Anritsu MG3641A - Manual (Page 177)

SECTION 7 PERFORMANCE TEST
7-9
(4) Test procedure
STEP PROCEDURE
FM deviation
1. Set the MG3641A/MG3642A output level to +7 dBm.
2. Set the MG3641A/MG3642A frequency and modulation analyzer receive frequency to the
expected frequency.
3. Turn on the MG3641A/MG3642A FM, and set Source to Int1 1 kHz.
4. Set the MG3641A/MG3642A FM frequency deviation.
5. Read the indicator of the modulation analyzer.
6. Change the MG3641A/MG3642A FM frequency deviation and repeat the measurement.
FM distortion
7. Set the MG3641A/MG3642A FM frequency deviation to 3.5 kHz or 22.5 kHz.
8. Measure the demodulation output of the modulation analyzer using the distortion meter.
(5) Note on test
• The demodulation zone of the modulation analyzer must be within 0.3 to 3 kHz at measurement of the FM
deviation and 0.3 to 15 kHz or 0.3 to 20 kHz at measurement of distortion rate.
• Using a modulation analyzer with much residual FM affects the measurement of distortion if the FM deviation
rate is lower. Use a modulation analyzer with a little residual FM.