Racal Instruments 3151 User Manual page 123

3151 And 3151A User Manual
Step Test Point
1 U27 pin 2
2 U41 pins 1 to 11, pin 28
3 U41 pin 26
4 U29, U46, U51 pin 1
5 U17-U20 pins 13-21
6 U31,U32,U35,U36 pins
17 through 20
7 U53-U57 pins 13-21
8 U31-U32 pins 13-15
9 U35-U36 pins 13-15
10 U37,U38,U58,U60 pin 9
11 U39 pin 5
12 U18 pin 4
13 U18 pin 2
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
Table 5-6a Engine Board Checkout Procedure - #1
"2.5 V squarewave, 1 MHz
-0.8 V to -1.8 V ECL level squarewave, 1 MHz
ECL Level Negative going pulses; 2 ns width, 1 MHz
TTL Level, 50 MHz
TTL Level, 1 MHz
TTL Level, 1 MHz
TTL Level, 1 MHz
TTL Level, Positive going pulses; 20 ns width, 1 MHz
TTL Level, Positive going pulses; 20 ns width, 1 MHz
TTL Level, Negative going pulses; 20 ns width, 1 MHz
TTL Level, Positive going pulses; 20 ns width
ECL Level 100 MHz
ECL Level 100 MHz
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.
Expected Result
Maintenance and Performance Checks 5-25