HP 8340B Manual page 192

5-14. UNLEVELED RF OUTPUT ADJUSTMENTS (Cont'd)
UNLEVELED SQUEGGING TEST USING THE HP 8566B SPECTRUM ANALYZER
Description
The OUT's RF output signal is down converted using a Local Oscillator and a mixer. The IF output of
the mixer is fed to a spectrum analyzer. Any squegging of the OUT will appear as a spurious response
on the IF signal.
This test should be performed after adjusting the SYTM tracking and delay, and the SRO unleveled
bias. Since unleveled squegging can be difficult to see using the oscilloscope, this test is performed to
determine if additional adjustments are required.
Equipment Required
Synthesized Sweeper
10 dB Attenuator
Mixer
Spectrum Analyzer
Adapters
APC 3.5 (f) To Type N
APC 3.5 (f) to APC 3.5 (f)
(1 required if OUT is an HP 8341 B; 2 required if OUT is an HP 8340B)
5-86 Adjustments
(required if
(in)
DUT
Figure 5-43. Unleveled Squegging Test Setup
is HP 8341B)
OUT
SYNTHESIZED SWEEPER
(LOCAL OSCILLATOR)
HP 8340B Option 001
Option 010
HP 8493C
HP P/N 0955-0307
HP 8566B
HP P/N 1250-1744
HP P/N 5061-5311
HP 8340B/41B