Wavetek 145 Instruction Manual page 42

GENERATOR LOOP
PLACE A LL CON-
TROLS IN INITIAL*
POSITIONS
YES
<
P1-9 +24 Vdc
?1-8 -24 Vdc
P1-7 -15 Vdc
P1 -fi +15 Vd~
>
NO
APPROX +10 Vdc
<
AT 04 & - 10 V de
AT 06 EMITTERS
YES
.........__~
VOLTAGE AT
WIPER SW1-F
<
(GN W!RE) THE
SAME AS AT TP2
7
YYES
APPROX 2 Vdr.
AT COLLECTOR
<
015 & OPPOSITE
ll'J POLARITY TO
THAT AT TP2
7
l.YES
VOLTAGE AT
NO
NO
~
>--------- ►L:_/
CHECK
> - - - - - - - - - - - - - . . _ . i TRIANGLE AMPL
/
...-
NO
NO
.,,,..-
08 - 012 CIRCUIT
CHECK
HYSTERESIS
SWITCH IC9 &
015 - 017 CIRCUIT
EMITTERS 013 & 014 NO CHECK
<
THE SAME AS AT > - - - - - - - - - - - - 1 ~ ~ IN rEGRATOR 013
COLLECTOR 015 & 014 CIRCUITS
-0-
Bi DIODES CR6 - CR9
*NORMAL/DOUBLE/DELAY SWITCH ·1·0 NORMAL, FREQ VERNIER TO CAL,
CR 26
DIAL TO 2.0, ALL OTHERS TO 1:2 O'CLOCK
**A NEGATIVE VOLTAGE HERE STOPS GENERATOR FOR TRIGGERED
OPERATION
***USE SCOPE AND HIGH IMPEDANCE PROBE
Figure 6-2. Generator Loop Checks, Generator Board
6-7