FM Deviation Accuracy is checked at CW frequencies from 500 MHz to 1.0 GHz. If the DUT meets the accuracy specification in this frequency range, accuracy in all other frequency ranges will be assured due to the signal generator's design.
A measuring receiver is used to demodulate the FM signal and indicate the recovered FM deviation. The measuring receiver is calibrated prior to the measurement. If it has recently been calibrated, another calibration is not necessary.
This test supports two equipment setups using either a spectrum analyzer or a measuring receiver. The spectrum analyzer is the preferred solution.
A spectrum analyzer with analog demodulation measurement application is used to demodulate the signal and measure the deviation.
Test Equipment |
Recommended Models |
Alternative Models |
Spectrum Analyzer |
N9030B Opt 5xx1, N9063EM0E Analog Demodulation Measurement application |
N9030A2 Opt 5xx1, N9063EM0E Analog Demodulation Measurement application E444xA3 Opt 233 Measuring Receiver Personality |
Function Generator |
33622A |
33611A |
Digital Voltmeter |
3458A Opt 002 |
34470A |
|
Alternatively, an 8902A measuring receiver is used to demodulate the signal and measure the deviation.
Test Equipment |
Recommended Models |
Alternative Models |
Measuring Receiver |
8902A |
|
Function Generator |
33622A |
33611A |
Digital Voltmeter |
3458A Opt 002 |
34470A |
|
|
Connect all test equipment as shown.
Connect GPIB cables to all GPIB-controlled test equipment.
While performing this performance test, follow all instructions on the controller display.
Setup for External FM Deviation Accuracy
Setup for Measuring Receiver Calibration
Setup for External FM Deviation Accuracy
If this performance test fails, perform the following steps in order:
Check the equipment setup (see above). If the setup is incorrect, make the necessary corrections and rerun the Performance Test.
If this test fails with the equipment set up properly, refer to the troubleshooting section of the signal generator's service guide. If you do not have a printed copy of the service guide (Option OBW), one is available either on the CD-ROM that came with your signal generator shipment or on the Keysight Website.
If you cannot correct the problem using the troubleshooting procedures in the Service Guide, obtain service from Keysight Technologies. Refer to Contacting Keysight Technologies.