Tait TB8100, User Manual

Page: 185 / 254

TB8100 Service Kit User’s Manual
Reciter Tests 175
3. In the Lower Frequency and Upper Frequency boxes, view the results
of the test. These values report the range within which the synthesiser is able
to lock onto the specified frequency.
Note:
The reported ranges are conservative. In fact, the base station
will be able to transmit and receive outside the range, but with
reduced transmit output and receive sensitivity.
4. Click Stop Test . The exciter and receiver frequencies revert to what they
were when you started the test.
Audio I/O Tests
The Audio I/O form (Diagnose > Reciter > Audio I/O) lets you measure the
level of any audio input or put a 0 dBm signal tone on the balanced or
unbalanced line out.
In the Input area, the Audio Input gauge displays the level of the current audio
input. In the Output area, the Audio Output gauge displays the audio level of
the line out selected by the option buttons. The display continues to update
every 500 ms.
Measuring the Audio Input Level
The reciter can measure the level of the current audio input and display it on
the Service Kit.
You can use this diagnostic tool in the following situations:
Q
Troubleshooting: the measurement shows you whether audio is arriving at
the base station.
Q
Adjusting the audio output of other equipment such as a console.
Q
Defining channel profiles: the measurement tells you the actual input level
so that you can specify a value for the expected input level.
Note:
Audio that is input during the test is not transmitted, because
the base station goes into standby mode for the test.
To measure the audio input level
1. Make sure that audio is being fed into one or more inputs on the reciter’s
system interface.
2. Select Diagnose > Reciter > Audio I/O.
3. Click the appropriate option to select the type of input you want to
measure.