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

TM 11-5895-1141-34

Step

Operation

Normal Indication

c. Connect an ac voltmeter across the

50 ohm resistor.

d. Set the switch S1001 of the first

channel to the Headset position, leaving

the switches of the other channels in the

off position. Set all the channel select

switches to the off position.

Set the received signal source to a level

Record the voltage across the 50 ohm headset

of 310 mv which is equal to twice that

load resistor.

normally used, allowing for a 6 dB drop in

the terminating resistor.

Set the switch S1001 of the first channel

The crosstalk level at the headset output

to the off position. Set the switch S1001

should be 50 dB below the reading of step 7.

of each of the remaining channels, one at

a time, to the Headset position, measuring

the crosstalk level at the headset load

resistor. Do this for each channel in

turn, with the switch S1001 of all the

other channels set to off.

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