Some standard content:
Military Standard of the Electronic Industry of the People's Republic of China FL0150
SZ2 Radar Oscilloscope
Verification Regulation
SJ20229—93
Verification regulation of model SZ2radar oscilloscopes
1993[2-09 Issued
China Electronics Industry Corporation
1993—05—01 Implementation
Military Standard of the Electronic Industry of the People's Republic of China SZ2 Radar Oscilloscope
Verification Regulation
Verification regulation af modelSZ2 radar oscilloscopes
1 Scope
1.1 Subject Content
SJ20229—93
This verification procedure specifies the verification conditions, verification items, verification methods, verification result processing and verification cycle of SZ2 radar oscilloscopes. 1.2 Scope of Application
This verification procedure is applicable to the verification of radar oscilloscopes with bandwidth from DC to 15MHz. Dual-channel radar oscilloscopes or radar oscilloscopes with bandwidth greater than 15MHz can also be verified in accordance with this procedure.
Referenced Documents
There are no provisions in this chapter.
3 Definitions
There are no provisions in this chapter.
4 General requirements
1993--05--01 implementation
China Electronics Industry Corporation 1993-02-09 issued 1
TKAONKAca-
SJ20229-93
4.1 Purpose and principle of the inspected measuring instrument
SZ2 radar oscilloscope is a single-line fully transistorized pulse oscilloscope with a bandwidth of DC~15MHz. The sensitivity is 10mV/div, with a built-in 40mV square wave. The instrument itself can be self-calibrated, and the sweep speed is only eight gears, which is convenient for fast measurement of time: there are seven gears of internal dimming time scale and B-axis amplifier. The internal dimming has high sensitivity, the external dimming has a wide bandwidth, and the polarity is positive and negative. It can accurately measure the amplitude, frequency and phase relationship of the pulse signal on the radar. 4.2 Technical requirements
4.2.1 Vertical system
4.2.1.1 Deflection factor
10mV/div~10V/div, 10 levels in total: error ±5%, equipped with 10:1 attenuation probe, maximum input voltage 500V (DC+ACp-p). 4.2.1.2 Bandwidth
DC~15MHz (-3dB) (when the deflection factor is at the 10mV/div level), 4.2.1.3 Transient response
Rise time ≤24ns (when the deflection factor is at the 10mV/div level). Overshoot <5%, apparent delay time>50ms. 4.2.1.4 Input impedance
Direct input resistance 1MQ, capacitance ≤30pF, through probe resistance 10M0, capacitance 18pF.
4.2.2 Horizontal system
4.2.2.1 Deflection factor
≤1oV/di+expansion≤2V/div
4.2.2.2 Bandwidth
0~200kHz(-3dB).
4.2.2.3 Scanning time factor
0.1μs/div~0.5s/div, eight levels, error ±5%. Expansion 3~5 times, 0.1u/div error ±20%, the rest of the levels are ±5%.
4.2.2.4 Input impedance
SJ20229—93
Resistance ≥100k0, capacitance ≤30pF.
4.2.3 Trigger synchronization amplifier
4.2.3.1 Internal trigger
20Hz20MHz (sine or pulse) vertical display amplitude>10mm can trigger synchronization. Www.bzxZ.net
4.2.3.2 External trigger
DC~20MHz trigger signal amplitude in 0.5~20V-can trigger synchronization 4.2.4 Calibration signal
4.2.4.1 Voltage amplitude
40mV, error: 3%.
4.2.4.2 Repetition frequency
1kHz.
4.2.5 Time scale and Z-axis amplifier
4. 2. 5. 1, Time scale
0.05μs.0.1μs,1μs,10μs,0.1ms,1ms,10ms. Error: ±5% for 10ms, ±3% for the rest.
4.2.5.2 Z-axis amplifier
a. External modulation frequency: 100kHz～20MHz. b. Minimum modulation amplitude: 0.5Vb-pa
center. External modulation polarity: positive and negative variable.
4.3 Verification conditions
4.3.1 Environmental conditions
a. Environmental temperature: 20±2℃;
b. Relative humidity: 45%～75%;
c. Atmospheric pressure: 86~106kPas
d. Power supply: 220V±2%.50Hz±1%; e. Surrounding environment: no mechanical vibration and electromagnetic field interference that affect the normal operation of the instrument. 4.3.2 Verification equipment
See the table below.
TTKAONKAca-
Instrument name
Urine wave meter
Calibrator
Frequency signal
Generator
SJ20229—93
Main technical requirements
Ins, upstroke 5%
Time accuracy:
a. Reference time ≤= number
b, soil 3% deviation range: #±0.1%
(2±2℃)
(. Main 10% body difference range: ≤±0.5 %（）
Voltage
50mV or above±0.5%±5mgV
50mV or below:±0.5%±5mV
1H～1MHz+output impedance≤3kn
Output auxiliary degree0~5V
Distortion magic5%
High signal
1mkHz~30MHz, output impedance≤3kn.
Generator
Distortion<5%, open circuit output voltage0~1V
Quality
Milli-ohm meter
Voltmeter
Digital
Frequency Frequency
20Hz~1MHz, basic error +3%,
frequency error ≤5%
15kHz~50MHz, basic error ±3%
standard range, 10Hz~10mMHz
test stability: 1×10-8/
standard range: 50kHz~50MHz
capacitance measurement accuracy>100pF±1%
commercial frequency Q meter
<1pF±1pF
DC bridge
oscilloscope
resistance measurement accuracy±2%
new wide DC~ 20MHz, dual channel maximum sensitivity: ImVaiv
bandwidth 0~1MHz, some dual channel high sensitivity and high nitrogen
oscilloscope
electronic communication
voltage regulator
isolation
<20V/div. common mode ratio>1
output voltage: 2213
distortion is not more than 5%
stability accuracy: ±h5%
voltage regulation rate: soil 1%
reference model
SC-340
SC -7204
QBG-IALCR
QBG-1B4225
XJ—19
5 Detailed requirements
SJ20229—93
5.1 Verification items and verification methods
5.1.1 Appearance and normal working inspection
5.1.1.1 The oscilloscope under inspection shall be accompanied by the product technical manual and necessary accessories. If it is not the first verification, the previous verification certificate shall be attached
5.1.1.2 The oscilloscope under inspection shall not have mechanical damage that affects its reading and working performance. All knob switches shall be firm and reliable, with clear gears and accurate positioning. 5.1.1.3 After turning on the machine and preheating according to the instructions, adjust the brightness, focus and auxiliary focus knobs of the oscilloscope. The light spot should change evenly, with sufficient brightness and good focus.
5.1.1.4 Add the calibration signal to adjust the image so that the waveform is not distorted within the effective area of the oscilloscope screen.
5.1, 1.5 Set the input coupling of the oscilloscope under test to "ground". After "preheating", adjust the light spot to the center of the screen. Observe the vertical (horizontal) displacement of the light track (dot) over time within the time specified in the manual (generally 1 hour). 5.1.2 Verification of calibration signal
5.1.2.1 Calibration signal amplitude error
a. Amplitude verification method 1
Connect the measuring instrument according to Figure 1. Set the voltage output of the oscilloscope calibrator and the amplitude calibration signal of the oscilloscope under test to the same level, and feed them to the A and B input terminals of the high-sensitivity oscilloscope respectively (the deflection factor of the two channels is the same). Set the vertical working mode of the high-sensitivity oscilloscope to "A-B". At the same time, put the sweep time factor switch in the appropriate position, and the screen will display the waveform shown in Figure 2 (a) or (b). HKAONTKAca-
Oscilloscope is difficult to test
Voltage output
Tested oscilloscope
Standard signal output
SJ20229--93
High sensitivity oscilloscope
The two lines a and b reflect the difference in the amplitude of the two signals. Gradually increase the sensitivity of the high sensitivity oscilloscope and adjust the calibrator's \V deviation\ knob to make the two lines a and b coincide. At this time, the indicated value of the "V deviation" meter of the oscilloscope calibrator is the calibration signal amplitude correction value of the tested oscilloscope.
The verification results are recorded in Appendix A (Supplement) Table A6. b. Amplitude verification method 2
When the amplitude error of the calibration signal of the tested oscilloscope is ±3%, the verification can be carried out according to the method shown in Figure 3.
Oscilloscope Calibrator
SJ20229—3
Calibration Signal Output
Tested Oscilloscope
Set the voltage output of the oscilloscope calibrator and the calibration signal amplitude of the tested oscilloscope to the same level, set the vertical mode of the oscilloscope to "DC", and set the sensitivity switch to the appropriate position to keep the screen display amplitude at about 80% of the effective area. Turn the conversion switch S and fine-tune the "V Deviation\ knob of the calibrator to make the two signals on the screen consistent. At this time, the calibration signal amplitude error can be read from the calibrator's "V Deviation" header, and its error sign is equal to the opposite value of the header deviation. Record the verification result in Table A6. 5.1.2.2 Frequency Error Verification
Connect the measuring instrument according to Figure 4.
Rate Meter
Tested Oscilloscope
Calibration Signal Output
Record the frequency indicated by the frequency meter. The frequency error is calculated according to formula (1), and the result is recorded in Table A6.
×100%
Where: - is the nominal value of the repetition frequency of the calibration signal; (1)
TTKAONKAca-
SJ20229—93
f is the repetition frequency displayed by the frequency meter.
5.1.3 Verification of horizontal system
5.1.3.1 Scanning time factor error
Connect the measuring instrument according to Figure 5.
Oscilloscope calibrator
Time scale input
Matching resistor
Tested oscilloscope
The time scale signal output of the oscilloscope calibrator is fed to the Y-axis input terminal of the tested oscilloscope through the terminal matching resistor. The scan fine adjustment of the oscilloscope under test is set to the "standard" position so that the time scale output gear of the calibrator corresponds to the scan time factor of the oscilloscope under test. Adjust the "horizontal displacement" of the oscilloscope and the "T deviation" knob of the calibrator, and obtain a stable waveform of 8 cycles with the time scale peaks aligned with the vertical scale line within 80% of the length of the test working surface, as shown in Figure 6. At this time, the indicated value of the "T deviation" header of the calibrator is the scan time factor error, and its error sign is equal to the opposite value of the header deviation. Record the verification results in Table Al.
Display length
The scan time factor error after "expansion" still uses this method, and the apparent delay time is allowed to be deducted at this time.
When using a time-stamp signal generator whose cycle cannot be fine-tuned for calibration, the scan time factor reading error A
E-Ax10% can be calculated according to Figure 8
SI20229--93
? and formula (2) 2)
Scan time factor error
Where: A——80% of the length of the test working surface (horizontally): B——The display length corresponding to 8 period pulses of the time-stamp signal. 5.1-3.2 Trigger performance
a. Internal trigger performance
Connect the measuring instrument according to Figure 8.
Sine wave signal generator
Matching resistor
Tested oscilloscope
Feed the sine wave signal into the Y input terminal of the tested oscilloscope in the internal trigger state. Adjust the signal amplitude and oscilloscope sensitivity so that the amplitude displayed on the screen is equal to the minimum amplitude of the internal trigger required by the technology. Under the premise of maintaining the amplitude, change the signal frequency. The waveform should be able to be displayed stably in the high, medium and low segments within the bandwidth of the oscilloscope (adjustment of the "trigger level\, \stability" and change of the trigger selection"\ are allowed during the verification process). This item should be verified for the "+" and "\" trigger polarities respectively, and the verification results should be recorded in Table 9
TTKAONKAca-
A2.
b. External trigger performance
SJ20229-93
Connect the measuring instruments according to Figure 9,
signal generator
isolation attenuator
tested oscilloscope
external trigger
matching voltage
voltmeter
Feed the sine wave signal into the Y input scale and external trigger input terminal of the tested oscilloscope in the external trigger state through the isolation attenuator and matching resistor respectively, and monitor it with a voltmeter. Make the signal voltage equal to the minimum external trigger voltage specified in the manual (monitor with a voltmeter and calculate its peak-to-peak value), and the waveform at the high and low ends and the middle section within the bandwidth range of the oscilloscope should be able to be displayed stably (it is allowed to adjust the trigger level and "stability" and change the "trigger selection" during the verification process).
This item should be verified for "+", "-" trigger polarity respectively. Record the verification results in Table A2.
5.1.3.3 Verification of bandwidth
Perform verification in accordance with Article 5.1.4.3. In this case, change the height H to the length L. 5.1.3.4 Verification of deflection factor
Feed the voltage output of the oscilloscope calibrator to the X-axis input terminal of the oscilloscope under test. Perform verification in accordance with Article 5.1.4.1.
Record the verification results of Articles 5.1.3.3 and 5.1.3.4 in Table A3. 5.I.3. 5 Input impedance
SJ20229--93
Set the scanning band switch to "outside", and measure the X-axis input impedance according to the method in Article 5.1.4.4. Then set the trigger disk to "outside", and use the same method to measure the external trigger auxiliary input impedance, and record the verification results in Table A9
5.1.4 Verification of vertical system
5.1.4.1 Deflection factor error
. Connect the measuring instruments according to the diagram.
Oscilloscope alignment instrument
Tested oscilloscope
Set the gain adjustment of the tested oscilloscope to the "calibration" position, set the coupling mode to "DC", add the standard voltage U of the oscilloscope calibration instrument to the Y-axis input end, adjust the "voltage output" amplitude of the oscilloscope calibration instrument, and the displayed amplitude will be about 80% of the height of the inspection working surface. Read the displayed height H at this time and calculate it according to formulas (3) and (4). Sy
SmSr×100%
++**** (3)
5.+.+--..++.. (4)
Where: Sy—measured value of deflection factor, V/cm or V/tivSe—nominal value of deflection constant
sy—deflection factor error.
The deflection constant error can also be read directly from the "V Deviation\" meter of the oscilloscope calibrator, and the error sign is the opposite value of the reading. This test should be carried out at each deflection factor attenuation level. The test results are recorded in Table A. b. Probe attenuation ratio
TTKAONKAca-Amplitude verification method 1
Connect the measuring instrument according to Figure 1. Set the voltage output of the oscilloscope calibrator and the amplitude calibration signal of the oscilloscope under test to the same level, and feed them to the A and B input terminals of the high-sensitivity oscilloscope respectively (the deflection factor of the two channels is the same). Set the vertical working mode of the high-sensitivity oscilloscope to "A-B" and set the scanning time factor switch to the appropriate position. The screen will display the waveform shown in Figure 2 (a) or (b). HKAONTKAca-
Oscilloscope is difficult to measure
Voltage output
Oscilloscope under test
Standard signal output
SJ20229--93
High-sensitivity oscilloscope
The a and b lines reflect the difference in the amplitude of the two signals. Gradually increase the sensitivity of the high-sensitivity oscilloscope and adjust the calibrator\V deviation\ knob to make the a and b lines coincide. At this time, the indicated value of the "V deviation" meter of the oscilloscope calibrator is the calibration signal amplitude correction value of the tested oscilloscope.
The verification results are recorded in Appendix A (Supplement) Table A6. b. Amplitude verification method 2
When the amplitude error of the calibration signal of the tested oscilloscope is ±3%, the verification can be carried out according to the method shown in Figure 3.
Oscilloscope
SJ20229—3
Calibration signal output
Tested oscilloscope
Set the voltage output of the oscilloscope calibrator and the calibration signal amplitude of the tested oscilloscope to the same level, set the vertical closing mode of the oscilloscope to "DC", and set the sensitivity switch to the appropriate position to keep the screen display amplitude at about 80% of the effective area. Toggle the conversion switch S and fine-tune the "V deviation" knob of the calibrator to make the two signals have the same amplitude on the screen. At this time, the calibration signal amplitude error can be read from the "V Deviation" meter of the calibrator. The error sign is equal to the opposite value of the meter deviation. The verification result is recorded in Table A6. 5.1.2.2 Frequency Error Verification
Connect the measuring instrument as shown in Figure 4.
Rated rate meter
Received by the detector
calibration signal is compiled
Record the frequency indicated by the frequency meter. The frequency error is calculated according to formula (1) and the result is recorded in Table A6.
×100%
Where: -—nominal value of the calibration signal repetition frequency; (1)
TTKAONKAca-
SJ20229—93
f—The repetition frequency displayed by the rate meter.
5.1.3 Verification of the horizontal system
5.1.3.1 Scan time factor error
Connect the measuring instruments as shown in Figure 5.
Oscilloscope calibrator
Time scale input
Matching resistor
Tested oscilloscope
The time scale signal output of the oscilloscope calibrator is fed to the Y-axis input terminal of the tested oscilloscope through the terminal matching resistor. The scan fine adjustment of the tested oscilloscope is set to the "standard" position so that the time scale output gear of the calibrator corresponds to the scan time factor of the tested oscilloscope. Adjust the "horizontal displacement" of the oscilloscope ” and the calibrator “T Deviation” knob, within the range of 80% of the length of the inspection working surface, a stable waveform of 8 cycles with the time scale peaks aligned with the vertical scale line is obtained, as shown in Figure 6. At this time, the indication value of the calibrator “T Deviation” header is the scanning time factor error, and its error sign is equal to the opposite value of the header deviation. The verification results are recorded in Table Al.
Display length
The scanning time factor error after “expansion” still uses this method, and the apparent delay time is allowed to be deducted at this time.
When a time scale signal generator with a non-fine-tunable period is used for verification, the scanning time factor reading difference A
E-Ax10% can be calculated according to Figure 8
SI20229--93
? and formula (2). 2)
Scanning time factor error
Where: A——80% of the length of the test working surface (horizontally): B——the display length corresponding to 8 period pulses of the time scale signal. 5.1-3.2 Trigger performance
a. Internal trigger performance
Connect the measuring instrument according to Figure 8.
Sine wave signal generator
Matching resistor
Tested oscilloscope
Feed the sine wave signal into the Y input terminal of the tested oscilloscope in the internal trigger state. Adjust the signal amplitude and oscilloscope sensitivity so that the amplitude displayed on the screen is equal to the minimum amplitude of the internal trigger required by the technology. Under the premise of maintaining the amplitude, change the signal frequency. In the high, medium and low segments within the bandwidth range of the oscilloscope, the waveform should be able to be displayed stably (adjustment of "trigger level\,\stability" and change of trigger selection\ are allowed during the verification process). This item should be tested for "+" and "\" trigger polarities respectively, and the test results should be recorded in Table 9
TTKAONKAca-
A2
b. External trigger performance
SJ20229-93
Connect the measuring instruments according to Figure 9,
signal generator
isolation attenuator
tested oscilloscope
external trigger
matching voltage
voltmeter
Feed the sine wave signal into the Y input scale and external trigger input terminal of the tested oscilloscope in the external trigger state through the isolation attenuator and matching resistor respectively, and monitor it with a voltmeter. Make the signal voltage equal to the minimum external trigger voltage specified in the manual (monitor with a voltmeter and calculate its peak-to-peak value), and the waveform at the high and low ends and the middle section within the bandwidth range of the oscilloscope should be able to be stably displayed (the trigger level and "stability" can be adjusted and the "trigger selection" can be changed during the verification process).
This item should be verified for "+", "-" trigger polarity respectively. Record the verification results in Table A2
5.1.3.3 Bandwidth Verification
Reference to 5.1.4.3 for verification, at this time, change the height H to length L. 5.1.3.4 Deflection Factor Verification
Feed the voltage output of the oscilloscope calibrator to the X-axis input terminal of the oscilloscope under test. Refer to 5.1.4.1 for verification.
Record the verification results of 5.1.3.3 and 5.1.3.4 in Table A3. 5.I.3. 5 Input Impedance
SJ20229--93
Set the scanning band switch to "External", and measure the X-axis input impedance according to the method in 5.1.4.4. Then set the trigger plate to "External", and use the same method to measure the external trigger auxiliary input impedance, and record the verification results in Table A9.
5.1.4 Verification of vertical system
5.1.4.1 Deflection factor error
. Connect the measuring instruments according to the diagram.
Oscilloscope alignment instrument
Tested oscilloscope
Set the gain adjustment of the tested oscilloscope to the "calibration" position, set the coupling mode to "DC", add the standard voltage U of the oscilloscope calibration instrument to the Y-axis input terminal, adjust the "voltage output" amplitude of the oscilloscope calibration instrument, and the displayed amplitude will be about 80% of the height of the inspection working surface. Read the displayed height H at this time and calculate according to formulas (3) and (4). Sy
SmSr×100%
++**** (3)
5.+.+--..++.. (4)
Where: Sy—measured value of deflection factor, V/cm or V/tivSe—nominal value of deflection constant
sy—deflection factor error.
The deflection constant error can also be read directly from the "V deviation\ table of the oscilloscope calibrator, and the error sign is the opposite value of the reading. This test should be carried out at each deflection factor attenuation level. The test results are recorded in Table A. b. Probe attenuation ratio
TTKAONKAca-Amplitude verification method 1
Connect the measuring instrument according to Figure 1. Set the voltage output of the oscilloscope calibrator and the amplitude calibration signal of the oscilloscope under test to the same level, and feed them to the A and B input terminals of the high-sensitivity oscilloscope respectively (the deflection factor of the two channels is the same). Set the vertical working mode of the high-sensitivity oscilloscope to "A-B" and set the scanning time factor switch to the appropriate position. The screen will display the waveform shown in Figure 2 (a) or (b). HKAONTKAca-
Oscilloscope is difficult to measure
Voltage output
Oscilloscope under test
Standard signal output
SJ20229--93
High-sensitivity oscilloscope
The a and b lines reflect the difference in the amplitude of the two signals. Gradually increase the sensitivity of the high-sensitivity oscilloscope and adjust the calibrator\V deviation\ knob to make the a and b lines coincide. At this time, the indicated value of the "V deviation" meter of the oscilloscope calibrator is the calibration signal amplitude correction value of the tested oscilloscope.
The verification results are recorded in Appendix A (Supplement) Table A6. b. Amplitude verification method 2
When the amplitude error of the calibration signal of the tested oscilloscope is ±3%, the verification can be carried out according to the method shown in Figure 3.
Oscilloscope
SJ20229—3
Calibration signal output
Tested oscilloscope
Set the voltage output of the oscilloscope calibrator and the calibration signal amplitude of the tested oscilloscope to the same level, set the vertical closing mode of the oscilloscope to "DC", and set the sensitivity switch to the appropriate position to keep the screen display amplitude at about 80% of the effective area. Toggle the conversion switch S and fine-tune the "V deviation" knob of the calibrator to make the two signals have the same amplitude on the screen. At this time, the calibration signal amplitude error can be read from the "V Deviation" meter of the calibrator. The error sign is equal to the opposite value of the meter deviation. The verification result is recorded in Table A6. 5.1.2.2 Frequency Error Verification
Connect the measuring instrument as shown in Figure 4.
Rated rate meter
Received by the detector
calibration signal is compiled
Record the frequency indicated by the frequency meter. The frequency error is calculated according to formula (1) and the result is recorded in Table A6.
×100%
Where: -—nominal value of the calibration signal repetition frequency; (1)
TTKAONKAca-
SJ20229—93
f—The repetition frequency displayed by the rate meter.
5.1.3 Verification of the horizontal system
5.1.3.1 Scan time factor error
Connect the measuring instruments as shown in Figure 5.
Oscilloscope calibrator
Time scale input
Matching resistor
Tested oscilloscope
The time scale signal output of the oscilloscope calibrator is fed to the Y-axis input terminal of the tested oscilloscope through the terminal matching resistor. The scan fine adjustment of the tested oscilloscope is set to the "standard" position so that the time scale output gear of the calibrator corresponds to the scan time factor of the tested oscilloscope. Adjust the "horizontal displacement" of the oscilloscope ” and the calibrator “T Deviation” knob, within the range of 80% of the length of the inspection working surface, a stable waveform of 8 cycles with the time scale peaks aligned with the vertical scale line is obtained, as shown in Figure 6. At this time, the indication value of the calibrator “T Deviation” header is the scanning time factor error, and its error sign is equal to the opposite value of the header deviation. The verification results are recorded in Table Al.
Display length
The scanning time factor error after “expansion” still uses this method, and the apparent delay time is allowed to be deducted at this time.
When a time scale signal generator with a non-fine-tunable period is used for verification, the scanning time factor reading difference A
E-Ax10% can be calculated according to Figure 8
SI20229--93
? and formula (2). 2)
Scanning time factor error
Where: A——80% of the length of the test working surface (horizontally): B——the display length corresponding to 8 period pulses of the time scale signal. 5.1-3.2 Trigger performance
a. Internal trigger performance
Connect the measuring instrument according to Figure 8.
Sine wave signal generator
Matching resistor
Tested oscilloscope
Feed the sine wave signal into the Y input terminal of the tested oscilloscope in the internal trigger state. Adjust the signal amplitude and oscilloscope sensitivity so that the amplitude displayed on the screen is equal to the minimum amplitude of the internal trigger required by the technology. Under the premise of maintaining the amplitude, change the signal frequency. In the high, medium and low segments within the bandwidth range of the oscilloscope, the waveform should be able to be displayed stably (adjustment of "trigger level\,\stability" and change of trigger selection\ are allowed during the verification process). This item should be tested for "+" and "\" trigger polarities respectively, and the test results should be recorded in Table 9
TTKAONKAca-
A2
b. External trigger performance
SJ20229-93
Connect the measuring instruments according to Figure 9,
signal generator
isolation attenuator
tested oscilloscope
external trigger
matching voltage
voltmeter
Feed the sine wave signal into the Y input scale and external trigger input terminal of the tested oscilloscope in the external trigger state through the isolation attenuator and matching resistor respectively, and monitor it with a voltmeter. Make the signal voltage equal to the minimum external trigger voltage specified in the manual (monitor with a voltmeter and calculate its peak-to-peak value), and the waveform at the high and low ends and the middle section within the bandwidth range of the oscilloscope should be able to be stably displayed (the trigger level and "stability" can be adjusted and the "trigger selection" can be changed during the verification process).
This item should be verified for "+", "-" trigger polarity respectively. Record the verification results in Table A2
5.1.3.3 Bandwidth Verification
Reference to 5.1.4.3 for verification, at this time, change the height H to length L. 5.1.3.4 Deflection Factor Verification
Feed the voltage output of the oscilloscope calibrator to the X-axis input terminal of the oscilloscope under test. Refer to 5.1.4.1 for verification.
Record the verification results of 5.1.3.3 and 5.1.3.4 in Table A3. 5.I.3. 5 Input Impedance
SJ20229--93
Set the scanning band switch to "External", and measure the X-axis input impedance according to the method in 5.1.4.4. Then set the trigger plate to "External", and use the same method to measure the external trigger auxiliary input impedance, and record the verification results in Table A9.
5.1.4 Verification of vertical system
5.1.4.1 Deflection factor error
. Connect the measuring instruments according to the diagram.
Oscilloscope alignment instrument
Tested oscilloscope
Set the gain adjustment of the tested oscilloscope to the "calibration" position, set the coupling mode to "DC", add the standard voltage U of the oscilloscope calibration instrument to the Y-axis input terminal, adjust the "voltage output" amplitude of the oscilloscope calibration instrument, and the displayed amplitude will be about 80% of the height of the inspection working surface. Read the displayed height H at this time and calculate according to formulas (3) and (4). Sy
SmSr×100%
++**** (3)
5.+.+--..++.. (4)
Where: Sy—measured value of deflection factor, V/cm or V/tivSe—nominal value of deflection constant
sy—deflection factor error.
The deflection constant error can also be read directly from the "V deviation\ table of the oscilloscope calibrator, and the error sign is the opposite value of the reading. This test should be carried out at each deflection factor attenuation level. The test results are recorded in Table A. b. Probe attenuation ratio
TTKAONKAca-2 Frequency error verification
Connect the measuring instruments as shown in Figure 4.
Rated frequency meter
Receive the calibration signal from the detector
Record the frequency indicated by the frequency meter. Calculate the frequency error according to formula (1) and record the result in Table A6.
×100%
Where: -—nominal value of the calibration signal repetition frequency; (1)
TTKAONKAca-
SJ20229—93
f—repetition frequency displayed by the frequency meter.
5.1.3 Verification of horizontal system
5.1.3.1 Scanning time factor error
Connect the measuring instruments as shown in Figure 5.
Oscilloscope Calibrator
Time-scale input
Matching resistor
Tested oscilloscope
The time-scale signal output of the oscilloscope calibrator is fed to the Y-axis input terminal of the tested oscilloscope through the terminal matching resistor. The scan fine adjustment of the tested oscilloscope is set to the "standard" position, so that the time-scale output gear of the calibrator corresponds to the scan time factor of the tested oscilloscope. Adjust the "horizontal displacement" of the oscilloscope and the "T deviation" knob of the calibrator, and obtain a stable waveform of 8 cycles with the time-scale peaks aligned with the vertical scale line within the range of 80% of the length of the inspection working surface, as shown in Figure 6. At this time, the indicated value of the "T deviation" meter header of the calibrator is the scan time factor error, and its error sign is equal to the opposite value of the meter header deviation. Record the verification results in Table Al.
Display length
The scan time factor error after "expansion" still uses this method, and the apparent delay time is allowed to be deducted at this time.
When using a time-stamp signal generator whose cycle cannot be fine-tuned for calibration, the scan time factor reading error A
E-Ax10% can be calculated according to Figure 8
SI20229--93
? and formula (2) 2)
Scan time factor error
Where: A——80% of the length of the test working surface (horizontally): B——The display length corresponding to 8 period pulses of the time-stamp signal. 5.1-3.2 Trigger performance
a. Internal trigger performance
Connect the measuring instrument according to Figure 8.
Sine wave signal generator
Matching resistor
Tested oscilloscope
Feed the sine wave signal into the Y input terminal of the tested oscilloscope in the internal trigger state. Adjust the signal amplitude and oscilloscope sensitivity so that the amplitude displayed on the screen is equal to the minimum amplitude of the internal trigger required by the technology. Under the premise of maintaining the amplitude, change the signal frequency. The waveform should be able to be displayed stably in the high, medium and low segments within the bandwidth of the oscilloscope (adjustment of the "trigger level\, \stability" and change of the trigger selection"\ are allowed during the verification process). This item should be verified for the "+" and "\" trigger polarities respectively, and the verification results should be recorded in Table 9
TTKAONKAca-
A2.
b. External trigger performance
SJ20229-93
Connect the measuring instruments according to Figure 9,
signal generator
isolation attenuator
tested oscilloscope
external trigger
matching voltage
voltmeter
Feed the sine wave signal into the Y input scale and external trigger input terminal of the tested oscilloscope in the external trigger state through the isolation attenuator and matching resistor respectively, and monitor it with a voltmeter. Make the signal voltage equal to the minimum external trigger voltage specified in the manual (monitor with a voltmeter and calculate its peak-to-peak value), and the waveform at the high and low ends and the middle section within the bandwidth range of the oscilloscope should be able to be displayed stably (it is allowed to adjust the trigger level and "stability" and change the "trigger selection" during the verification process).
This item should be verified for "+", "-" trigger polarity respectively. Record the verification results in Table A2.
5.1.3.3 Verification of bandwidth
Perform verification in accordance with Article 5.1.4.3. In this case, change the height H to the length L. 5.1.3.4 Verification of deflection factor
Feed the voltage output of the oscilloscope calibrator to the X-axis input terminal of the oscilloscope under test. Perform verification in accordance with Article 5.1.4.1.
Record the verification results of Articles 5.1.3.3 and 5.1.3.4 in Table A3. 5.I.3. 5 Input impedance
SJ20229--93
Set the scanning band switch to "outside", and measure the X-axis input impedance according to the method in Article 5.1.4.4. Then set the trigger disk to "outside", and use the same method to measure the external trigger auxiliary input impedance, and record the verification results in Table A9
5.1.4 Verification of vertical system
5.1.4.1 Deflection factor error
. Connect the measuring instruments according to the diagram.
Oscilloscope alignment instrument
Tested oscilloscope
Set the gain adjustment of the tested oscilloscope to the "calibration" position, set the coupling mode to "DC", add the standard voltage U of the oscilloscope calibration instrument to the Y-axis input end, adjust the "voltage output" amplitude of the oscilloscope calibration instrument, and the displayed amplitude will be about 80% of the height of the inspection working surface. Read the displayed height H at this time and calculate it according to formulas (3) and (4). Sy
SmSr×100%
++**** (3)
5.+.+--..++.. (4)
Where: Sy—measured value of deflection factor, V/cm or V/tivSe—nominal value of deflection constant
sy—deflection factor error.
The deflection constant error can also be read directly from the "V Deviation\" meter of the oscilloscope calibrator, and the error sign is the opposite value of the reading. This test should be carried out at each deflection factor attenuation level. The test results are recorded in Table A. b. Probe attenuation ratio
TTKAONKAca-2 Frequency error verification
Connect the measuring instruments as shown in Figure 4.
Rated frequency meter
Receive the calibration signal from the detector
Record the frequency indicated by the frequency meter. Calculate the frequency error according to formula (1) and record the result in Table A6.
×100%
Where: -—nominal value of the calibration signal repetition frequency; (1)
TTKAONKAca-
SJ20229—93
f—repetition frequency displayed by the frequency meter.
5.1.3 Verification of horizontal system
5.1.3.1 Scanning time factor error
Connect the measuring instruments as shown in Figure 5.
Oscilloscope Calibrator
Time-scale input
Matching resistor
Tested oscilloscope
The time-scale signal output of the oscilloscope calibrator is fed to the Y-axis input terminal of the tested oscilloscope through the terminal matching resistor. The scan fine adjustment of the tested oscilloscope is set to the "standard" position, so that the time-scale output gear of the calibrator corresponds to the scan time factor of the tested oscilloscope. Adjust the "horizontal displacement" of the oscilloscope and the "T deviation" knob of the calibrator, and obtain a stable waveform of 8 cycles with the time-scale peaks aligned with the vertical scale line within the range of 80% of the length of the inspection working surface, as shown in Figure 6. At this time, the indicated value of the "T deviation" meter header of the calibrator is the scan time factor error, and its error sign is equal to the opposite value of the meter header deviation. Record the verification results in Table Al.
Display length
The scan time factor error after "expansion" still uses this method, and the apparent delay time is allowed to be deducted at this time.
When using a time-stamp signal generator whose cycle cannot be fine-tuned for calibration, the scan time factor reading error A
E-Ax10% can be calculated according to Figure 8
SI20229--93
? and formula (2) 2)
Scan time factor error
Where: A——80% of the length of the test working surface (horizontally): B——The display length corresponding to 8 period pulses of the time-stamp signal. 5.1-3.2 Trigger performance
a. Internal trigger performance
Connect the measuring instrument according to Figure 8.
Sine wave signal generator
Matching resistor
Tested oscilloscope
Feed the sine wave signal into the Y input terminal of the tested oscilloscope in the internal trigger state. Adjust the signal amplitude and oscilloscope sensitivity so that the amplitude displayed on the screen is equal to the minimum amplitude of the internal trigger required by the technology. Under the premise of maintaining the amplitude, change the signal frequency. The waveform should be able to be displayed stably in the high, medium and low segments within the bandwidth of the oscilloscope (adjustment of the "trigger level\, \stability" and change of the trigger selection"\ are allowed during the verification process). This item should be verified for the "+" and "\" trigger polarities respectively, and the verification results should be recorded in Table 9
TTKAONKAca-
A2.
b. External trigger performance
SJ20229-93
Connect the measuring instruments according to Figure 9,
signal generator
isolation attenuator
tested oscilloscope
external trigger
matching voltage
voltmeter
Feed the sine wave signal into the Y input scale and external trigger input terminal of the tested oscilloscope in the external trigger state through the isolation attenuator and matching resistor respectively, and monitor it with a voltmeter. Make the signal voltage equal to the minimum external trigger voltage specified in the manual (monitor with a voltmeter and calculate its peak-to-peak value), and the waveform at the high and low ends and the middle section within the bandwidth range of the oscilloscope should be able to be displayed stably (it is allowed to adjust the trigger level and "stability" and change the "trigger selection" during the verification process).
This item should be verified for "+", "-" trigger polarity respectively. Record the verification results in Table A2.
5.1.3.3 Verification of bandwidth
Perform verification in accordance with Article 5.1.4.3. In this case, change the height H to the length L. 5.1.3.4 Verification of deflection factor
Feed the voltage output of the oscilloscope calibrator to the X-axis input terminal of the oscilloscope under test. Perform verification in accordance with Article 5.1.4.1.
Record the verification results of Articles 5.1.3.3 and 5.1.3.4 in Table A3. 5.I.3. 5 Input impedance
SJ20229--93
Set the scanning band switch to "outside", and measure the X-axis input impedance according to the method in Article 5.1.4.4. Then set the trigger disk to "outside", and use the same method to measure the external trigger auxiliary input impedance, and record the verification results in Table A9
5.1.4 Verification of vertical system
5.1.4.1 Deflection factor error
. Connect the measuring instruments according to the diagram.
Oscilloscope alignment instrument
Tested oscilloscope
Set the gain adjustment of the tested oscilloscope to the "calibration" position, set the coupling mode to "DC", add the standard voltage U of the oscilloscope calibration instrument to the Y-axis input end, adjust the "voltage output" amplitude of the oscilloscope calibration instrument, and the displayed amplitude will be about 80% of the height of the inspection working surface. Read the displayed height H at this time and calculate it according to formulas (3) and (4). Sy
SmSr×100%
++**** (3)
5.+.+--..++.. (4)
Where: Sy—measured value of deflection factor, V/cm or V/tivSe—nominal value of deflection constant
sy—deflection factor error.
The deflection constant error can also be read directly from the "V Deviation\" meter of the oscilloscope calibrator, and the error sign is the opposite value of the reading. This test should be carried out at each deflection factor attenuation level. The test results are recorded in Table A. b. Probe attenuation ratio
TTKAONKAca-External trigger performance
SJ20229-93
Connect the measuring instruments according to Figure 9,
signal generator
isolation attenuator
tested oscilloscope
external trigger
matching voltage
voltmeter
Feed the sine wave signal into the Y input scale and external trigger input terminal of the tested oscilloscope in the external trigger state through the isolation attenuator and matching resistor respectively, and monitor it with a voltmeter. Make the signal voltage equal to the minimum external trigger voltage specified in the manual (monitor with a voltmeter and calculate its peak-to-peak value), and the waveform at the high and low ends and the middle section within the bandwidth range of the oscilloscope should be able to be displayed stably (adjustment of the trigger level and "stability" and change of "trigger selection" are allowed during the verification process).
This item should be verified for "+", "-" trigger polarity respectively. Record the verification results in Table A2.
5.1.3.3 Verification of bandwidth
Perform verification in accordance with Article 5.1.4.3. In this case, change the height H to the length L. 5.1.3.4 Verification of deflection factor
Feed the voltage output of the oscilloscope calibrator to the X-axis input terminal of the oscilloscope under test. Perform verification in accordance with Article 5.1.4.1.
Record the verification results of Articles 5.1.3.3 and 5.1.3.4 in Table A3. 5.I.3. 5 Input impedance
SJ20229--93
Set the scanning band switch to "outside", and measure the X-axis input impedance according to the method in Article 5.1.4.4. Then set the trigger disk to "outside", and use the same method to measure the external trigger auxiliary input impedance, and record the verification results in Table A9
5.1.4 Verification of vertical system
5.1.4.1 Deflection factor error
. Connect the measuring instruments according to the diagram.
Oscilloscope alignment instrument
Tested oscilloscope
Set the gain adjustment of the tested oscilloscope to the "calibration" position, set the coupling mode to "DC", add the standard voltage U of the oscilloscope calibration instrument to the Y-axis input end, adjust the "voltage output" amplitude of the oscilloscope calibration instrument, and the displayed amplitude will be about 80% of the height of the inspection working surface. Read the displayed height H at this time and calculate it according to formulas (3) and (4). Sy
SmSr×100%
++**** (3)
5.+.+--..++.. (4)
Where: Sy—measured value of deflection factor, V/cm or V/tivSe—nominal value of deflection constant
sy—deflection factor error.
The deflection constant error can also be read directly from the "V Deviation\" meter of the oscilloscope calibrator, and the error sign is the opposite value of the reading. This test should be carried out at each deflection factor attenuation level. The test results are recorded in Table A. b. Probe attenuation ratio
TTKAONKAca-External trigger performance
SJ20229-93
Connect the measuring instruments according to Figure 9,
signal generator
isolation attenuator
tested oscilloscope
external trigger
matching voltage
voltmeter
Feed the sine wave signal into the Y input scale and external trigger input terminal of the tested oscilloscope in the external trigger state through the isolation attenuator and matching resistor respectively, and monitor it with a voltmeter. Make the signal voltage equal to the minimum external trigger voltage specified in the manual (monitor with a voltmeter and calculate its peak-to-peak value), and the waveform at the high and low ends and the middle section within the bandwidth range of the oscilloscope should be able to be displayed stably (adjustment of the trigger level and "stability" and change of "trigger selection" are allowed during the verification process).
This item should be verified for "+", "-" trigger polarity respectively. Record the verification results in Table A2.
5.1.3.3 Verification of bandwidth
Perform verification in accordance with Article 5.1.4.3. In this case, change the height H to the length L. 5.1.3.4 Verification of deflection factor
Feed the voltage output of the oscilloscope calibrator to the X-axis input terminal of the oscilloscope under test. Perform verification in accordance with Article 5.1.4.1.
Record the verification results of Articles 5.1.3.3 and 5.1.3.4 in Table A3. 5.I.3. 5 Input impedance
SJ20229--93
Set the scanning band switch to "outside", and measure the X-axis input impedance according to the method in Article 5.1.4.4. Then set the trigger disk to "outside", and use the same method to measure the external trigger auxiliary input impedance, and record the verification results in Table A9
5.1.4 Verification of vertical system
5.1.4.1 Deflection factor error
. Connect the measuring instruments according to the diagram.
Oscilloscope alignment instrument
Tested oscilloscope
Set the gain adjustment of the tested oscilloscope to the "calibration" position, set the coupling mode to "DC", add the standard voltage U of the oscilloscope calibration instrument to the Y-axis input end, adjust the "voltage output" amplitude of the oscilloscope calibration instrument, and the displayed amplitude will be about 80% of the height of the inspection working surface. Read the displayed height H at this time and calculate it according to formulas (3) and (4). Sy
SmSr×100%
++**** (3)
5.+.+--..++.. (4)
Where: Sy—measured value of deflection factor, V/cm or V/tivSe—nominal value of deflection constant
sy—deflection factor error.
The deflection constant error can also be read directly from the "V Deviation\" meter of the oscilloscope calibrator, and the error sign is the opposite value of the reading. This test should be carried out at each deflection factor attenuation level. The test results are recorded in Table A. b. Probe attenuation ratio
TTKAONKAca-
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.