Figure 4-18. CMAX/C MIN Adjustment Locator

TM 11-5820-873-34

of the coil wire. It should be between 1/4 and S/4 inch.

If not, move roller (2) away from plunger and adjust

plunger length as necessary. Repeat steps 2 and 3 until

adjustment is within tolerance.

(4)

Connect multimeter between L MIN

plunger (1) and chassis ground. Rotate inductor to

move roller (2) in contact with L MIN plunger. Stop

when roller/plunger contact causes meter to indicate a

short.

(5)

Check the distance from the roller to

the end of the coil wire. It should be between 1/ and /4

inch. If not, move roller (2) away from plunger and

adjust plunger length as necessary. Repeat steps 4 and

5 until adjustment is within tolerance. Reinstall antenna

coupler in case.

Amplitude Detector Adjustment. (Fig 4-20)

(1)

Remove case from Antenna Coupler

CU2229/URC-92.

Connect RF and control cables

between the Antenna Coupler and Receiver/Transmitter

RT-1277/URC-92. Ensure the receiver/transmitter is

correctly powered and grounded.

(2)

Loosen fasteners and swing Phase

and Amplitude Control CCA away from chassis.

Disconnect and isolate RF line from terminal post (1).

Connect clip leads of a BNC/clip lead cable (fig 4-1) to

terminal post (1) and ground post (2) Connect a 50 ohm

dummy load to BNC/clip lead cable.

NOTE

Cable clip leads should not exceed 1

inch in length. Overall cable length

should not exceed 6 inches.

Figure 4-18. CMAX/C MIN Adjustment Locator

Figure 4-19 LMAX/L MIN Adjustment Locator

4-45