Agilent Technologies 8935 Series, Руководство пользователя

Страница: 201 / 343

200 Chapter 8
Performance Tests
AF Generator Frequency Accuracy Performance Test 11
AF Generator Frequency Accuracy
Performance Test 11
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record)
Table 9-11, “AF
Generator Frequency Accuracy Test 11 Record,” on page 261 .
Frequency accuracy is measured directly with a frequency counter. The
counter must be able to resolve 0.005% at 20 Hz.
Figure 8-16 Setup
Procedure
1. Set the counter to measure frequency.
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 frequency. Compare the
measured frequency 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 frequency. Compare the measured frequency
to the limits.
INPUT
AUDIO OUT
Counter