Verifying Performance

Understanding the Tests

faulty also. If the front panel reading from the UUT is significantly different from the printed “measured” response, the normalization may be the cause. If the oscilloscope triggers incorrectly, the peak search may not find the actual peak response on the display.

Test 08: RF Analyzer Equipment Required

Level

HP/Agilent 8657A/B Signal Generator

HP/Agilent 8902A Measuring Receiver

HP/Agilent 11722A Sensor Module

Theory of the Test

The signal generator is used to generate CW signals at various frequencies and power levels. These are accurately characterized by the HP/Agilent 8902A/11722A and used as a reference. The CW signals are then used to test the UUT which is compared to the reference reading taken by the HP/Agilent 8902A/11722A.

Things To Check In Case Of Problems

Mismatch uncertainties cause a high level of measurement uncertainty in this measurement. If the HP/Agilent 11722A or HP/Agilent 8657A/B has a high SWR, the accuracy of the results may be reduced.

Test 09: RF Analyzer Equipment Required

GMSK Modulation

HP/Agilent 8116APulse Generator

HP/Agilent 8904A Opt. 001/002Multifunction Synthesizer

HP/Agilent 8657A/B Option 022.Signal Generator

Theory of the Test

The HP/Agilent 8904A frequency modulates the GMSK signal generator with a known amount of phase error. This test signal is used to verify the UUT’s ability to measure this known signal. The actual measurements are compared to the predicted to determine the accuracy of the UUT. The HP/Agilent 8904A is also used to create the 270.833 kHz clock signal and the pulse generator is used to create a random data pattern. Polarity of the data signal from the HP/Agilent 8657A/B Option 022 is not important in this measurement.

Things To Check In Case Of Problems

Make certain the option 022 part of the 8657A/B is locked up to the 270.833 kHz

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Agilent Technologies S GSM, 8922M manual Test 08 RF Analyzer Equipment Required Level