HP 8559A User Manual

ADJUSTMENTS
5 - 25. FIRST CONVERTER ADJUSTMENTS (SERIAL PREFIX 2236A)
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 feedthrough)
and the tuning voltage
(TUNE) output of the A7 Frequency Control board and adjusting the YTO low - end
frequency for 3
GHz at OV 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 DIGITAL VOLTMETER
COMB
FREQUENCYCOUNTER GENERATOR
EXTENDER
CABLE
ASSEMBLY
Al6TPl
P
LOCATED A7TP4
THROUGH TUNE
HOLEIN / \
SIDE FRAME - .fq :%?:
HERE
SPECTRUM
; ((9 io)'(i3
ANALYZER
,,,,or, , ,.,- * fd
INPUT
INPUT
I
OUTPUT
I
FIGURE 51 1. FIRST CONVERTER ADJUSTMENTS TEST SETUP
EQUIPMENT:
FrequencyCounter ....................................................... HP5340A
Digital Voltmeter (DVM) .................................................. HP 3490A
Comb Generator ........................................................ HP 8406A
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 .............................................................. 0 dB
FREQ
SPAN/DIV ......................................................... 0 (zero)
ALTIF
................................................................. OFF(out)

HP 8559A Specifications

General

Brand	HP
Model	8559A
Category	Measuring Instruments
Language	English