Wavetek 171 - Page 22

BOTH
6oo!l
OUT
&
5oi10UTBAD
SELECT
GEN
MODE
WITH
DIAL
AT
2.0
6-2
SELECT
SYNTHESIZER
MODE
PURITY
BAD
NOTE:
Unless
o'therwise
indicated, test points and designations apply to
syn'thesizer
(lower) board and digital switch settings
are
between
0. 1000
and
1.9999.
CHECK
~----..
GENERATOR
MODE
(FIGURE
6-2)
/'-..
VOLTAGE
ATTPS
(APPROX
CHECK
VARY
DIGITAL
SWITCH
SETTING
1------<
0.5
TO
5V)
PROPOR-
>-----.i
FN
(FIGURE6-4,SHEET
1
CHECK
SYNTHESIZER
LOOP
(FIGURE
6-4,
SHEET 2)
CHECK
GENERATOR
PHASE LOCK LOOP
(FIGURE
6-4, SHEET
5)
TIONAL
TO
DIGITAL:
SWITCH SETTINGS
7
YES
CONNECT PROBE
TOTPSON
GENERATOR BOARD
PROBLEM
IN
IC13
OR
IC10-
12
CIRCUITS
Figure 6-1.
Initial
Checks
COMPLETE
STEPS
12-14
ON
CALIBRATION
PROCEDURE
GENERATOR
PHASE LOCK LOOP
(FIGURE
6-4, SHEET 5)