Agilent Technologies 8935 Series, Руководство пользователя

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206 Chapter 8
Performance Tests
AF Analyzer Frequency Accuracy at 400 kHz Performance Test 17
AF Analyzer Frequency Accuracy at 400 kHz
Performance Test 17
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record)
Table 9-17, “AF
Analyzer Frequency Accuracy at 400 kHz Test 17 Record,” on page 267 .
To measure frequency accuracy at 400 kHz, the RF signal from the Test
Set’s DUPLEX OUT port is applied to the audio input and the input to
the measuring receiver and the two measured frequencies are
compared.
Figure 8-22 Setup
Procedure
1. On the measuring receiver:
a. Reset the instrument.
b. Set the measurement mode to frequency.
2. On the Test Set:
a. Press
Preset
.
b. Select the INSTRUMENT CONFIGURE screen.
c. Set the
RF Display
field to
Freq
.
d. Select the CDMA GENERATOR screen.
e. Set the
CW RF Path
field to
Bypass
.
f. Select the RF GENERATOR screen.
g. Set the
RF Gen Freq
to
0.4 MHz
.
h. Set the
Amplitude
to
-21 dBm
(20 mV).
i. Select the AF ANALYZER screen.
j. Set the
AF Anl In
field to Audio In.
k. Set the
Filter 2
field to
>99kHz LPF
.
AUDIO IN HI
DUPLEX OUT
INPUT 50
Ω
Measuring Receiver