Table 4-10. CROSSTALK TESTS, TRANSMITTING AND RECEIVING CIRCUITS (Cont'd)

TM 11-5895-1141-34

Step

Operation

Normal Indication

Terminate the transmitting audio line pair

of the first channel with a 600 ohm 1%,

1/2 watt resistor. Connect an ac volt-

meter across the terminating resistor.

Set the channel select switch of first

channel to the LOCK position. Close the

P/T switch.

Measure the receive to transmit crosstalk

The crosstalk level should be at least 50 dB

level at the transmitter audio

below the normal transmit level as determined

termination.

in section II (Test and Adjustment of Equip-

ment) of chapter 3.

Repeat step 10 with each of the other

channels keyed in turn. Repeat the fore-

going tests with the received signal input

connected in turn to each of the used

channels.

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