Agilent Technologies E4438C Guide d'installation télécharger pdf (Page 61)

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

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Agilent Technologies E4438C Guide d'installation Page 61