Specifications

Chapter 8 203
Performance Tests
AF Analyzer Distortion and SINAD Accuracy Performance Test 14
AF Analyzer Distortion and SINAD Accuracy
Performance Test 14
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record) Table 9-14, “AF
Analyzer Distortion and SINAD Accuracy Test 14 Record,” on page 264.
A calibrated distortion source is created by summing the two internal
audio generators. Levels are measured separately by the internal AC
voltmeter. One source is set to a harmonic two or three times the
frequency of the other. The measured distortion and SINAD is
compared with the calculated value.
Figure 8-19 Setup
Procedure
1. On the Test Set:
a. Press
Preset.
b. Select the AF ANALYZER screen.
c. Set the AF Anl In field to Audio In.
d. Set the Audio In Lo field to Gnd.
e. Set the Detector field to RMS.
f. Select the RF GENERATOR screen.
g. Set the AFGen1 To field to Audio Out.
h. Set the AFGen1 To level field to 1.00 V.
i. Set the AFGen2 To field to Audio Out.
2. For the frequency (the harmonic) and level settings of Audio
Frequency Generator 2 shown in the Performance Test Record,
measure the distortion and SINAD on the Test Set and compare the
measured values to the limits.
AUDIO IN HI
AUDIO OUT