84 General Information TB7100 Service Manual
© Tait Electronics Limited October 2005
Alternative Test
Setup with TOPA-
SV-024 Test Unit
and TMAC20-0T
Control Head
An alternative test setup using the TOPA-SV-024 test unit and cables of the
TMAA21-00 kit and a TMAC20-0T control head used for testing the
transmitter and receiver modules is shown in Figure 6.3.
When using the alternative test setup, the switches of the test unit must be
set as described below. (When programming or calibrating the base station,
the switches have no effect, although it is good practice to set the
MODE
switch to “R
X”.)
Transmit tests Receive tests
Switch Position Switch Position
HOOK OFF HOOK HOOK OFF HOOK
MODE
RX initially
a
a. When ready to transmit, set the mode switch to the TX/PTT position. This switch
functions in the same way as the PTT switch on the microphone.
MODE RX
AUDIO
IN MIC AUDIO AUDIO IN OFF
AUDIO
OUT (immaterial) AUDIO OUT SPEAKER or LOAD
b
b. With the switch in the SPEAKER position, the received audio is output from the test
unit’s speaker. In the L
OAD position a 16Ω load is switched into the circuit in place of
the test unit’s speaker. Note, however, that the audio out switch has no effect on the
speaker.
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