140 Keysight N9927-90001 User’s Guide
Calibration for NA, CAT, and VVM Modes
Verifying Calibration and Jumper Cable Integrity
Verifying Calibration and Jumper Cable Integrity
After calibrating, it is important to verify that the calibration is good. When
using a jumper cable, also verify that the cable is of high quality.
Verify a Calibration
— Connect a LOAD standard at the calibration reference plane (where
calibration standards were connected). This may be at the end of the
jumper cable or at FieldFox
PORT 1
connector.
— In CAT Mode, select
Return Loss
.
— In NA Mode, select
S11
with Log Mag format.
— For frequencies
lower than 9 GHz
, observe the trace on the FieldFox
screen:
— Lower than 35 dB indicates a GOOD calibration.
— Higher than 30 dB indicates that you should recalibrate.
Verifying Phase Accuracy
— Connect a LOAD standard at the calibration reference plane (where
calibration standards were connected).
— In NA Mode, select a S11 Reflection with Polar or Smith Chart format.
— Because all LOAD standards have delay, you should see a small amount of
phase rotation as a function of frequency. In general, the measurement
result should agree with the characteristics of the calibration standard.
Test the Jumper Cable
With the LOAD standard still connected, move the jumper cable while
observing the trace.
— If the measurement trace is relatively stable, the jumper cable is of good
quality.
— If you observe significant movement in the peaks of the measurement trace
when moving the cable (>5 dB), the jumper cable may need to be replaced.
Содержание N9913A
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Страница 56: ...56 Keysight N9927 90001 User s Guide CAT Cable and Antenna Test Mode 2 Port Insertion Loss Measurements ...
Страница 82: ...82 Keysight N9927 90001 User s Guide TDR Time Domain Reflectometry Option 215 TDR Measurement Settings ...
Страница 106: ...106 Keysight N9927 90001 User s Guide NA Network Analyzer Mode NA Mode Settings ...
Страница 142: ...142 Keysight N9927 90001 User s Guide Calibration for NA CAT and VVM Modes Calibration Method Summary ...
Страница 202: ...202 Keysight N9927 90001 User s Guide SA Spectrum Analyzer Mode Channel Measurements ...
Страница 262: ...262 Keysight N9927 90001 User s Guide IQ Analyzer IQA Option 351 CPU2 Only Other Features Available ...
Страница 286: ...286 Keysight N9927 90001 User s Guide Interference Analyzer SA Mode Option 236 Record Playback SA Option ...
Страница 292: ...292 Keysight N9927 90001 User s Guide Reflection Mode SA Models Option 320 Reflection Mode Settings ...
Страница 316: ...316 Keysight N9927 90001 User s Guide Frequency Offset Using Power Sensor FOPS Option 208 FOPS Settings ...
Страница 332: ...332 Keysight N9927 90001 User s Guide Pulse Measurements Mode Option 330 Pulse Measurement Settings ...
Страница 346: ...346 Keysight N9927 90001 User s Guide VVM Vector Voltmeter Mode Option 308 A B and B A Measurements ...
Страница 370: ...370 Keysight N9927 90001 User s Guide AM FM Metrics SA Only and Option 355 Interpreting AM FM Metrics Error Messages ...
Страница 444: ...444 Keysight N9927 90001 User s Guide Noise Figure Mode Option 356 CPU2 Only Troubleshooting ...
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