HP 8559A Operation And Service Manual page 156

ADJUSTMENTS
5-27. THIRD CONVERTER ADJUSTMENTS
REFERENCE:
A10 Schematic
DESCRIPTION:
First, the Third LO is adjusted for proper frequency using a frequency counter. Next, the second IF bandpass
filter is aligned by injecting
21.4 MHz output signal with another spectrum analyzer. The filter is aligned for a bandpass wide enough to
accommodate any frequency drift occurring in the RF section of the analyzer and the amplitude necessary to
provide the overall gain characteristics required by the analyzer.
SPECTRUM ANALYZER
D l SPLAY
EQUIPMENT
Sweep Oscillator
Spectrum Analyzer
Function Generator
Test Cable, BNC (m) to SMB
Adapter, SMC (m) to SMC (m)
Adapter, Type N (m) to BNC
20 dB Attenuator
Test Cable, BNC (m) to SMC
Extender Cable Assembly
ADJUSTMENTS
a frequency modulated 321.4 MHz signal at the necessary level and monitoring the
MICROWAVE
COUNTER
'ER ADAPTER
SPECTRUM
ANALYZER
EXTENDER
CABLE
ASSEMBLY
FIGURE 5-14. THIRD CONVERTER ADJUSTMENTS TESTSETUP
(2 required)
(f)
(3 required)
(f)
SWEEP
.
OSCILLATOR
I
I
ADAPTER
ADAPTER ATTENUATORS
MODEL 8559A
FUNCTION
QENERATOR
OUTPUT
.
PLUG- IN
OUTPUT
HP 8620(3/86222A
HP 1250-0827
HP 1250-0780
HP 8491B, Option 020
H P 1 l592-60001
HP 5060-0303