Oscillator Control C-4311/PRC-47 (A8A7)

TM 11-5820-509-35

thoroughly stabilized before each

off position until instructed to apply

calibration.

primary power.

(3) Measure the output frequency at

(1) Connect the test equipment to the test

connector 500 KHZ A3.

The reading must be

fixture es shown in figure 6-16. (The connections for the

500,000.00 0.05 Hz. Adjust capacitor C1 (on top of

remaining test instruments are detailed in the

the module) until this reading is obtained.

appropriate procedural steps below.)

6-16. Oscillator Control C-4311/PRC-47 (A8A7)

(2) Verify that Radio Frequency Oscillator 0-

(fig. 7-14)

1032/PRC-47 is seated securely in its connector within

the test fixture.

a. Test Equipment and Material.

(3) Before installing Oscillator Control C-

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

4311/PRC-47 in the test fixture, remove the top cover.

(2) Multimeter ME-26A/U

NOTE

(3) Oscilloscope AN/USM-50

Verify that the coupling halfs on the

(4) Power Supply 124 volts dc) Harrison

drive end of the C-4311 /PRC-47 are

6202B (or equal)

in the positions shown in figure 3-63

(5) Signal Generator SG-103/URM-25F (2)

and that the controls (S1 and S2) on

required)

the front of the test fixture are in

(6) Test fixture for C-4311/PRC-47 with

positions O and OO respectively

Radio Frequency Oscillator 0-1032/PRC-47 installed.

before installing the module in its

b. Test Conditions and Equipment Connections.

connector.

CAUTION

(4) Carefully install the module in the test

Before connecting the power supply

fixture and place the power ON-OFF switch to ON. Turn

to the test fixture, set the output

on the power supply and adjust the output voltage of the

voltage to 19.0 2.0 volts dc; then

24-volts dc power supply to 20.0 0.2 volts dc.

return the power on-off switch to the

Figure 6-16. Oscillator Control C-4311/PRC-47 (A8A7) , Performance Tests, Initial Test Equipment Connections.

6-31