HP 8559A Operation And Service Manual page 151

MODEL 8559A
5-26. SECOND CONVERTER ADJUSTMENTS
REFERENCE:
A3, A4, AS, A6, and A8 Schematics
DESCRIPTION:
First, the Second LO is adjusted for proper frequency using a frequency counter. Next, the signal identifier (SIG
ID) and alternate IF (ALT IF) signals are adjusted so that the displayed signal appears in the same location in
both regular and alternate IF and the signal identifier is always 1 MHz away from this signal in either regular or
alternate IF. Last, the first IF bandpass filter is aligned for a bandpass wide enough to allow for the first LO
shift and amplitude characteristics such that there will be a minimal shift in displayed signal amplitude when the
analyzer is switched from regular to alternate IF.
D l SPLAY
EQUIPMENT:
Frequency Counter
Function Generator
Test Cable, BNC (m) to SMB
Adapter, BNC
Adapter, SMB (m) to SMB (m)
Adapter, SMB
Adapter, Type N (m) to BNC
Special Tuning Tool, Allen driver inserted
through drilled-out 5/ 16 inch nut driver
Oscilloscope
Extender Cable Assembly
ADJUSTMENTS
FUNCT ION
QENERATOR
:
O U T P U T
VARACTOR
O U T P U T
u
FIGURE 5-12. SECOND CONVERTER ADJUSTMENTS TEST SETUP
(f)
to Alligator Clips
(f)
(f) to SMB (f)
(f) (2 required)
COUNTER
000 000
0
ADAPTER TEST
ADAPTER
ANALYZER
ADJUSTMENTS
TER
HP 5342A
HP 33 10A
HP 85680-60093
HP 8120-1292
HP 1250-0669
HP 12%0672
HP 1250780
HP 08555-60107
HP 5060-0303