HP 8559A Operation And Service Manual page 207

FIRST CONVERTER ADJUSTMENTS (SERIAL PREFIX 2236A)
5-25.
REFERENCE:
DESCRIPTION:
The First LO (A6 YTO) is adjusted by monitoring the YTO output at the
and the tuning voltage (TUNE)
frequency for 3 GHz at O V tuning voltage and 6 GHz at - 10V tuning voltage.
The FM Driver is adjusted by inputting comb signals to the analyzer and adjusting for proper spacing (span
linearity) of displayed signals on the CRT display.
DISPLAY
EXTENDER
CABLE
THROUGH
ASSEMBLY
EQUIPMENT:
Digital Voltmeter (DVM)
Comb Generator
PROCEDURE:
1. Allow one-half hour warmup time of equipment with analyzer connected to mainframe with extender
cable.
First LO Adjustments
2. Connect DVM to A7TP4 TUNE.
3. Set analyzer controls as follows:
INPUT ATTEN
FREQ SPAN/DIV
ALTIF
ADJUSTMENTS
output of the A7 Frequency Control board and adjusting the YTO low-end
DIGITAL VOLTMETER
TUNE
SPECTRUM
HERE
ANALYZER
,
INPUT
FIGURE 1. FIRST CONVERTER ADJUSTMENTS TEST SETUP
input connector (LO feedthrough)
FREQUENCYCOUNTER
I
INPUT
COMB
GENERATOR
OUTPUT
HP 3490A
HP 8406A