CIRCUIT ALIGNMENT

TM 11-5895-1141-34

d. In many cases, the above are the only final adjustments that will be required. If it is desired to have the regulator

take effect at a higher microphone input level, the input level adjust control R1202 (fig. FO-7) may be turned down, and

the regulator adjust control, R1218 (fig. FO-7), readjusted to give 0 dBm output with the R1230 control at maximum.

Some trial might be necessary to determine the best settings for the particular system.

e. Receiving Circuits. The equipment is placed in the receiving mode of operation with a 1000 Hz signal applied to

the received signal input point, and a simulated headset load connected to the Jack panel assembly for measurement of

the resulting output. There are no adjustments in the loudspeaker circuit.

Set up the equipment to provide a 0 dBm headset output with a signal input of 155 millivolts, following the

procedure in table 4-6, steps 1, 2.

g. Set the input signal level to 49 millivolts, (-30 dBm input to the module) and observe the syllabic lamp, DS1002, in

the selector module. Adjust the control R1003 (fig. FO-16) on the circuit board to the-point where the lamp just begins to

glow visibly, a faint red. This adjustment may be made at a higher or lower input level, depending on the requirements of

the system. This completes the final' receiving circuits adjustments.

3-7. CIRCUIT ALIGNMENT

The radio channel control requires no alignment in addition to the foregoing adjustments described in this section.

3-5