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3151 And 3151A User Manual
Maintenance and Performance Checks 5-25
Table 5-6a Engine Board Checkout Procedure - #1
Step
Test Point
Expected Result
1
U27 pin 2
"
2.5 V squarewave, 1 MHz
2
U41 pins 1 to 11, pin 28
-0.8 V to -1.8 V ECL level squarewave, 1 MHz
3
U41 pin 26
ECL Level Negative going pulses; 2 ns width, 1 MHz
4
U29, U46, U51 pin 1
TTL Level, 50 MHz
5
U17-U20 pins 13-21
TTL Level, 1 MHz
6
U31,U32,U35,U36 pins
17 through 20
TTL Level, 1 MHz
7
U53-U57 pins 13-21
TTL Level, 1 MHz
8
U31-U32 pins 13-15
TTL Level, Positive going pulses; 20 ns width, 1 MHz
9
U35-U36 pins 13-15
TTL Level, Positive going pulses; 20 ns width, 1 MHz
10
U37,U38,U58,U60 pin 9
TTL Level, Negative going pulses; 20 ns width, 1 MHz
11
U39 pin 5
TTL Level, Positive going pulses; 20 ns width
12
U18 pin 4
ECL Level 100 MHz
13
U18 pin 2
ECL Level 100 MHz
14
U15 pin 2, U16 pins
2,3,14,15, U19 pins
2,3,9 14, U20 pin 14,
U21 pin 6, 11, U22 pin
6
ECL Level 100 MHz
Change the Model 3151/3151A setting to triggered. Use an external
pulse generator to apply a TTL level, 200 kHz signal to the TRIG IN
connector. Proceed with the checks given in Table 5-6b.
Summary of Contents for 3151
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