Wavetek 171 - Page 31

GENERATOR PHASE LOCK
LOOP CHECK
(GENERATOR
BOARD)
SYNTHESIZER MODE
OUTPUT BAD
SYNTHESIZER LOOP
SET
MODE SWITCH
TO
SYNTH MODE
FREQ OR PURITY
ON ONE OR MORE
RANGES
BAD
FREQ OR
PURITY
ON ALL
RANGES
BAD
''''Tyes
NO
OUTPUT
\
AT
ALL
RANGES
\ /
CHECK
TP5
ON
GEN
BD
/FILTER/
OUTPUT
SATURATED
^AT±15V/
NO
|
/CAN BE'/
ADJUSTED
WITH R31 ON
XSYNTH
Bl/
COMPLETE
STEPS
12-
14
OF
CALIBRATION
PROCEDURE
CHECK
COAX &
MODE
SELECTOR
SW
(SI,
FRONT
PANEL)
/
GEN ^/
FREQ
SIGNAL'
AT
PIN
3 IC9
ON
GEN BD^
/SYNTIT/
-TREQSIGNAI>
AT
PIN 1
1C9
\ON GEN
8D/
CHECK
IC1.9
CIRCUITS &SW1-D
ON
GEN BD
REPLACE
IC10
Figure
6-4.
Synthesizer
Mode Checks
(Sheet
5
of
6)
6-11