Specifications

TM 11-5820-670-30
2-36. LOCAL OSCILLATOR ALINEMENT. (CONT)
CONTROL UNIT
FREQUENCY COUNTER
FREQUENCY (MHz)
READOUT (MHz)
A BAND
B BAND
30.00
53.00
41.50 ± 0.002
42.00
65.00
53.50 ± 0.002
52.00
75.00
63.50 ± 0.002
3. If frequency reading is not within tolerances of table, perform the following adjustments.
4. Remove J1004 from
-
P1004 on receiver-transmitter. This removes lock-in.
5. At 30.00 MHz, adjust L1502 until reading on frequency counter is 41.50 ± 0.002 MHz.
Switch to 42.00 MHz and adjust C1501 until frequency counter reading is 53.50 ± 0.002
MHz. Switch to 52.00 and adjust L1501 until frequency counter reading is 63.50 ± 0.002 MHz.
6. Replace J1004 and check frequencies. It maybe necessary to repeat step 5 a few times since
components affect each other.
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