Installation guide

Performance Tests
FM Frequency Response
3-13
FM Frequency Response
This automated test verifies the FM frequency response specifications. The equipment measures the
variations in frequency deviations due to changes in the applied FM rate; dc to 100 kHz. The variations are
expressed relative to a reference signal; 1 kHz rate set at 100 kHz deviation, in dB. Each frequency is tested
with this sequence:
1. A reference signal is measured.
2. The set deviation is measured for each applied rate change.
3. Each deviation measurement is compared to the reference signal deviation.
The comparison is a calculation of the difference in the deviations relative to the reference rate. The relative
value is the FM frequency response.
Recommended Equipment
• Agilent 8902A measuring receiver
• Agilent 8904A function generator
Equipment Setup
Figure 3-11 FM Frequency Response Setup