Wavetek 145 Instruction Manual page 52

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CHECK
PULSE DISABLE FROM E39
ON TRIG/PULSE TO E21 ON
GENERATOR; A LOW DIS-
ABLES PULSF FUNCTIONS;
CHECK SW4-A
PULSF SELECT STAYS LOW
CHECK
CONNECT SYNC OUT
TO EXT SYNC OF SCOPE
SET PULSE MODE
TO DELAYED
IC9, R44, SW4-B ON GENER-
ATOR & WIRING FROM E23
ON GENERATOR TO E34
ON TRIG/PULSE
SET PULSE MODE
TO DOUBLE .,__ _ _ ___
REDUCE PULSE
WIDTH VARIABLE
TO 12 O'CLOCK;
SET PULSE DELAY
VARIABLE TO CW
COMPLETE PULSE
RANGE CHECKS IN
TABLE 6-1. IF EQUIVA-
LENT DOUBLE PULSE
DISPLAY IS OBTAINED
ON EACH RANGE, PULSE
MODE IS OK
Figure 6-8. Pulse Mode Checks, Trig/Pulse Board (Page 2 of 2)
Table 6-1. Pulse Ranges
Pulse Width
Ranging Components Pulse Delay Ranging Components Pulse Period Scope Horizontal
OFF
IC5, SW3-A NA NA NA NA
25 ns I 100 ns C55, 019, 020, SW3-B
50 ns I 100 ns
C40, 016, 017, SW2-B > 0.5µs 0.05 µs/div
100 ns I 1
µs
C56, CR29, CR30 100 ns I 1
µs
C41, CR19, CR20 >5µs 0.5 µs/div
1
µs
I 10
µs
C57, CR31, CR32 1
µs
I 10
µs
C42, CR21, CR22 > 50µs 5 µs/div
10
µs
I 100
µs
C58, CR33, CR34 10
µs
I 100
µs
C43, CR23, CR24
> 0.5 ms
50 µs/div
100
µs
I 1 ms C59, CR35, CR36
100
µs I 1 ms
C44, CR25, CR26
>5 ms
0.5 ms/div
100 µs I 1 ms
C59, CR35, CR36 1 ms I 10 mst C45, CR27, CR28
>5ms 0.5 ms/div
~
IC4 - IC6, SW3-A NA
NA 0.5 ms 0.5 ms/div
tRotate PULSE DELAY VERNIER ccw for proper display
6-17