Racal Instruments 3152, Руководство пользователя

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Maintenance and Performance Checks 5-21
Sequence Generator
Checkout
Problems with the sequence generator circuits can be detected if
the Model 3152 accepts word serial commands and responds
correctly to word serial queries, but fails to output sequences or
bursts. If there is a problem with the sequence generator circuits,
proceed with the checkout procedure given in Table 5-4.
Before starting the following procedure, reset the Model 3152 to the
factory default using the *RST command. Configure the Model
3152 to sequenced output mode and load three different
waveforms - 100 points long, to segments 1, 2, and 3, respectively.
Program each step to repeat once. Use the following commands
after loading the waveforms.
Remote Commands: :FUNC:MODE SEQ
:SEQ:DEF 1,1
:SEQ:DEF 2,1
:SEQ:DEF 3,1
:OUTP ON
Table 5-4 Sequence Generator Checkout Procedure
Step Test Point Expected Result
1 U45 pin 1, U42 pin 11 Negative going pulses; 2 ns width, 100 µs period
2 U46 pin 1, and 3 Same as above
3 U42 pin 12 Negative going pulses; 100 µs width, 200 µs period
4 U42 pin 8, U43 pin 14 Negative going pulses; 2 µs width, 100 µs period
5 U44 pin 14, U47 pin 14 Same as above
6 U47 pin 5 Negative going pulses; 2 µs width, alternating 100 µs
and 200 µs periods
7 U47 pin 2, and 3 Positive going pulses; 100 µs width, 200 µs period