15
TEST PROCEDURES
5. High Level Input Test
5.1 Apply a 1 kHz signal to the high level
inputs.
5.2 Increase the input level until the output
just begins to clip. The signal input reading
should be approximately 2.75 Volts.
6. Protection Circuit Test
Note: This test is for the 1401 II and the
1201 only. Signal is applied to the low level
input.
6.1 Apply a 1 kHz signal so the output of
the unit is approximately 1.50 Volts.
6.2 Short anyone of the outputs to ground.
The unit should immediately shut down and
then try to turn on every three seconds.
6.3 Remove the short. The unit should turn
on and operate properly without damage to
the channel that had been shorted.
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