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Chapter 8 199

Performance Tests

AF Generator Residual Distortion Performance Test 10

AF Generator Residual Distortion

Performance Test 10

The purpose of this test is to verify that the Test Set meets the

specification limits in PTR (Performance Test Record) Table 9-10, “AF

Generator Residual Distortion Test 10 Record,” on page 259. Audio

distortion is measured directly with an audio analyzer.

Figure 8-15 Setup

Procedure

1. On the audio analyzer:

a. Reset the instrument.

b. Select the 80 kHz low-pass filter.

c. Set the measurement mode to distortion.

2. On the Test Set:

a. Press

Preset.

b. Select the RF GENERATOR screen.

c. Set the AFGen1 To and AFGen2 To fields to Audio Out.

3. On the Test Set for Audio Frequency Generator 1 do the following:

a. Set the AFGen2 To level field to Off.

b. Set the audio frequency and level as shown in the Performance

Test Record (PTR) and measure the audio distortion. Compare

the measured distortion to the limits.

4. On the Test Set for Audio Frequency Generator 2 do the following:

a. Set the AFGen1 To level field to Off and AFGen2 To level field to

on.

b. Set the audio frequency and level as shown in the PTR and

measure the audio distortion. Compare the measured distortion

to the limits.

INPUT

AUDIO OUT

Audio Analyzer

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