Agilent Technologies 8935 Series, Руководство пользователя

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188 Chapter 8
Performance Tests
RF Generator Residual FM Performance Test 4
Figure 8-8 Setup for Measurements to 2 GHz Using a Microwave Converter
Procedure
Steps 1 to 5 in the following procedure apply to both setups (shown in
Figure 8-7 and Figure 8-8 on page 188 ).
1. On the signal generator (to be used as the measuring receiver’s LO):
a. Set the frequency to 11.5 MHz.
b. Set the level to 0 dBm.
2. On the measuring receiver:
a. Reset the instrument.
b. Set the IF to 1.5 MHz (3.2 Special).
c. Set the high-pass filter to 50 Hz.
d. Set the low-pass filter to 15 kHz.
e. Set the measurement mode to FM.
f. If the instrument has an external LO switch, enable the external
LO mode (23.1 Special).
g. If the microwave converter is being used, set the frequency offset
mode to exit the mode (27.0 Special).
3. On the audio analyzer:
a. Reset the instrument.
b. Set the measurement mode to AC level.
c. Select the CCITT Weighting filter.
DUPLEX OUT
Signal Generator LO
Measuring Receiver
Audio Analyzer
INPUT
MODULATION OUTPUT
EXT LO
INPUT
RF
OUTPUT
INPUT 50
Ω
IF OUTPUT
LO RF
RF
INPUT
INPUT OUTPUT
Signal Generator
Microwave
Converter