D3.8 Installation and Configuration M8SL2-00-002-812
© Copyright Tait Electronics Limited August 2004. All rights reserved.
3.2.1 Equipment Setup for Level Configuration.
Configuring the T803 Line levels (using PGM800Win or Test Mode) and radio receiver
or transmitter levels requires the sub-rack and test equipment to be set up as shown
below.
Figure 3.3 Rack and test equipment setup
Remove any coaxial relay or duplexer in the T800 modules’ RF path and connect them
directly to an RF Test Set. Ensure that transmitter or PA RF output is sufficiently attenu-
ated to prevent damage to the test set.
Run up the receiver and transmitter as instructed in Part B and C of this manual.
3.2.2 Use of Test Microphone
The T803 test microphone is used to communicate both on air to radios and down the
line to dispatch consoles. It plugs into the RJ11 connector on the front panel which dou-
bles as a programming port. It is electrically connected in parallel with the receiver
(microphone with receiver audio and PTT button with receiver mute).
Most dispatch consoles are equipped with an intercom facility whereby speech can be
sent to line without a keytone. This enables the dispatcher to talk to service personnel at
the repeater site using the T803’s built in speaker without broadcasting speech to air.
The service personnel can talk back to the dispatcher using the T803 test microphone
(the PTT must be pressed to gate microphone speech).
T803
T856
RX
T854
TX
T800-23
PSU
TB8SL2
Line
matching
Line Loss
(simulated
or actual)
Audio meter
or
Remote
Controller
RF TEST SET
Output
Input
Attn
This test equipment is
required for the Test Mode
method. It is optional for
the PGM800Win method.
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