Specifications

Chapter 8 215
Performance Tests
RF Analyzer FM Bandwidth Performance Test 22
RF Analyzer FM Bandwidth
Performance Test 22
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record) Table 9-22, “RF
Analyzer FM Bandwidth Test 22 Record,” on page 273. An audio signal
from the audio analyzer provides FM for the AM/FM test source. The
AM/FM test source provides an RF signal (with FM) to the Test Set’s
internal RF analyzer. The measuring receiver is used to monitor FM
deviation as the level of the audio signal from the audio analyzer is
varied. The audio rate is varied in several steps from 20 Hz to 70 kHz.
The difference between the maximum and minimum FM peak deviation
is noted.
Figure 8-27 Setup
Procedure
1. On the AM/FM test source, set the test mode to FM.
2. On the measuring receiver:
a. Reset the instrument.
b. Set the measurement mode to FM.
c. Set the all filters off.
3. On the audio analyzer:
a. Reset the instrument.
ANT IN
Audio Analyzer
Measuring Receiver
AM/FM Test Source
FM OUTPUT
AUDIO
INPUT
OUTPUT
INPUT 50Ω