ALINEMENT PROCEDURE - TM-11-5820-401-34-30461

TM 11-5820-401-34-3/0967-LP-432-3060

LOCAL OSCILLATOR A1500 ALTERNATE ALINEMENT PROCEDURE. (CONT)

5-17.

INITIAL EQUIPMENT CONTROL SETTINGS. Change the final settings used in the CRS test as follows:

1. Set R-442/VRC MC-TUNE-KC control to 30.00 MHz.

2. Set AN/USM-207 SENSITIVITY switch as necessary to trigger frequency counter.

ALINEMENT PROCEDURE

1.Connect M&26(*)/U positive lead to TP3001 (1) and negative lead to ground. (See test setu~

diagram

NOTE

In the following adjustments, it may not be possible to achieve zero-frequency error and

zero-vdc indication on the ME-26(*)/U. Local oscillator tolerance with the CRS con-

nected is 3.5 kHz. The ME-26(*)/U should not exceed 0.5 vdc.

2. Adjust L1502 (2) for 41.5-MHz reading on counter and zero vdc (midscale) on ME-26(*)/U.

3. Set R-442/VRC MC-TUNE-KC control to 52.00 MHz.

4. Adjust L1501 (3) for 63.5-MHz reading on counter and zero vdc (midscale) on ME-26(*)/U.

5 Set R-442/VRC to 42.00 MHz.

6. Adjust C1501 (4) for 53.5-MHz reading on counter and zero vdc (midscale) on ME-26( *)/U.

7. Set R-442/VRC to 30.00 MHz.

8. Repeat steps 2 through 6 until ME-26(*)/U reads zero vdc for all three frequencies.

9. Reconnect P1004 to J1004.

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