HP 8642A Operation And Calibration Manual page 287

Model 8642A/B Performance Tests
PERFORMANCE TESTS
4-14. THIRD ORDER INTERMODULATION
SPECIFICATION:
Electrical Characteristics Performance Limits Conditions
Third Order Intermodulation <-55 dBc.
+12 dBm. two generators 25
DESCRIPTION:
EQUIPMENT:
PROCEDURE:
kHz apart into a resistive
combiner.
Intermodulation is checked by summing another Signal Generator and the
HP 8642 into a spectrum analyzer. The intermodulation products are then
measured on the spectrum analyzer.
o
0 0 [
10
SPECTRUM
Rf
RF
0
0
0
~CJ~
§§ §§§§§
0
~
D
OUTPUT
INPUT
ANALYZER
I j
HP 8642A1B
SYNTHESIZED
>--
POWER SPL I TTER
StGNAL GENERATOR
6dB PAD
I
RF
OUTPUT
SIGNAL
GENERATOR
Figure
4 -1 O.
Intermodulation Test Setup
Spectrum Analyzer .......................... HP 8566B
Power Splitter ............................... HP
11667A
Signal Generator ............................ HP 8642B
6 dB Pad ..................................... HP 8491A opt. 006
1.
Connect the instruments as shown in Figure 4-10.
2. Set up the HP 8642 as follows:
INSTRUMENT PRESET
AMPLITUDE
FREQ
+12 dBm
1050 MHz
4-37