Installation guide

Performance Tests
AM Frequency Response
3-14
AM Frequency Response
This automated test verifies the AM frequency response specifications. The equipment measures the
variations in modulation depth due to changes in the applied AM rate; dc to 10 kHz. The response is relative
to a 1 kHz rate set at the test depth, and expressed in dB. Each frequency is tested with the following
sequence:
1. A reference signal is measured.
2. The set depth is measured for each applied rate change.
3. Each depth measurement is compared to the reference signal depth.
The comparison is a calculation of the difference in the depths relative to the reference rate. The relative
value is the AM Frequency Response.
Recommended Equipment
• Agilent 8902A measuring receiver
• Agilent 8904A function generator
• Use one of the following:
— for models with Option 501, 502, 503, 504 or Option UNJ, use an Agilent 8662A/8663A
high-performance RF signal generator
— for models with Option 506, use an Agilent E4426/E4437 signal generator
• MD/MDC-164 mixer (0.5 to 9 GHz)
Equipment Setups
Figure 3-12 AM Frequency Response ≤ 1300 MHz Setup