Am Accuracy; Low Band 2 Ghz - Agilent Technologies 83620A Service Manual

16. AM Accuracy

Description and Procedure
his procedure measures the AM accuracy of the synthesizer. he local
oscillator and mixer are used to downconvert the synthesizer frequency to the
frequency range of the measuring receiver (an HP 11793A Microwave Converter
can be substituted for the mixer). For measurements above 20 GHz RF output
frequency, a spectrum analyzer with external mixer are used to downconvert
to a 321.4 MHz RF. he function generator provides AM modulation. he
function generator signal level is adjusted for 30% AM as measured by the
measuring receiver. he function generator signal level is checked for accuracy.
A DVM may be necessary to measure the function generator output.
1. urn on the equipment shown in Figure 2-23. Preset the instruments and
let them warm up for at least one hour.
2. On the measuring receiver, calibrate and store the AM calibration factor.
<
Low Band 2 GHz
Disregar if beyon your synthesizer's capability.
3. Connect the equipment as shown in Figure 2-23.
2-96 Performance Tests
AM Accuracy
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