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Page Title: Table 4-10. CROSSTALK TESTS, TRANSMITTING AND RECEIVING CIRCUITS (Cont'd)
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TM 11-5895-1141-34
Table 4-10. CROSSTALK TESTS, TRANSMITTING AND RECEIVING CIRCUITS (Cont'd)
Step
Operation
Normal Indication
3
Remove the ac voltmeter from the termina-
The crosstalk level should be at least 50 dB
tion of the first channel and connect it
below the signal level of the active channel.
in turn to each of the other channels
used. Read the crosstalk level.
4
Connect the ac voltmeter across the loud-
The loudspeaker reading should not exceed
speaker terminals. On each channel in
1 mv.
turn, set the receive select switch to the
Loudspeaker position. Measure the cross-
talk between the transmitting and receiv-
ing circuits.
5
Repeat steps 2, 3, 4 with each of the
receiving channels.
6
Receiving Crosstalk Test. Preliminary
test set-up.
a. Disconnect the audio line pair from
the radio receiver where they first eater
the radio channel control system wiring.
Connect the audio signal source in the
receiving test figure 4-4 to the received
input signal of the first channel.
b. Replace the 600 ohm simulated load
with a 50 ohm, 1% resistor.
4-22


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