Racal Instruments 3152A, Руководство пользователя

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3152A User Manual
Racal Instruments
©
2001 Maintenance and Performance Checks 5-29
Table 5-7a, 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 3152A 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 5-7b.