Figure 4-4. AN/PRR-9(XE-9) audio frequency response test.

TM 11-5820-549-50-1

Figure 4-4. AN/PRR-9(XE-9) audio frequency response test.

Frequency. cps

Response

d. Set

the

receiver

volume

control

1,000

0 db reference level

approximately mid-position (squelched operation).

150

-8 db or greater

e. TS-352 meter indication shall not exceed 10.0

300

-4db 2

milliamperes.

600

0 db u2

2,500

-4 db 2

4-12. AN/PRR-9(XE-9) Local Oscillator and 10.245

5,000

-8 db or greater

MHz Oscillator Tests

4-10. AN/PRR-9(XE-9) Audio Distortion Test

For these tests the receiver electronic unit assembly

must be removed from the receiver case.

a. Connect the test equipment as shown in figure

4-5.

4-7.

b. Set the PP-3514/U for 3.2 +0.1 volts input to the

b. Set the PP-3514/U for 3.2 0.1 volts input to the

receiver.

c. Set the AN/URM-103 for 5,000 microvolt output

c. Set the receiver volume control to mid-position.

level at the receiver channel frequency with +8.0 kc

d. Hold capacitor firmly to pad 24 (Z1-6) on printed

deviation at 1000 cps.

circuit board (fig. 2-1) so that capacitor lead penetrates

d. Set the TS-585A/U for 150 ohms.

protective varnish.

e. Set the receiver volume control to squelch "off"

e. Note frequency indication on AN/USM-207.

operation and adjust for a 3.5 milliwatt level as indicated

Frequency shall be within +.008 percent of frequency

on the TS-585A/U.

stamped on case of receiver crystal, Y1.

f. Adjust

the

TS-723A/U

for

distortion

f. Hold capacitor firmly to pad 49 (Z2-5) on printed

measurement and note the distortion indication which

circuit board (fig. 2-1) so that capacitor lead penetrates

shall not exceed 10 percent.

protective varnish.

g. Note frequency indication on AN/USM207.

4-11. AN/PRR-9(XE-9) DC Power Consumption Test

Frequency shall be 10.245 MHz 008 percent.

a. Connect the test equipment as shown in figure

4-13. AN/PRR-9(XE-9) I.F. Selectivity Test

4-6.

b. Set the PP3514/U for 3.2 0.1 volts input to the

For this test the receiver electronic unit assembly must

be removed from the receiver case.

receiver.

a. Connect the test equipment as shown in figure

c. Set the TS-585A/U for 150 ohms.

4-8.

4-4