Performance Check and Troubleshooting C-2299/VRC Using Test Box

11-5820-401-35-1/NAVELEX

0967-432-3020

transmitter and J701 of C-2299/VRC as shown in

(b) Turn on the power supply and adjust

figure 25. The required items are listed in para-

its output to 25.5 volts.

graph 3-5b (2).

(c) Set the C-2299/VRC RAD TRANS

(b) Turn on adjust the output of the

switch to OFF.

power supply to 25.5 volts.

(d) Arrange for the retransmission site

(c) Turn on the receiver-transmitter and

radios to operate on two frequencies (F1 and F2)

adjust it to operate on any convenient frequency.

at least 10 MHz apart and to operate in satisfac-

Note the AN/URM-120 indication for low output

tory squelch mode between the terminal radios

power transmission.

and each retransmission site radio.

(d) Proceed to c below to troubleshoot and

(e) Connect the audio accessories to the

test the performance of the C-2299/VRC.

C-2299/VRC.

b. Performance Check and Troubleshooting C-

(f) Proceed to b below to troubleshoot and

2299/VRC Using Retransmission Radio Sets (fig.

test the performance of the C-2299/VRC.

31). Connect the equipment and adjust the re-

(2) Using test box (fig. 2-5). When the test

transmission site radios as explained in a (1)

box will be used to troubleshoot the C-2299/VRC,

above. Perform the operations in the sequence

proceed as follows:

given below and the indicated corrective measures

when normal indications are not obtained.

(a) Connect the test box to the receiver-

Action

c. Performance Check and Troubleshooting C-2299/VRC Using Test Box (fig. 2-5). Connect the

equipment as explained in a (2) above. Perform the operations given in the following chart and the

indicated corrective measures when the normal indication is not obtained:

3-7