Amplifier-Modulator AM-3507/PRC-47 (A8A2)

TM 11-5820-509-35

and J12. The cw oscillator output frequency shall be

(8) Power Supply (-110 volts dc), Harrison

800 50 Hz.

6207B, or equal

(4) Operate the KEY switch between the

(9) Resistance Decade Box MX-3991/V

MOM ON and OFF positions and observe the

(10) Signal Generator SG-103/URM-25F

waveshape on the oscilloscope and listen to the output

(11) Spectrum Analyzer AN/UPM-110

tone in the loudspeaker. The tone must be free from

(12) Test fixture for AM-3507/PRC-47 (fig. 6-

chirps and clicks, and the waveform shall display no

sharp transients.

(13) Voltmeter ME 30A/U

(5)

When the KEY switch is held ON, the

b. Test Conditions and Equipment Connections.

VOX ON lamp lights.

CAUTION

6-11. Amplifier-Modulator AM-3507/PRC-47 (A8A2)

Before

connecting

the

power

(fig. 7-10)

supplies to the test fixture, set their

a. Test Equipment and Material.

output voltages to 26.0 2.0 volts

(1) Audio Oscillator TS-382/U

and -110 5 volts respectively. Then

(2) Converter (for spectrum analyzer),

return the power on-off switches to

Hewlett-Packard K15-8551B

the off position until instructed to

(3) Distortion Analyzer TS-723/U

apply primary power to them.

(4) Frequency Counter AN /URM -79/U

(1) Connect the test instruments to the test

(5) Multimeter ME-26A/U

fixture as shown in figure 6-12. (The connections for the

remaining test equipment are detailed in the appropriate

(6) Oscilloscope AN/USM-50

procedural steps below.)

(7) Power Supply (24 volts dc), Harrison

6202B, or equal

Figure 6-12. Amplifier-Modulator AM 3507/PRC-47 (A8A2), Performance Tests, Initial Test Equipment

Connections.

6-16