Wavetek 143 - Page 40

SYNC OUT BAD
SYNC OUT OK
YES
CHECK
SYNC AMPLIFIER ON
GENERATOR BOARD
SET GENERATOR
TO 2.0 X 1 MHz
IN CONT MODE
APPROX 30 ns
POSITIVE TTL PULSE
AT SYNC OUT
?
II
30 ns POSITIVE
PULSE AT IC48 CHECK
ON TRIG/PULSE IC3, 1C4 & P1-1
BOARD WIRING
?
YES
30 ns POSITIVE
PULSE AT 1С7-8
ON TRIG/PULSE
CHECK
COAX FROM
E30 & E31 TO J7
CHECK
IC6 & IC7
SYNC OUT BNC BOARD
MULA
SET GENERATOR ER
TO TRIG OR GATE GENERA-
MODE, TRIG SIGNAL TOR TRIGGERS YES
TRIG IN BAD BETWEEN 1 & 10V BY ROTATING TRIG OK
PEAK AMPLITUDE; TRIGGER
FREQ APPROX 1/10 LEVEL ?
GENERATOR FREQ юэ
TRIG SIGNAL
YES _ APPEARS АТ E17 CHECK
(s K———« ON TRIG/PULSE E17 & E18 WIRING
BOARD TO J2
A
ZN
N EXPECTED FREQ
GENERATOR FREQ (SUM OF VCG IN
CHECK
M
ο... FOLLOWS DIAL & DIAL SETTING) ee
WITHOUT VCG IN EXCEEDS LIMITS ON GENERATOR
INPUT OF FREQ RANGE NADAN
2 2
ΝΟ
CHOOSE A RANGE
THAT INCLUDES
FREQUENCIES TO
BE REACHED, NOT
EXCEEDING 1000:1
Figure 6-7. Generator Input and Output Checks (Page 1 of 2)
6-10