HP 8642A - 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
Ij
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