Some standard content:
Military standard of the electronics industry of the People's Republic of China FL0150
SI20246--93
Verification regulation of
HF digital phase meter
1993-02-09 Issued
China Electronics Industry Corporation
Implementation on 1993-05-01
Military standard of the electronics industry of the People's Republic of China Verification regulation of
HF digital phase meter
1 Scope
1.1 Subject content
SJ2024693
This verification regulation specifies the verification conditions, verification items, verification methods, verification result processing and verification cycle of high-frequency phase meters. 1.2 Scope of application
This verification procedure is applicable to the verification of HP8405A high-frequency phase meter. Other types of commercial frequency phase meters (such as HP8408A, ZPV-F2, DT1, BX13A, BX23.XPD-1, XPD-2, XPD·3, etc.) can be verified by referring to this procedure 2 Reference documents
No clauses in this chapter.
3 Definitions
No clauses in this chapter.
4 General requirements
4.1 Purpose and principle of the measuring instrument to be tested China Electronics Industry Corporation Issued on February 9, 1993 Implementation on May 1, 1993 TTKAONKAa-
SJ20246—93
The basic principle of the high-frequency phase meter is shown in Figure 1, which consists of a channel (R, T), a phase detector and a readout circuit. Combined with signal source and test device, it can measure the phase and amplitude characteristics of high-frequency network, and is widely used in radar, navigation, measurement and control, and communication and broadcasting projects. 4
4.2 Technical requirements
4.2.1 Frequency range
Channel (R)
Channel (T)
1~1000MHz.
4. 2. 2 Input impedance
100kf// 2. 5pF.
4.2. 3 Maximum input voltage
AC: 2Vp;
DC: ±50V.
4.2.4 Isolation between the input and output terminals
When the frequency is ≤500MHz: ≥100dB;
When the frequency is >500MHz: ≥80dB
4.2.$ Voltage measurement accuracy (Vz=V=100mV) When the frequency is 1~100MHz, ±3%;
When the frequency is 100~300MHz: ±6%;
When the frequency is 300~1000MHz: ±12%.
4.2.6 Ratio (T/R) amplitude measurement accuracy Frequency 1~200MHz: =0.2dB-60~0dB): ±0.5dB (—70dB, +10dB):
Frequency 200~1000MHz: ±0.2dB (—60~-10dB): ±0.5dB (—70dB.odB).
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±1.5dB (+10dB).
4.2.7 Phase measurement accuracy (V=Vs=100mV) ±1.5°
4-2.8 Amplitude phase characteristic (100MHz, V--1000mV) ±4. 5°(V^=1~1000mV)
4.3 Verification conditions
4.3.1 Environmental conditions
a. Ambient temperature: 20±2'℃;
b. Relative humidity: 45%~75%;
c. Atmospheric pressure: 86~106kPa;
d. Power supply, 220V±2%, 50Hz±1%; e. Surrounding environment: no mechanical vibration and electromagnetic field interference that may affect normal operation. 4.3.2 Calibration equipment
4.3.2.1 Standard delay line
Time delay: 83~125ns;bzxz.net
Reference model: AD5120A.
4.3.2.2 High-frequency signal generator
Frequency range: 1~1000MHz
Frequency accuracy: ±1×10~
Output level: Vmar22Vms3
Reference model: HP8640B, HP8662A. 4.3.2.3 High-frequency voltmeter
Frequency range: 1~300MHz;
Accuracy: ±1% (after calibration correction);
Reference model: PM-30R.
4. 3. 2. 4 Power meter
Frequency range: 1～1000MHz!
Power range: 1gW~100mW;
TTKAONKACa-
Accuracy: ±3%:
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Reference model: HP436A, HP8482A.
4.3.2.5 Standard attenuator
Frequency range: 1～1000MHz:
Attenuation range: 0~80dB
Accuracy: ±0.02dB/10dB
Reference model: DPVP.
4.3.2.6 Power divider
Frequency range: 1~1000MHz;
Depth: 6dB;
VSWR: ≤1.1;
Reference model: HP11549A
4. 3.2. 7 Probe tee
Frequency range: 1~1000MHz
VSWR: ≤1.1
Reference model: HP11536A.
4.3.2.8 Standard load
Frequency range: 1~1000MHz:
Impedance: 500,
VSWR: ≤1.05,
Reference model: HP908A.
5 Detailed requirements
5. 1 Verification items and verification methods
5.1.1 Appearance and normal working condition inspection
5.1. 1.1 The high-frequency phase meter under inspection (hereinafter referred to as the inspected instrument) shall be accompanied by a product manual. If it is not the first time to be inspected, the previous verification certificate shall be attached. 5.1.1.2 The inspected instrument shall have no mechanical damage that affects its normal operation and correct reading. 4
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Switches, buttons, knobs, meters and displays shall work properly. 5.1.1.3 After being powered on and preheated for 30 minutes, the inspected instrument can be phase locked at any frequency within its working frequency band and at any specified input level. Then, set the "phase range" to ±180°.
5.1.2 Channel isolation verification
5.1.2.1 Connect the instrument according to Figure 2, adjust the frequency of the high-frequency signal generator to 500MHz, and adjust the signal amplitude to the minimum.
High-frequency signal
Generator
Probe tee
500 load
Tested instrument
500 load probe tee
5.1.2.2 Set the "Channel selection" of the tested instrument to the reference channel (R), and the "Amplitude range" to 1000mV (10tB). Gradually increase the output amplitude of the high-frequency signal generator to make the tested instrument phase locked. The input signal amplitude V of the reference channel (R) is 1000mV. 5.1.2.3 Set the "Channel selection" of the tested instrument to the test channel (T), and the "Amplitude range" to 0.JmV (70dB), and record the V reading at this time. 5.1.2.4 Calculate the channel isolation 9 according to formula (1) and record the verification results in Table A1 of Appendix A (Supplement).
β=20Lg
+*+*** (1)
5.1.2.5 Adjust the signal generator frequency to 1000MHz, repeat 5.1.2.2 to 5.1.2.4, and record the verification results in Table A1. 5.1.2.6 Adjust the signal amplitude back to the minimum. 5.1.3 Voltage amplitude measurement accuracy verification
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5.1.3.1 Connect the instrument according to Figure 3. Adjust the high-frequency signal generator frequency to 100MHz. Meiyan Yingchuang No.
Generator
Medical meter
Probe Lantong
500 load
Power juice
Skin detector
Operating head must pass 500 load
5.1.3.2 Set the "Channel Selection" of the instrument under test to the reference channel (R), and gradually increase the signal amplitude to lock the phase of the instrument under test. Carefully adjust the signal amplitude so that the reading of the RF voltmeter is 100mV (after calibration), and record the phase meter reading V at this time. 5.1.3.3 Remove the RF voltmeter, connect the probe T of the instrument under test (with the three-way connection and load), and fine-tune the signal amplitude so that the reading V of the instrument under test is the same as that in 5.1.3.2.
5.1.3.4 Set the "Channel Selection" of the instrument under test to test (T), and set the "Amplitude Range" to 100mV (-10dB). Record the V reading, calculate the error according to formula (2), and record the result in Table A2.
V1-100×100%
5.1.3.5 Adjust the signal frequency to 300MHz, repeat 5.1.3.2 to 5.1.3.4, and record the result in Table A2.
5.1.3.6 Adjust the signal amplitude back to the minimum.
5.1.3.7 Remove the probe T of the instrument under test and connect it to the power meter (including the power head). 5.1.3.8 Set the "channel selection" of the instrument under test to reference (R), adjust the signal frequency to 1000MHz, and gradually increase the signal amplitude to make the instrument under test phase locked. Finely adjust the signal amplitude: make the power meter reading 0.2mW, and record the V reading of the instrument under test at this time. 6
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5.1.3.9 Remove the power meter and connect the probe T of the instrument under test. Fine-tune the signal amplitude to make the Vs reading the same as that of 5.1.3.8.
5.1. 3. 19 Repeat 5. 1. 3. 4. Record the results in Table A2 5.1.3.11 Adjust the signal amplitude back to the minimum. 5.1.4 Ratio (T/R) measurement accuracy verification 5.1.4.1 Connect the instrument according to Figure 4. Adjust the frequency of the high-frequency signal generator to 1MHz. Adjust the standard attenuator to 10dL,
High frequency signal
Generator
RF amplifier
50% negative trim
Play accurate driving line
Standard attenuator
Chopstick head three-way 0! Load
5.1.4.2 Set the channel selection of the instrument under test to reference (R), and the amplitude range to 1000mV (+10dB). Adjust the signal amplitude. Make the V reading of the instrument under test 1000mV.
5.1.4.3 Set the channel selection of the instrument under test to test (T), and record the Vi reading at this time.
5.1.4.4 Increase the attenuation of the standard attenuator in 10dB steps until it reaches 7UdB. Then return to UdB. Note the corresponding reading V of the instrument under test. Calculate the corresponding 8 value according to formula (1) and record the result in Table A3. 5.1.4.5 Adjust the signal frequency to 200MHz. Adjust the standard attenuator to 10dH. Repeat 5.1.4.2 to 5.1.4.4. Record the verification results in Table A3. 7
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5.1.4.6 Adjust the signal frequency to 1000MHz and the standard attenuator to 20dB. Repeat 5. 1. 4. 2 to 5. 1. 4. 4 and record the verification results in Table A3. 5.1.5 Phase measurement accuracy verification
5.1.5.1 In Figure 4, remove the standard attenuator and connect the standard delay line. 5.1.5.2 Adjust the signal frequency to f, (MHz). Adjust the signal amplitude to make V~ 100mV and the phase of the instrument under test is locked. Carefully adjust the phase readout circuit of the instrument under test to obtain a reliable and accurate phase indication 9 (deg), then slowly reduce the signal frequency to keep the phase of the instrument under test locked, observe the change in the phase indication, and when the phase indication is equal to (2π master 9), record the signal frequency f at this time. Calculate the delay difference between the test channel (T) and the reference channel (R) according to formula (3). Ar
Where: When f>f, take \+\ sign: f1>f, take "-\ sign. 5.1.5.3 Set the signal frequency and obtain the standard phase according to formulas (4) and (5). f=f:- 12- Ar
where n is 0.1..-12
and is 180°
5.1.5.4According to the settings and calculation results of formulas (4) and (5), gradually change the signal frequency F (pay attention to keep the phase lock of the instrument under test) and the standard phase shift intensity, record the corresponding phase indication 9 of the instrument under test, and calculate the phase measurement error Apg
according to formula (6) where: —phase indication of the instrument under test: —set standard position.
5.1.5.5Record fi, fe, 9, Ar, f, 99 and A values in Table A4. 5.1.5.6f , 10.500 and 1000MHz respectively, △ is preferably 100ns, repeat 5.1.5.2 to 5.1.5.5. Record the test results in Table A4. 8
5.1.6 Amplitude and phase characteristics test
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5.1.6.1 In Figure 4, connect the standard attenuator between the standard delay line and the probe of the test channel (I) of the instrument under test.
5.1.6.2 Set the standard attenuator to 0dB. Set the channel selection of the instrument under test to test (T): set the amplitude range to 1000mV (+10dB). Adjust the signal frequency to 100MHz, increase the signal amplitude, make the instrument under test phase locked, and make its V reading 1000mV.
5.1.6.3 Carefully adjust the key of the instrument under test to obtain a reliable and accurate phase indication 9, slowly reduce the signal frequency (keep the instrument under test phase locked), and observe the change of the phase indication. When 9 is:
99-±2 yuan
Record the corresponding signal frequency f. Calculate △t according to formula (3). 5.1.6.4 Gradually increase the attenuation of the standard attenuator in 10dB steps until it reaches 60dB. Repeat 5.1.6.3 to calculate Az. 5.1.6.5 Calculate the additional delay introduced by the standard attenuator at different attenuations and its corresponding phase shift according to formulas (7) and (8), and record the results in Table A5. dt;-At;At, *
89: 2 yuan f5
+**(7)
: (8)
is 0, 1,...6 and corresponds to the attenuation. Wuzhong
5.1.6.6 Adjust the signal frequency back to 10CMHz, and the standard attenuator starts from 0dB. Increment by 10dB. Then gradually increase to 60dB. Record the corresponding phase indication of the instrument under test 95.1.6.7 Calculate the amplitude-phase characteristic error according to formula (9) and record the result in Table A5. Api =pi + Bp. ..
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for the high-frequency phase meter that has passed the verification; for the one that fails the verification, a verification result notice shall be issued and the unqualified items shall be noted. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 9
TTTKAON KAca
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Appendix A
Verification record table format
(Supplement)
Table A!Channel isolation verification
Voltage amplitude measurement accuracy verification
Nominal value
Actual signal
Ratio (T/R) measurement accuracy verification
Standard attenuator retention
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Phase measurement accuracy verification
150:18621024027301330|360
TKAONTKAca-8 Set the "Channel Selection" of the instrument under test to reference (R), adjust the signal frequency to 1000MHz, and gradually increase the signal amplitude to make the instrument under test phase locked. Finely adjust the signal amplitude: make the power meter reading 0.2mW, and record the V reading of the instrument under test at this time. 6
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5.1.3.9 Remove the power meter. Connect the probe T of the instrument under test. Fine-tune the signal amplitude to make the Vs reading the same as that of 5.1.3.8.
5.1. 3. 19 Repeat 5. 1. 3. 4. Record the results in Table A2 5.1.3.11 Adjust the signal amplitude back to the minimum. 5.1.4 Ratio (T/R) measurement accuracy verification 5.1.4.1 Connect the instrument according to Figure 4. Adjust the frequency of the high-frequency signal generator to 1MHz. Adjust the standard attenuator to 10dL,
High frequency signal
Generator
RF amplifier
50% negative trim
Play accurate driving line
Standard attenuator
Chopstick head three-way 0! Load
5.1.4.2 Set the channel selection of the instrument under test to reference (R), and the amplitude range to 1000mV (+10dB). Adjust the signal amplitude. Make the V reading of the instrument under test 1000mV.
5.1.4.3 Set the channel selection of the instrument under test to test (T), and record the Vi reading at this time.
5.1.4.4 Increase the attenuation of the standard attenuator in 10dB steps until it reaches 7UdB. Then return to UdB. Note the corresponding reading V of the instrument under test. Calculate the corresponding 8 value according to formula (1) and record the result in Table A3. 5.1.4.5 Adjust the signal frequency to 200MHz. Adjust the standard attenuator to 10dH. Repeat 5.1.4.2 to 5.1.4.4. Record the verification results in Table A3. 7
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5.1.4.6 Adjust the signal frequency to 1000MHz and the standard attenuator to 20dB. Repeat 5. 1. 4. 2 to 5. 1. 4. 4 and record the verification results in Table A3. 5.1.5 Phase measurement accuracy verification
5.1.5.1 In Figure 4, remove the standard attenuator and connect the standard delay line. 5.1.5.2 Adjust the signal frequency to f, (MHz). Adjust the signal amplitude to make V~ 100mV and the phase of the instrument under test is locked. Carefully adjust the phase readout circuit of the instrument under test to obtain a reliable and accurate phase indication 9 (deg), then slowly reduce the signal frequency to keep the phase of the instrument under test locked, observe the change in the phase indication, and when the phase indication is equal to (2π master 9), record the signal frequency f at this time. Calculate the delay difference between the test channel (T) and the reference channel (R) according to formula (3). Ar
Where: When f>f, take \+\ sign: f1>f, take "-\ sign. 5.1.5.3 Set the signal frequency and obtain the standard phase according to formulas (4) and (5). f=f:- 12- Ar
where n is 0.1..-12
and is 180°
5.1.5.4According to the settings and calculation results of formulas (4) and (5), gradually change the signal frequency F (pay attention to keep the phase lock of the instrument under test) and the standard phase shift intensity, record the corresponding phase indication 9 of the instrument under test, and calculate the phase measurement error Apg
according to formula (6) where: —phase indication of the instrument under test: —set standard position.
5.1.5.5Record fi, fe, 9, Ar, f, 99 and A values in Table A4. 5.1.5.6f , 10.500 and 1000MHz respectively, △ is preferably 100ns, repeat 5.1.5.2 to 5.1.5.5. Record the test results in Table A4. 8
5.1.6 Amplitude and phase characteristics test
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5.1.6.1 In Figure 4, connect the standard attenuator between the standard delay line and the probe of the test channel (I) of the instrument under test.
5.1.6.2 Set the standard attenuator to 0dB. Set the channel selection of the instrument under test to test (T): set the amplitude range to 1000mV (+10dB). Adjust the signal frequency to 100MHz, increase the signal amplitude, make the instrument under test phase locked, and make its V reading 1000mV.
5.1.6.3 Carefully adjust the key of the instrument under test to obtain a reliable and accurate phase indication 9, slowly reduce the signal frequency (keep the instrument under test phase locked), and observe the change of the phase indication. When 9 is:
99-±2 yuan
Record the corresponding signal frequency f. Calculate △t according to formula (3). 5.1.6.4 Gradually increase the attenuation of the standard attenuator in 10dB steps until it reaches 60dB. Repeat 5.1.6.3 to calculate Az. 5.1.6.5 Calculate the additional delay introduced by the standard attenuator at different attenuations and its corresponding phase shift according to formulas (7) and (8), and record the results in Table A5. dt;-At;At, *
89: 2 yuan f5
+**(7)
: (8)
is 0, 1,...6 and corresponds to the attenuation. Wuzhong
5.1.6.6 Adjust the signal frequency back to 10CMHz, and the standard attenuator starts from 0dB. Increment by 10dB. Then gradually increase to 60dB. Record the corresponding phase indication of the instrument under test 95.1.6.7 Calculate the amplitude-phase characteristic error according to formula (9) and record the result in Table A5. Api =pi + Bp. ..
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for the high-frequency phase meter that has passed the verification; for the one that fails the verification, a verification result notice shall be issued and the unqualified items shall be noted. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 9
TTTKAON KAca
SJ2024693
Appendix A
Verification record table format
(Supplement)
Table A!Channel isolation verification
Voltage amplitude measurement accuracy verification
Nominal value
Actual signal
Ratio (T/R) measurement accuracy verification
Standard attenuator retention
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Phase measurement accuracy verification
150:18621024027301330|360
TKAONTKAca-8 Set the "Channel Selection" of the instrument under test to reference (R), adjust the signal frequency to 1000MHz, and gradually increase the signal amplitude to make the instrument under test phase locked. Finely adjust the signal amplitude: make the power meter reading 0.2mW, and record the V reading of the instrument under test at this time. 6
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5.1.3.9 Remove the power meter. Connect the probe T of the instrument under test. Fine-tune the signal amplitude to make the Vs reading the same as that of 5.1.3.8.
5.1. 3. 19 Repeat 5. 1. 3. 4. Record the results in Table A2 5.1.3.11 Adjust the signal amplitude back to the minimum. 5.1.4 Ratio (T/R) measurement accuracy verification 5.1.4.1 Connect the instrument according to Figure 4. Adjust the frequency of the high-frequency signal generator to 1MHz. Adjust the standard attenuator to 10dL,
High frequency signal
Generator
RF amplifier
50% negative trim
Play accurate driving line
Standard attenuator
Chopstick head three-way 0! Load
5.1.4.2 Set the channel selection of the instrument under test to reference (R), and the amplitude range to 1000mV (+10dB). Adjust the signal amplitude. Make the V reading of the instrument under test 1000mV.
5.1.4.3 Set the channel selection of the instrument under test to test (T), and record the Vi reading at this time.
5.1.4.4 Increase the attenuation of the standard attenuator in 10dB steps until it reaches 7UdB. Then return to UdB. Note the corresponding reading V of the instrument under test. Calculate the corresponding 8 value according to formula (1) and record the result in Table A3. 5.1.4.5 Adjust the signal frequency to 200MHz. Adjust the standard attenuator to 10dH. Repeat 5.1.4.2 to 5.1.4.4. Record the verification results in Table A3. 7
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5.1.4.6 Adjust the signal frequency to 1000MHz and the standard attenuator to 20dB. Repeat 5. 1. 4. 2 to 5. 1. 4. 4 and record the verification results in Table A3. 5.1.5 Phase measurement accuracy verification
5.1.5.1 In Figure 4, remove the standard attenuator and connect the standard delay line. 5.1.5.2 Adjust the signal frequency to f, (MHz). Adjust the signal amplitude to make V~ 100mV and the phase of the instrument under test is locked. Carefully adjust the phase readout circuit of the instrument under test to obtain a reliable and accurate phase indication 9 (deg), then slowly reduce the signal frequency to keep the phase of the instrument under test locked, observe the change in the phase indication, and when the phase indication is equal to (2π master 9), record the signal frequency f at this time. Calculate the delay difference between the test channel (T) and the reference channel (R) according to formula (3). Ar
Where: When f>f, take \+\ sign: f1>f, take "-\ sign. 5.1.5.3 Set the signal frequency and obtain the standard phase according to formulas (4) and (5). f=f:- 12- Ar
where n is 0.1..-12
and is 180°
5.1.5.4According to the settings and calculation results of formulas (4) and (5), gradually change the signal frequency F (pay attention to keep the phase lock of the instrument under test) and the standard phase shift intensity, record the corresponding phase indication 9 of the instrument under test, and calculate the phase measurement error Apg
according to formula (6) where: —phase indication of the instrument under test: —set standard position.
5.1.5.5Record fi, fe, 9, Ar, f, 99 and A values in Table A4. 5.1.5.6f , 10.500 and 1000MHz respectively, △ is preferably 100ns, repeat 5.1.5.2 to 5.1.5.5. Record the test results in Table A4. 8
5.1.6 Amplitude and phase characteristics test
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5.1.6.1 In Figure 4, connect the standard attenuator between the standard delay line and the probe of the test channel (I) of the instrument under test.
5.1.6.2 Set the standard attenuator to 0dB. Set the channel selection of the instrument under test to test (T): set the amplitude range to 1000mV (+10dB). Adjust the signal frequency to 100MHz, increase the signal amplitude, make the instrument under test phase locked, and make its V reading 1000mV.
5.1.6.3 Carefully adjust the key of the instrument under test to obtain a reliable and accurate phase indication 9, slowly reduce the signal frequency (keep the instrument under test phase locked), and observe the change of the phase indication. When 9 is:
99-±2 yuan
Record the corresponding signal frequency f. Calculate △t according to formula (3). 5.1.6.4 Gradually increase the attenuation of the standard attenuator in 10dB steps until it reaches 60dB. Repeat 5.1.6.3 to calculate Az. 5.1.6.5 Calculate the additional delay introduced by the standard attenuator at different attenuations and its corresponding phase shift according to formulas (7) and (8), and record the results in Table A5. dt;-At;At, *
89: 2 yuan f5
+**(7)
: (8)
is 0, 1,...6 and corresponds to the attenuation. Wuzhong
5.1.6.6 Adjust the signal frequency back to 10CMHz, and the standard attenuator starts from 0dB. Increment by 10dB. Then gradually increase to 60dB. Record the corresponding phase indication of the instrument under test 95.1.6.7 Calculate the amplitude-phase characteristic error according to formula (9) and record the result in Table A5. Api =pi + Bp. ..
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for the high-frequency phase meter that has passed the verification; for the one that fails the verification, a verification result notice shall be issued and the unqualified items shall be noted. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 9
TTTKAON KAca
SJ2024693
Appendix A
Verification record table format
(Supplement)
Table A!Channel isolation verification
Voltage amplitude measurement accuracy verification
Nominal value
Actual signal
Ratio (T/R) measurement accuracy verification
Standard attenuator retention
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Phase measurement accuracy verification
150:18621024027301330|360
TKAONTKAca-5.1 In Figure 4, remove the standard attenuator and connect the standard delay line. 5.1.5.2 Adjust the signal rate to f, (MHz). Adjust the signal amplitude to make V~ 100mV and the phase of the instrument under test is locked. Carefully adjust the phase readout circuit of the instrument under test to obtain a reliable and accurate phase indication 9 (deg), then slowly reduce the signal frequency to keep the phase of the instrument under test locked, observe the change in the phase indication, and when the phase indication is equal to (2π master 9), record the signal frequency f at this time. Calculate the delay difference between the test channel (T) and the reference channel (R) according to formula (3). Ar
In the formula: when f>f, take \+\ sign: f1>f, take "-\ sign. 5.1.5.3 Set the signal frequency and obtain the standard phase according to formulas (4) and (5). f=f:- 12- Ar
where n is 0.1..-12
and is 180°
5.1.5.4According to the settings and calculation results of formulas (4) and (5), gradually change the signal frequency F (pay attention to keep the phase lock of the instrument under test) and the standard phase shift intensity, record the corresponding phase indication 9 of the instrument under test, and calculate the phase measurement error Apg
according to formula (6) where: —phase indication of the instrument under test: —set standard position.
5.1.5.5Record fi, fe, 9, Ar, f, 99 and A values in Table A4. 5.1.5.6f , 10.500 and 1000MHz respectively, △ is preferably 100ns, repeat 5.1.5.2 to 5.1.5.5. Record the test results in Table A4. 8
5.1.6 Amplitude and phase characteristics test
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5.1.6.1 In Figure 4, connect the standard attenuator between the standard delay line and the probe of the test channel (I) of the instrument under test.
5.1.6.2 Set the standard attenuator to 0dB. Set the channel selection of the instrument under test to test (T): set the amplitude range to 1000mV (+10dB). Adjust the signal frequency to 100MHz, increase the signal amplitude, make the instrument under test phase locked, and make its V reading 1000mV.
5.1.6.3 Carefully adjust the key of the instrument under test to obtain a reliable and accurate phase indication 9, slowly reduce the signal frequency (keep the instrument under test phase locked), and observe the change of the phase indication. When 9 is:
99-±2 yuan
Record the corresponding signal frequency f. Calculate △t according to formula (3). 5.1.6.4 Gradually increase the attenuation of the standard attenuator in 10dB steps until it reaches 60dB. Repeat 5.1.6.3 to calculate Az. 5.1.6.5 Calculate the additional delay introduced by the standard attenuator at different attenuations and its corresponding phase shift according to formulas (7) and (8), and record the results in Table A5. dt;-At;At, *
89: 2 yuan f5
+**(7)
: (8)
is 0, 1,...6 and corresponds to the attenuation. Wuzhong
5.1.6.6 Adjust the signal frequency back to 10CMHz, and the standard attenuator starts from 0dB. Increment by 10dB. Then gradually increase to 60dB. Record the corresponding phase indication of the instrument under test 95.1.6.7 Calculate the amplitude-phase characteristic error according to formula (9) and record the result in Table A5. Api =pi + Bp. ..
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for the high-frequency phase meter that has passed the verification; for the one that fails the verification, a verification result notice shall be issued and the unqualified items shall be noted. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 9
TTTKAON KAca
SJ2024693
Appendix A
Verification record table format
(Supplement)
Table A!Channel isolation verification
Voltage amplitude measurement accuracy verification
Nominal value
Actual signal
Ratio (T/R) measurement accuracy verification
Standard attenuator retention
SJ20246-93
Phase measurement accuracy verification
150:18621024027301330|360
TKAONTKAca-5.1 In Figure 4, remove the standard attenuator and connect the standard delay line. 5.1.5.2 Adjust the signal rate to f, (MHz). Adjust the signal amplitude to make V~ 100mV and the phase of the instrument under test is locked. Carefully adjust the phase readout circuit of the instrument under test to obtain a reliable and accurate phase indication 9 (deg), then slowly reduce the signal frequency to keep the phase of the instrument under test locked, observe the change in the phase indication, and when the phase indication is equal to (2π master 9), record the signal frequency f at this time. Calculate the delay difference between the test channel (T) and the reference channel (R) according to formula (3). Ar
In the formula: when f>f, take \+\ sign: f1>f, take "-\ sign. 5.1.5.3 Set the signal frequency and obtain the standard phase according to formulas (4) and (5). f=f:- 12- Ar
where n is 0.1..-12
and is 180°
5.1.5.4According to the settings and calculation results of formulas (4) and (5), gradually change the signal frequency F (pay attention to keep the phase lock of the instrument under test) and the standard phase shift intensity, record the corresponding phase indication 9 of the instrument under test, and calculate the phase measurement error Apg
according to formula (6) where: —phase indication of the instrument under test: —set standard position.
5.1.5.5Record fi, fe, 9, Ar, f, 99 and A values in Table A4. 5.1.5.6f , 10.500 and 1000MHz respectively, △ is preferably 100ns, repeat 5.1.5.2 to 5.1.5.5. Record the test results in Table A4. 8
5.1.6 Amplitude and phase characteristics test
SJ20246—93
5.1.6.1 In Figure 4, connect the standard attenuator between the standard delay line and the probe of the test channel (I) of the instrument under test.
5.1.6.2 Set the standard attenuator to 0dB. Set the channel selection of the instrument under test to test (T): set the amplitude range to 1000mV (+10dB). Adjust the signal frequency to 100MHz, increase the signal amplitude, make the instrument under test phase locked, and make its V reading 1000mV.
5.1.6.3 Carefully adjust the key of the instrument under test to obtain a reliable and accurate phase indication 9, slowly reduce the signal frequency (keep the instrument under test phase locked), and observe the change of the phase indication. When 9 is:
99-±2 yuan
Record the corresponding signal frequency f. Calculate △t according to formula (3). 5.1.6.4 Gradually increase the attenuation of the standard attenuator in 10dB steps until it reaches 60dB. Repeat 5.1.6.3 to calculate Az. 5.1.6.5 Calculate the additional delay introduced by the standard attenuator at different attenuations and its corresponding phase shift according to formulas (7) and (8), and record the results in Table A5. dt;-At;At, *
89: 2 yuan f5
+**(7)
: (8)
is 0, 1,...6 and corresponds to the attenuation. Wuzhong
5.1.6.6 Adjust the signal frequency back to 10CMHz, and the standard attenuator starts from 0dB. Increment by 10dB. Then gradually increase to 60dB. Record the corresponding phase indication of the instrument under test 95.1.6.7 Calculate the amplitude-phase characteristic error according to formula (9) and record the result in Table A5. Api =pi + Bp. ..
5.2 Verification result processing and verification cycle
5.2.1 A verification certificate shall be issued for the high-frequency phase meter that has passed the verification; for the one that fails the verification, a verification result notice shall be issued and the unqualified items shall be noted. 5.2.2 The verification cycle is one year, and it can be sent for inspection at any time if necessary. 9
TTTKAON KAca
SJ2024693
Appendix A
Verification record table format
(Supplement)
Table A!Channel isolation verification
Voltage amplitude measurement accuracy verification
Nominal value
Actual signal
Ratio (T/R) measurement accuracy verification
Standard attenuator retention
SJ20246-93
Phase measurement accuracy verification
150:18621024027301330|360
TKAONTKAca-
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