 30) HI: High frequency level (REF × 3 to 20 KHz) (Measure the high frequency level of the frequency characteristic measurement by the mixed wave. The high frequency oscillator 31 is used, and the level of the reference frequency is 0.
Relative value measurement as dB. ) LOW: Low-frequency level (50 Hz to REF / 3) (measures the low-frequency level of the frequency characteristic measurement by the mixed wave. The low-frequency oscillator 32 is used. The level of the reference frequency is 0.
Relative value measurement as dB. ) SHI: Mid-range level (2 KHz to 15 KHz) (Measure the mid-range frequency level of the frequency characteristic measurement by the mixed wave. Use the low-range oscillator 32. Note that the reference frequency level is 0.
Relative value measurement as dB. ) 4) S / N measurement MV S: S / N ratio (The input level is measured, and the relative level is calculated based on the level measured in the millival (MV) item.) 5) Strain rate measurement THD: Strain rate (0 .3% to 12% full scale, 6
Range) (The range of 0.3 to 12% is automatically selected according to the strain rate judgment reference value setting, and the strain rate is measured. The measurement frequency is 400 Hz or 1 KHz.) 6) Frequency measurement SPED: tape Speed, counter (3 KHz or 1
Measure the input frequency with a high-speed counter, centered at 9 KHz. ) 7) Channel balance measurement BAL: Channel balance, (CH1 (L) and CH2
Measure the level difference of (R). ) 8) Channel separation measurement MVCL: Channel separation R → L, (CH2
Measure leakage from (R) to CH1 (L). ) MVCR: Channel separation L → R (CH1
Measure the leakage from (L) to CH2 (R). ) 9) Wow and flutter measurement WOW: Wow and flutter (Wow and flutter meter is connected and used together, and wow and flutter is displayed on the monitor CRT.) 10) Setting completed END.

[0034] In system B as described above, in the measurement mode, switching the switches 50, 51, 52, 53 to the M position of each, and the self-calibration mode switching them switch to C (C AL) position. In each mode, that is, by switching control of 34, 35, 36, 48, the measurement described in the section of the above measurement item can be performed.

Next, the operation of this system B will be described with reference to FIG.
~ It demonstrates with reference to the flowchart and screen figure of FIG. As can be seen from the above, this system B has a measurement mode and a self-calibration mode, and in the self-calibration mode, the measurement error of each measurement function is checked and
The correction of the characteristic of the measurement function part based on this measurement error is included.

First, FIG. 3 shows a main routine executed by the CPU 90. In the first step of this flow, wait for key input by function key or page key, and the key input is [M
[ENU] key (step 901), step 90
At 2, the MENU screen shown in FIG. 4 is displayed and the process returns to the beginning.
In the state shown in FIG. 4, if there is a key input of the [MEASURE] key indicating measurement, step 903 to step 90
4 to enter the measurement MENU routine (FIG. 7). Upon entering this subroutine, the measurement main routine of FIG. 9, the measurement subroutine of FIG. 11, the measurement routine of FIG. 13, the self-calibration (CAL) main routine of FIG. 21, the inspection subroutine of FIG. It also enters the flow shown in the signal source control routine and the inspection routine of FIG.
When the measurement MENU routine of FIG. 7 ends, the process returns to the beginning of the main routine of FIG. If the key input is the [EDIT] key indicating editing, step 905 to step 906 enter the EDIT MENU subroutine to perform setting / editing as shown in FIG. 5 and FIG. Return to. Further, when the key input is the [TIMER] key indicating the timer setting, step 907
From step 908 to step 908, a timer setting subroutine for setting a clock built in the main body is entered, and when this is completed, the process returns to the beginning.

First, referring to FIGS. 5 and 6, EDIT
The setting / editing in the MENU subroutine will be described. As shown in the measurement MENU screen of FIG. 8 described later,
In this system B, eight different models 1 to 8 can be set as automatic measurements, that is, eight different types of DUTs, and for each model, a maximum of 20 measurement or self-calibration models can be set. Steps (also simply called steps) can be set. Each measurement / self-calibration model step corresponds to one screen on which six meters are simultaneously displayed on the CRT. As an example, FIG. 5 and FIG. 6 show a model 1 (a name such as a model number is “111111111”)
The model 1 includes model steps 1 to 15 (model steps 6 to 10 are not shown). As can be seen from the figure, at each model step, the measurement ITEM (see the above measurement item),
Frequency / output level of signal source, termination resistor ON-OFF / output channel (termination resistor ON when the first number of 3 digits is 1; only CH1 is output when the second number is 1, only CH2 is 2) Output, both CH1 / CH2 output when 3; 3rd number is oscillator output terminal selection), input channel selection (first F is CH1 input selection; second F is CH2 input selection), center value of meter display , Selection of internal filter (00: OFF; 0A: JIS-A filter), upper limit value and lower limit value of permissible range which is a criterion for measurement value, and
Other settings (WAIT time before measurement start, NG STOP mode selection to stop when NG, automatic model step feed time) can be set. The model step 15 shown in FIG. 6 is a setting end (END) step.

Next, referring to FIG. 7, step 9 in FIG.
The measurement MENU routine entered from 04 will be described.
In the first step 910, the measurement MENU screen shown in FIG. 8 is displayed. In the illustrated screen example, eight models are set. Next, in step 911, the key input of the model number is waited for, and in the case of ten key input, step 91
In step 2, step 916 is entered, and in the case of the model number input by the jog dial (indicated by a model selection mark with an arrow in FIG. 8), the steps are performed through steps 914 and 915, and the [ENTER] key (function key 7) is pressed in step 913. When pressed, the process proceeds to step 916. Step 9
In step 16, the input model number is set, and in the following step 917, the model measurement condition data of that number is read from the memory card MC (see FIG. 2). After this,
In step 918, the measurement main routine of FIG. 9 is entered, and at the end of this routine, the measurement MENU routine is also ended and the process returns to the main routine of FIG.

Next, the measurement main routine will be described with reference to FIG. In the first step 920, the measurement screen is displayed. The screen shown in FIG. 10 is displayed at the initial stage of the measurement. As can be seen from FIG. 10, one model step includes six meter display portions 620 (three CH-L and three CH-R) (meter number MN = 1 to 6). Next, in step 921, a key input is awaited, and [CA
L] key input: Step 922 to Step 923
21, the self-calibration (CAL) main routine of FIG. 21 is executed, and then the process returns to the beginning of this routine. on the other hand,
In the case of [START] key input, the routine proceeds from step 924 to step 925 to enter the measurement subroutine of FIG. 11, and then return to the beginning of this routine. Also, [M
In the case of [ENU] key input, the processing ends through step 926, and thus the routine of FIG. 7 ends.

First, the measurement subroutine of FIG. 11 will be described. In the first step 930, the model step number is set to 1. Then, steps 931-9
At 35, control is performed according to the model measurement condition data read from the memory card MC. That is, in step 931,
Performs external control including generation of I / O control output for jigs and outputs for GPIB device control. In step 932, the internal connection is switched, that is, the switches 50 to 53 are switched according to each measurement item. In step 933, control of the range of the measurement system, selection of filter characteristics, etc., and switching of the switch 48 are performed. In step 934, the frequency of the oscillator, the output level, the output channel, and the switches 34 to 3
6 switching, etc. are controlled. In model step 1 (MV (AC level measurement) in the setting example), only the switch 35 is turned ON, the switches 50 and 51 are in the M position, and the switch 4 is
8 in HI position.

Next, at step 935, screen display according to the measurement item is performed. In the model step 1, the screen shown in FIG. 12, which is a measurement item of millibar, is displayed. As can be seen from the edit screen of FIG. 5, the oscillator is the high-frequency oscillator 31, the oscillator frequency is 1 KHz, the output level is −5.0 dB, the output and input channels are both L and R, and the center value of the meter is −.
The level is 5.0 dB, and the allowable range is -2 to 2 dB. In FIG. 12, the allowable range is indicated by black bars 622 and 623, and the finger lines indicating the measured values are indicated by horizontal lines 624 and 625. At the upper right of the screen, there is a region 626 indicating GO (good) and NG (bad) as a result of the determination (to be described later) of the measured value in the model step 1. Although only meter 1 and meter 4 are used in this model step 1, six meters can be displayed in one model step as described above. In the next step 936, a WAIT time (which can be set in the range of 0 to 9.9 seconds) is set before the start of measurement, and a signal stabilization time is provided. In the following step 937, the measurement routine of FIG. 13 is entered, and when this is completed, it is determined in step 938 whether or not to continue the measurement by a measurement end flag (described later). If the flag is not set, step 939 is executed. In step 940, the model step number is incremented by 1, and it is determined in step 940 whether the step of the resulting model step number is the setting end. If not, return to step 931
Repeat the above process for the next model step.
On the other hand, if NO in step 938, or step 940
If YES is obtained (model step 15 in this example), this routine ends.

Next, the above measurement routine will be described with reference to FIG. At the first step 950, a key input is waited for, and the model step number is manually incremented by 1 in the manual STEP mode. If the [INC] key is not pressed, the routine proceeds from step 951 to step 952, and the AUTO STEP mode (automatic When model step feed is selected, the automatic model step feed time (0 to 9.9 in measurement mode)
Second) is reached. In the case of NO here, it is determined in step 953 whether or not the [START] key (which acts as an end key here) used when it is desired to forcibly terminate the measurement is operated. Measurement steps 954 to 963. First, in the first step 954, the meter number MN is set to 1, and in step 955, the measurement data is acquired. For model step 1, the measurement data is obtained from the output of the A / D converter 60. In the following step 956, it is determined whether or not the correction mode is turned on. If YES, in step 957, the measured data is compensated by correcting the measured data with error data (obtained in the self-calibration mode described later). To get After this or step 95
If NO in 6 (correction mode = OFF in this example), the measured data is saved in step 958, and step 95
At 9, the value of this measurement data is compared with an allowable range (-2 to 2 dB in this model step) that the user can arbitrarily set. If it is within the allowable range, it is GO, and if not, it is NG. This comparison result is stored in step 960, and in step 961, the measured data is displayed as a numerical value (0.0 dB in this model step) and the finger line 624 as shown in FIG. The result is displayed in the upper frame of the meter (however, a downward triangle is displayed only when NG). Next, in a decision step 962, it is checked whether or not the meter number is equal to 6 (the last meter number). If NO, the meter number is incremented by 1 in step 963, and the above steps 955 to 962 are repeated. Since the use of the meter numbers 2 and 3 is not selected, the steps 955 to 961 are skipped for these. Since the meter 4 is selected, substantial processing is performed in steps 955 to 961 and measurement data and determination results are displayed in step 961. For the latter meters 5 and 6, the meter 2
Similar to step 3, the result is YES in step 962 and the flow proceeds to step 962 ′, in which the model step comprehensive determination result, which is the sum of all determination results from meter 1 to meter 6, is displayed in the upper right area 626. Then, the process returns to step 950. This completes the measurement for model step 1.

Next, from the step 951 if there is an [INC] key input to advance to the next model step in the manual STEP mode, and from the step 952 if the automatic step feed time for the model step 1 in the AUTO STEP mode has expired. To Steps 964 and 965. Here, the model step comprehensive determination result is NG (for example, in the case of model step 8 in FIG. 17) and NG S
Step 9 only if TOP mode is set
Return to step 50 and indicate the end in step 953 [ST
Wait for the determination of pressing the [ART] key. If the result of this judgment is YES, the measurement end flag is set (ON) in step 967 and the routine exits. In this case, step 938 in FIG. 11 is NO, and further measurement is stopped. If necessary,
It is also possible to change the program so that the measurement of the model step after the model step in which the NG judgment is made is continued when the user gives an instruction. On the other hand, if NO in step 964 or NO in step 965 (NG
When the STOP mode is OFF), the present model step comprehensive judgment result is added to the model comprehensive judgment result in step 966, and then this routine is exited, and step 93 in FIG.
Go to 8. In this case, YES is obtained in step 938, and in the case of each of model steps 2 to 14, the process returns to step 931 through steps 939 and 940, and the steps 931 to 937 in FIG. 11 and the measurement routine in FIG. 13 are executed again. . In the case of model step 15, the process proceeds from step 940 to step 941 where the model comprehensive determination result is displayed. That is, when GO judgment is made in all model steps, the total judgment G shown in FIG.
If the screen is displayed as O and if the NG judgment is made even in one step, NG is displayed as the comprehensive judgment.
After that, the routine of FIG. 11 is terminated, and as a result, the process returns to the beginning of the measurement main routine of FIG.

FIGS. 14 to 19 show model steps 3 (MVCR), 5 (REF, HI, LO) similar to FIG.
W), 7 (MV, THD), 8 (REF, HI, SPE
D, WOW), 10 (MV S), 11 (DC) screen examples. FIG. 14 shows a channel separation measurement, in which the measured value of the leakage from CH-L to CH-R is displayed on the meter 4. Fig. 15 shows an example of the screen when all 6 meters are used.
The measurement results of one item are shown. FIG. 16 shows the millibar and distortion rate for each channel. FIG. 17 shows REF and HI measurement items for each channel, and SPED (which uses the counter 47) and W.
There are meter displays for the two items of OW. Also,
In this case, NG is displayed as described above. FIG.
Is a display example of the S / N ratio. FIG. 19 is a display example using the DMM unit 45.

Next, referring to FIG. 21, in the self-calibration mode, that is, [CAL] in the measurement main routine of FIG.
The case where the key is pressed and the process proceeds to step 923 will be described. First, in the first step, the measurement error inspection screen of FIG. 22 is displayed. In this screen, the upper right corner shows "C"
"AL" is displayed and the function key display used in the following is shown on the right side. Next, regarding the correction mode, [ON], [OFF], [CANCEL
Steps 971 and 97 are performed to determine whether the L key has been pressed.
Check at 3,976. When the [ON] key is pressed, the correction mode is turned on in step 972, and when the [OFF] key is pressed, the mode is turned off in step 974.
If it is set to F and both display ON / OFF of the correction mode in step 975, and if the [CANCEL] key is pressed, the error data is cleared in step 977, and the process returns to step 971. Step 971,
If NO in any of 973 and 976, step 9
Proceeding to step 78, if it is desired to stop and check at each model step and press the [CHECK STEP] key, the process proceeds from step 978 to steps 979,980. Here, set the manual STEP mode to AUTO ST
Clear the automatic model step feed time used in EP mode in all model steps. On the other hand, if you want to check all model steps automatically, [C
When the HECK AUTO] key is pressed, the process proceeds from step 981 to steps 982 and 983. At this time, AUTO
Set the STEP mode and set the automatic step feed time (usually 1 second) for all model steps. In any case, in step 986, the measurement determination reference value of each measurement item in all model steps is rewritten to the measurement error inspection determination reference value. In the following step 987, the WAIT time (for example, 1 second) for measurement of each model step is shortened (for example, 100 milliseconds) for the measurement error check. This is because it is not necessary to provide the stabilization time of the signal from the DUT. In addition, the NG STOP mode is set for all model steps. This is because the system B needs to be inspected, adjusted, repaired, etc. even if the NG appears in only one measurement item. Further, in this step, processing unnecessary for the measurement error inspection, for example, I / O control item is deleted. Steps 980, 983, 98
The processing in 6,987 is performed on the model measurement condition data read from the memory card in step 917 of FIG. 7, and as a result, model self-calibration condition data is generated. After this, the inspection subroutine of FIG. 23 is entered in step 989, and when this is completed, the routine returns to step 971 of the self-calibration main routine. When the [QUIT] key is pressed to end this self-calibration mode, the process proceeds from step 984 to step 985, where the model measurement condition data of the current model number is read from the memory card MC to obtain the self-calibration condition data. Set the original measurement condition data instead of. This exits the routine of FIG. 21 and returns to the measurement main routine of FIG.

Next, the inspection subroutine will be described with reference to FIG. In the first step 1000, set the model step number to 1 and then in step 10
In 01 to 1003, processing is performed according to the self-calibration condition data regarding the corresponding step. That is, step 1001
Then, the signal source is internally connected for self-calibration, that is, the switches 50, 51, 52, 53 are switched to the C position, and the switches 34,
Switching control of 35, 36 and 48 is performed, and step 1002 is performed.
In step 1003, control of the range of the measurement system, selection of filter characteristics, etc. is performed, and in step 1003, the signal source control routine of FIG. 24 is executed. In this signal source control routine, as will be described later, the signal source is controlled so as to generate a test signal having a level or frequency equivalent to the level or frequency to be measured, depending on the measurement item. Next, in step 1004, an inspection screen based on the measurement items of the model step is displayed.

FIG. 25 shows a model step 1 screen as an example of the inspection screen. As shown in FIG. 12, the inspection allowable ranges 640 and 642 corresponding to the inspection standard of the measuring instrument are shown in FIG.
Allowable range 62 for measurement corresponding to the product standard of the DUT
It is narrower than 2,623. Next, step 10
At 05, a WAIT time (for example, 100 milliseconds) before the start of inspection is set, and then at step 1006, the inspection routine of FIG. 26 (described later) is executed. Then step 1
In 007, if the inspection end flag (described later) is ON, Y
This becomes ES and ends this routine. On the other hand, if NO in step 1007, the model step number is incremented by 1 in step 1008 to prepare for the inspection of the next model step, and if this next model step is not the setting end step (in this example, steps 2 to 14). ), Step 1
If NO in step 009, the process loops to step 1001.
On the other hand, if YES in step 1009 (model step 15 in this example), the model comprehensive determination result is displayed in step 1010, and this routine ends.

27 to 32 are model steps 3, 5, 7, 8, 1 corresponding to the measurement screens of FIGS. 14 to 19, respectively.
It is an example of an inspection screen of 0 and 11.

Next, the above signal source control routine will be described with reference to FIG. First, step 1020
The type of the measurement item is checked in 1024, and in the case of the inspection regarding the AC level measurement, steps 1020 to 102
Go to 5. In the setting examples of FIGS. 5 and 6, as an example, FIG.
This is model step 1 shown in FIG. In this case, the meter display center value (ADJ) of the level measurement is set as the oscillator output level. This is convenient because it is not necessary to change the setting when the meter display center value is different from the oscillator output level. In the case of model step 1, the center value and the output level are equal to -5.0 dB. Next, in the case of the inspection regarding the S / N ratio measurement, the process proceeds from step 1021 to step 1026. For example, this is the case of the model step 10 shown in FIG. In this case, in step 1026, the meter display center value (eg, -10.0 dB) of the AC level measurement in the immediately preceding model step 9 (not shown) is set to the model step 10
A value (example: -20 dB) obtained by adding the central value of the S / N ratio of the meter (example: -10 dB) is set as the oscillator output level. Further, in the case of the inspection regarding the channel separation measurement, the process proceeds from step 1022 to step 1027. For example, this is the case of model step 3 shown in FIG. At step 1027, a value (example: -50) obtained by adding a separation meter display center value (example: -40 dB) to the reference channel side meter display center value (example: -10 dB).
dB) is set as the output of the oscillator.

Further, in the case of inspection relating to frequency measurement and tape speed measurement, for example, in the case of model step 8 shown in FIG. 30, steps 1023 to 1028 are performed.
Then, the frequency for measurement is set as the frequency of the oscillator here. Finally, in the case of the inspection regarding the frequency characteristic measurement, for example, in the case of the model step 5 shown in FIG. 28, the process proceeds from step 1024 to step 1029. here,
Center value of meter display for reference level measurement (Example: -10dB)
Is set as the oscillator output level. Further, the output of the oscillator is a three-wave mixture, and each frequency thereof is a frequency for measurement. This is the end of the signal source control routine. As can be seen from the above description, in this system,
Since the central value of the meter display is used as the data, the signal source can be controlled conveniently.

Next, with reference to FIG. 26, the inspection routine entered from step 1006 of FIG. 23 will be described. This inspection routine performs almost the same processing as the measurement routine of FIG. The difference is that in the inspection routine, the STEP mode in which the model step is manually advanced and the AUTO STEP mode in which the model step is automatically advanced are set in advance, so that the manual STEP mode is set (YES in step 1041) and the model step number is incremented by 1. Let [CHECK S
If the [TEP] key is not pressed (NO in step 1041), the process proceeds to step 1043. In step 1043, instead of the [START] key used in step 953,
A determination is made as to the [QUIT] key indicating the inspection stop, and in step 1057, the inspection end flag is set to O.
Set to N. Furthermore, in the inspection routine, there are no steps like steps 956 and 957 in FIG.
The measurement data is saved in step 6, and step 1047 is performed.
Then, the error data, which is the difference between the measured value and the input value or the target value, is stored to provide the error data in step 957 of FIG. Also, in step 1049,
Use the criterion value for measurement error inspection. Others are the same as the measurement routine of FIG. 13, and thus the description will be omitted. Model Step 1 This inspection routine displays the screen shown in FIG. Similarly, the other model steps 2 to 15 are similarly inspected, and as a result, the screens of FIGS. 27 to 32 are displayed. Incidentally, FIG. 29 shows the model step 7,
The determination result is an example of NG. In this case, step 9
Since the NG STOP mode is set to all steps in 87, the inspection cannot proceed to the model step 8 and subsequent steps. In addition, if necessary, NG when the user gives an instruction.
The program can be modified so that the model step after the determined model step is continuously checked. On the other hand, when the GO determination is made in all of the model steps 1 to 14, the comprehensive determination result GO shown in FIG. 33 is displayed in step 1010 of FIG. After this, the process exits the inspection subroutine and returns to the CAL main routine of FIG. 21, and when the [QUIT] key is pressed, the process returns to the beginning of the measurement main routine of FIG. 9 via steps 984 to 985.

The audio measuring system B, which is one embodiment of the present invention, has been described above in detail. The present invention, however, measures other measurement items in the audio system or measures equipment other than audio equipment. Can also be applied to.

[0053]

According to the multi-function measuring device of the present invention, since the external measuring device is not required to be connected, self-calibration of the multi-function measuring device can be easily and easily performed. Further, since the internal connection is automatically made in addition to the connection with the external measuring device, the inspection time can be shortened. Further, when self-calibration is performed at the same level / frequency as in the measurement mode, a part of the setting in the measurement mode can be used, so that the inspection time can be further shortened. Furthermore, since self-calibration can be performed by a simple operation, no expert is required and operability can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a multifunctional measuring device having a basic configuration according to the present invention.

FIG. 2 is a circuit block diagram showing an audio measuring system in which the multi-function measuring device of FIG. 1 is further embodied.

FIG. 3 is a flowchart showing a main routine executed by a CPU 90 of FIG.

FIG. 4 is a diagram showing a MENU screen displayed in the routine of FIG.

5 is a screen showing a part of model steps 1 to 15 of model 1 set / edited in the EDIT MENU subroutine of FIG. 3. FIG.

6 is a screen showing another part of model steps 1 to 15 of model 1 set / edited in the EDIT MENU subroutine of FIG. 3. FIG.

FIG. 7 is a flowchart detailing the measurement MENU routine of FIG.

8 is a diagram showing a measurement MENU screen displayed in the routine of FIG.

9 is a flowchart showing a measurement main routine that is entered from the routine of FIG.

10 is a diagram showing a measurement screen displayed in the routine of FIG.

FIG. 11 is a flowchart showing a measurement subroutine that is entered from the measurement main routine of FIG.

FIG. 12 is a diagram showing an example of a model step 1 (MV) screen displayed by the routines of FIGS. 11 and 13;

13 is a flowchart showing a measurement routine that is entered from the routine of FIG.

FIG. 14 is a model step 3 (MVC similar to FIG. 12;
The figure which shows the example of the screen of R).

FIG. 15 is a model step 5 (RE similar to FIG.
The figure which shows the example of the screen of (F, HI, LOW).

FIG. 16 is a model step 7 (MV, similar to FIG.
The figure which shows the example of the screen of (THD).

FIG. 17 is a model step 8 (RE similar to FIG.
The figure which shows the example of the screen of (F, HI, SPED, WOW).

FIG. 18 is a model step 10 (MV similar to FIG.
The figure which shows the example of the screen of S).

FIG. 19 is a model step 11 (D) similar to FIG.
The figure which shows the example of the screen of C).

20 is a diagram showing an example of a comprehensive determination result display screen displayed in the routine of FIG.

21 is a flowchart showing a self-calibration (CAL) main routine that is entered from the measurement main routine of FIG.

22 is a diagram showing a measurement error inspection screen displayed in the routine of FIG.

23 is a flowchart showing an inspection subroutine that is entered from the routine of FIG.

24 is a flowchart showing a signal source control routine that is entered from the routine of FIG.

FIG. 25 is a view showing an example of the inspection screen of model step 1 displayed in FIGS. 23 and 26.

FIG. 26 is a flowchart showing an inspection routine entered from the routine of FIG. 23.

FIG. 27 is a diagram showing an example of an inspection screen of model step 3 displayed in FIGS. 23 and 26.

FIG. 28 is a diagram showing an example of an inspection screen of model step 5 displayed in FIGS. 23 and 26.

FIG. 29 is a view showing an example of an inspection screen of model step 7 displayed in FIGS. 23 and 26.

FIG. 30 is a diagram showing an example of an inspection screen of model step 8 displayed in FIGS. 23 and 26.

FIG. 31 is a diagram showing an example of an inspection screen of model step 10 displayed in FIGS. 23 and 26.

FIG. 32 is a view showing an example of an inspection screen of model step 11 displayed in FIGS. 23 and 26.

FIG. 33 is a diagram showing an example of a display screen of comprehensive determination results displayed in the routine of FIG. 23.

[Explanation of symbols]

MD, MD ': DUT 1, 10, 12, 14: input terminals 2, 20: Output terminal 3: Signal source section 4: Instrument part 5: Connection part 6: Processing / judgment / display 7: Operation mode designation section 8: Measurement / self-calibration condition input section 9: Measurement / self-calibration control unit 620: Meter display section MN1 to MN6: Meter number 624, 625: finger line 622, 623: allowable range for measurement 640, 642: allowable range for inspection

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-5-26952 (JP, A) JP-A-3-277986 (JP, A) JP-A-5-135082 (JP, A) JP-A-64- 88262 (JP, A) JP 58-166498 (JP, A) Actual flat 3-61588 (JP, U) Actual flat 1-152216 (JP, U) Actual 62-135974 (JP, U) Actual Development Sho 60-179875 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01R 35/00-35/04 G01D 18/00

Claims (21)

(57) [Claims] 1. An input terminal (1; 10,12,14) and an output terminal (2; 20) having a plurality of measurement functions for performing a measurement on a plurality of parameters of a device under test (MD; MD '). ) And a multi-function measuring instrument (A; B) having a), and a) a plurality of single-function measuring means (3, 4; 30 to 38, 40 to 48), wherein the plurality of single function measuring means includes at least one test signal source means (SS1 to SSi; 30 to 33), each of the plurality of single function measuring means being an input and an output or an output. A plurality of single-function measuring means, and (b) connecting means (5; for connecting the input terminal, the output terminal, and each of the plurality of single-function measuring means).
50-53), and c) mode designating means (7; 70,903,922,924) for generating a mode designating signal for designating the measurement mode or the self-calibration mode of the multifunctional measuring instrument, and d) a control means responding to the mode designating signal (9; 90,9
32,988,1001), and wherein the mode designation signal designates the measurement mode, controlling the connection means to measure each of at least one parameter selected from the plurality of parameters. For connecting the plurality of single-function measuring means, the output terminal and the input terminal, and controlling the connecting means when the mode designating signal designates the self-calibration mode. Thereby connecting each of said single function measuring means relating to the measurement of each of said selected at least one parameter with said single function measuring means used for self-calibration of said means; Multi-function measuring instrument including. 2. The multi-function measuring device according to claim 1, wherein the plurality of single-function measuring means include the at least one test signal source means (SS1 to SSi; 30 to 33), an input and an output. And a plurality of measuring means (M1 to Mj; 41 to 47) each having a plurality of measuring means. 3. The multifunctional measuring instrument according to claim 2, further comprising: (a) means connected to the outputs of the plurality of instrument means, the output signals from each of the plurality of instrument means. Processing means (6; 60) for performing a process on the above to generate a first signal representing a measurement result, and (b) receiving the first signal and comparing the result with a predetermined judgment criterion to obtain a pass / fail judgment result. A judging means (6; 90,959,1049) for generating a second signal, and c) a display means (6; 90) for receiving the first signal or the second signal and displaying the measurement result or the quality judgment result. 9
0,941,961,1010,1051,62) and a multi-function measuring instrument. 4. The multi-function measuring device according to claim 3, further comprising means (8 ;; connected to the control means, for inputting measurement conditions in the measurement mode and inspection conditions in the self-calibration mode. 70, 90, 906), and the measurement and inspection conditions are, for each of the parameters, a measurement point and an inspection point, and a first measurement result that is the predetermined criterion.
Allowable range (622,623) and second allowable range of inspection results (640,6)
42) A multi-function measuring instrument comprising the above-mentioned input means including: 5. The multi-function measuring device according to claim 4, wherein, for each of the parameters, the inspection point in the self-calibration mode is the same as the measurement point in the measurement mode. Multi-function measuring instrument. 6. The multi-function measuring device according to claim 4, wherein the second allowable range of the inspection result is narrower than the first allowable range of the measurement result. 7. The multi-function measuring device according to claim 4, wherein, in the self-calibration mode, when the inspection result is within the second allowable range, the display means displays the parameter. If the single-function measuring means for measurement indicates good (GO), and if it is not within the second allowable range, the display means indicates that the single-function measuring means for measurement of the parameter is not good ( NG) indicating that the multifunctional measuring instrument. 8. The multi-function measuring device according to claim 7, wherein said input means specifies compensation means for compensating the characteristic of the corresponding single-function measuring means according to said inspection result (90,972,974). Wherein the control means is a compensating means (957) for compensating for the characteristics of each of the plurality of multi-function measuring means, wherein the inspection result is within the second allowable range and the measurement error is At a certain time, when the compensation designating means designates compensation, the compensating means compensates the characteristic of the corresponding single-function measuring means by using the measurement error. And a multi-function measuring instrument. 9. The multi-function measuring device according to claim 4, wherein the control means is further connected to the test signal source means, and generates a signal having the same value as the measured value point of the parameter. And a test signal source control means (1003) for controlling as described above. 10. The multi-function measuring device according to claim 1, wherein the control means further comprises, when the selected at least one parameter is two or more, the two or more parameters. Sequence means (1000, 1008, 100) for performing self-calibration for each of the
9), including, a multi-functional measuring instrument. 11. The multi-function measuring device according to claim 10, wherein said sequence means further comprises standby time setting means (936, 1005) for setting a predetermined standby time in measuring and inspecting each of said parameters. Including a multi-function measuring instrument. 12. The multi-function measuring device according to claim 11, wherein the standby time setting means is configured to inspect the parameter for a predetermined standby time, a first standby time in measuring each of the parameters. In (1), the second waiting time is set (987). 13. The multi-function measuring instrument according to claim 2, wherein the plurality of instrument means have circuits (40 to 44) common to each other. Multi-function measuring instrument. 14. An input terminal (1; 10,12,14) and an output terminal (2; 20) having a plurality of measurement functions for performing a measurement regarding a plurality of parameters of a device under test (MD; MD '). ) And a multi-function measuring instrument (A; B) having a), and a) a plurality of single-function measuring means (3, 4; 30 to 38, 40 to 48), wherein said plurality of single function measuring means comprises at least one test signal source means (SS1-SSi; 30-33) each having an output,
A plurality of instrument means (M1 to Mj; 41) each having an input and an output.
To 47), a plurality of the single function measuring means, and b) a connecting means (5) for connecting the input terminal, the output terminal, and each of the plurality of single function measuring means. ;
50-53), and c) mode designating means (7; 70,903,922,924) for generating a mode designating signal for designating the measurement mode or the self-calibration mode of the multifunctional measuring instrument, and d) the measurement conditions in the measurement mode and the self Means for inputting inspection conditions in calibration mode (8; 70,90,90
6), wherein the measurement condition and the inspection condition are, for each of the parameters, the measurement point and the inspection point, and the first allowable range (622,623) of the measurement result which is the predetermined criterion and the second allowable condition of the inspection result. And a control means (9; 90,932,988,1001) connected to the input means and responsive to the mode designating signal, the mode designating signal including the range (640,642) When the measurement mode is specified, the connection means is controlled to measure the plurality of single function measurement means and the plurality of single function measurement means for measuring each of the at least one selected parameter of the plurality of parameters. Make the connection between the output terminal and the input terminal,
When the mode designating signal designates the self-calibration mode, controlling the connecting means causes each of the measuring means relating to the measurement of each of the selected at least one parameter to be Connecting with said at least one test signal source means used for self-calibration,
The control means, and f) means connected to the outputs of the plurality of instrument means, the first signal representing the measurement result by processing the output signals from each of the plurality of instrument means. And a processing means (6; 60) for generating the following: (1) a judging means (6; 90,959) for receiving the first signal and comparing the result with a predetermined judgment criterion to generate a second signal indicating a pass / fail judgment result. 1049), and h) display means (6; 90, 9) for displaying the measurement result or the quality judgment result that receives the first signal or the second signal.
41,961,1010,1051,62), and in the self-calibration mode, when the inspection result is within the second allowable range, the measuring means for measuring the parameter is good. And the display means for indicating that the measuring means for measuring the parameter is not good when the measured value is not within the second allowable range. 15. The multi-function measuring device according to claim 14, wherein, for each of the parameters, the inspection point in the self-calibration mode is the same as the measurement point in the measurement mode. Multi-function measuring instrument. 16. The multi-function measuring device according to claim 14 or 15, wherein the input means further specifies compensation for the characteristic of the corresponding single-function measuring means according to the inspection result. The control means further includes a designating means (90, 972, 974), and the control means is a compensating means (957) for compensating the characteristics of each of the plurality of multi-function measuring means, and the inspection result is within the second allowable range. In addition, when there is a measurement error and the compensation designating unit designates compensation, the compensation unit compensates the characteristic of the corresponding single-function measuring unit using the measurement error. Including a multi-function measuring instrument. 17. The multifunctional measuring instrument according to claim 14, wherein the control means is further connected to the test signal source means, and is the same as the measurement value point of the parameter. A test signal source control means (1003) for controlling to generate a value signal. 18. The multi-function measuring device according to claim 14, wherein the control means further comprises two or more parameters when the selected at least one parameter is two or more. Sequence means (1000, 1008, 100) for performing self-calibration for each of the
9), including, a multi-functional measuring instrument. 19. The multi-function measuring device according to claim 18, wherein the sequence means is standby time setting means (936, 987, 1005) for setting a predetermined standby time in the measurement and inspection of each of the parameters. And the predetermined waiting time includes the waiting time setting means for setting a first waiting time in the measurement of each of the parameters and a second waiting time in the inspection of the parameter. A multi-function measuring instrument characterized by. 20. A multi-function measuring instrument (A; B) having a plurality of measuring functions for measuring a plurality of parameters of a device under test (MD; MD '), wherein at least one test signal source is provided. (SS1 to SSi; 30 to 33) and a plurality of single-function instrument means (M1 to Mj; 41 to 47), in a multifunctional measuring instrument, a calibration method for calibrating the plurality of instrument means is a) (1000) selecting any one of the plurality of instrument means, and (b) selecting one of the at least one test signal source means used to calibrate the selected instrument means. (1001) and (c) connecting the output of the selected test signal source means to the input of the selected instrument means, and obtaining a signal from the output of the instrument means (988,1045), d) The value of the signal from the output of the measuring device is set to a predetermined permission value including a reference value for the quality judgment. A step (1049) to be compared with the range, e) according to the result of the comparison, the calibration method comprising the step (1051) for displaying the acceptability judgment result. 21. The calibration method according to claim 20, further comprising: when the output signal value of the instrument means is within the predetermined allowable range and has an error from the reference value, the error is used. Compensating for characteristics of the selected instrument means (95
7) A calibration method characterized by including ,.