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6.7 Connect an Oscilloscope to the output
of the AmPlus 100 Amplifier at J6 so you
can visually monitor the output. Leave the
dB meter connected as well.
6.8 From a second source, apply a
balanced 100 mVrms, 5 kHz signal to the
Channel 1 "A" source input at J1 of the
AmPlus™ 100 Amplifer.
6.9 When the input at the "A" Source
Input is applied, you should see the output
of the AmPlus 100 Amplifier change from a
1 kHz signal to a 5 kHz signal. This is due
to the "B" Source Input being attenuated
by the Opti-Source™ Option Card circuitry
when an "A" Source Input signal is
detected.
6.10 Remove the input at the "A" Source
Input of the AmPlus 100 Amplifier and
begin timing how long it takes for the "B"
Source Input to return.
6.11 It should take approximately 8
seconds for the "B" Source Input to return
to its previous level.
6.12 While the "B" Source Input signal is
muted, note the level on the dB meter. It
should be
≤
-20.0 dB.
6.13 Repeat the above tests using the
Channel 2 "A" and "B" Source Inputs.
TEST PROCEDURES
