Engine Board Circuit Checkout; Engine Board Checkout; Table 5-5, Burst Generator Checks - Racal Instruments 3151 User Manual

Step
1 U56 through U60 pin 2
2 U56 through U60 pin 9
3 U49 pin 2
4 U49 pin 5
Engine Board
Circuit Checkout
Engine Board
Checkout
Maintenance and Performance Checks 5-24
:TRIG:COUN 5
:OUTP ON
Connect an external trigger source to the front panel TRIG IN
connector. Set external trigger frequency to 1 kHz. Proceed with the
checkout procedure given in Table 5-5.

Table 5-5, Burst Generator Checks

Test Point
Five negative going pulses; 2 ns width, 100 Fs period,
repeated every 1 ms
Positive going pulses; 200 Fs width, 1 ms period
Positive going pulses; 400 Fs width, 1 ms period
Positive going pulses; 300 Fs width, 1 ms period
As described in the paragraph Main Board Circuit Checkout, the
Model 3151/3151A is made of two boards. If the engine board is
removed from the main board, reinstall it before continuing with the
following checks. The following circuit checks are performed on the
engine board only.
The engine board is the analog heart of the Mode 3151. It
contains the waveform memory circuit, high frequency clock drives,
and circuitry that drives the D/A converter. The output of the D/A
converter is routed directly from the engine board to the output
amplifier located on the main board.
Problems with the engine board circuits can be detected if the Model
3151/3151A accepts word serial commands and responds correctly
to word serial queries, however, fails to generate waveforms. If there
is a problem with the engine board circuits, proceed with the checks
given in Table 5-6a.
Before starting the following procedure, reset the Model 3151/3151A
to the factory default using the *RST command.
3151 And 3151A User Manual
Expected Result