Model 8642A/B Performance Tests
PERFORMANCE TESTS
4-14. THIRD ORDER INTERMODULATION
SPECIFICATION:
Electrical Characteristics
Third Order Intermodulation
Performance Limits
<-55 dBc.
Conditions
+12 dBm, two generators 25
kHz apart into a resistive
combiner.
DESCRIPTION:
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.
□ □ C
DD DDDDD ^-^ □
□
D
nnppn f ) ~
A
flF
OUTPUT
RF
INPUT
HP
8642A/B
SYNTHESIZED
SIGNAL GENERATOR
SPECTRUM
ANALYZER
POWER SPLITTER
6dB PAD
IRF
I OUTPUT
SIGNAL
GENERATOR
EQUIPMENT:
PROCEDURE:
Figure 4-10. 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 +12 dBm
FREQ 1050 MHz
4-37
To Next Page
