Figure 3-4. AN/PRR-9(XE-9) local oscillator alinement, test setup.

TM 11-5820-549-50-1

Figure 3-4. AN/PRR-9(XE-9) local oscillator

alinement, test setup.

c. Adjust the TS-585A/U for an impedance of 150

ohms.

d. Set the TS421A/U for 150 Hz and adjust

deviation of AN/URM-103 for 2 kHz.

e. Set the PP-3514/U for 3.2 volts.

Figure 3-5. AN/PRR-9(XE-9) squelch sensitivity

f. Set the AN/PRR-9(XE-9) receiver control for

adjustment, test setup.

squelch "on" operation.

g. Adjust the squelch potentiometer, R5, fully

counterclockwise. Then slowly adjust R5 clockwise to

the setting where the current suddenly increases 10 to

12 milliamperes.

3-4