Tait TB8100, User Manual

Page: 182 / 254

172 Part H: Diagnosing
© Tait Electronics Limited December 2007
Reciter Tests
The Service Kit lets you carry out tests on the receiver, synthesiser lock ranges,
audio lines, and the various digital inputs and outputs.
Receiver Tests
The Receiver form (Diagnose > Reciter > Receiver) lets you carry out various
tests on the receiver part of the TB8100 reciter.
Testing Receiver Operation
The Set receiver frequency test provides a quick way to get the receiver
operating. You manually set the receiver frequency and do not need to alter the
base station’s configuration.
1. Connect an RF source to the reciter.
2. Select Diagnose > Reciter > Receiver. In the Frequency box, enter the
frequency you want to receive on. Alternatively, use the arrow buttons to
shift the frequency up or down.
3. In the Channel Spacing box, select a value from the drop-down list.
4. Click Start Test .
In the Receiver Values area, a green LED indicates whether the receiver
synthesiser managed to lock onto the frequency. The area also displays the
current RSSI and SINAD and the receiver’s operating frequency.
5. If there is no response, check the Receiver state LED and box to verify
that the receiver is on. If it is not on, the Exciter state LED and box
indicate whether the whole reciter is off.
Note:
The SINAD is approximate and is obtained by comparing the
in-band audio against out-of-band noise. This value should not be
relied upon to make calibrated measurements.
6. To listen to any unmuted signal on the base station speaker, follow these
steps:
a. On the control panel, press the speaker button to turn on mute-
controlled audio.
b. In the Control area, click Start Test .
c. Click Unmute Output .