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ADJUSTMENTS
MODEL
8559A
ADJUSTMENTS
5
-
25.
FIRST CONVERTER ADJUSTMENTS
REFERENCE:
A3, A4, AS, A6, and A7 Schematics
DESCRIPTION:
The First LO (A6 YTO) is adjusted by monitoring the YTO output at the RF input connector (LO emission) and
the tuning voltage (TUNE) output of the A7 Frequency Control board, and adjusting the YTO low-end fre
-
quency for 3 GHz at OV tuning voltage and 6 GHz at
-
10V tuning voltage.
COMB
QENERATOR
MICROWAVE
COUNTER
/
\
DIGITAL VOLTMETER
1111
Dl SPLAY
OUTPUT
CABLE
ASSEMBLY
I
FIGURE
5-1
1.
FIRST CONVERTER ADJUSTMENTS TEST SETUP
n
EQUIPMENT:
A7TP4
FrequencyCounter
.......................................................
HP5342A
Digital Voltmeter ........................................................ HP 3456A
Comb Generator
........................................................
HP 8406A
Cable, BNC (m) to Banana Plug
...........................................
HP 101 1 1A
Extender Cable Assembly
..............................................
HP SO6O-0303
Adapter, BNC
(f)
to Alligator Clips
......................................
HP 8120
-
1292
Cable Assembly,
RG-214/U, Type N Connectors ............................. HP 1 1500A
PROCEDURE:
EXTENDER
CABLE
ASSEMBLY
1. Allow one
-
half hour warmup time of equipment with spectrum analyzer connected to mainframe with
extender cable.
A16TPl TUNE
LOCATED THROUGH
\
HOLE IN SIDE
FRAME HERE
--C
'O:z
SPECTRUM
L
.
@.@@@
ANALYZER
..no
O...Q
CABLE
RQ214lU
- -