Agilent Technologies 8935 Series, Manual

Page: 204 / 343

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