SILICON VERSION A5300A SQUELCH FILTER ALINEMENT.

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

SILICON VERSION A5300A SQUELCH FILTER ALINEMENT.

4-23.

PURPOSE. This procedure adjusts the gain of Squelch Amplifier A5200 in the NEW SQUELCH mode

of operation. By adjusting Resistor R5301 in the squelch filter, the filter is properly tuned to attenuate

the 150-Hz squelch tone, thus providing maximum degenerative feedback to the squelch amplifier for

all frequencies other than 150 Hz. This permits the squelch amplifier to provide maximum gain for 150-

Hz signals. Alinement of Squelch Filter A5300 (paragraph 4-22) must be done before Squelch Am-

plifier A5200 Alinement, NEW SQUELCH level, covered in paragraph 4-24.

TEST EQUIPMENT AND MATERIALS

T-Connector UG-274/U

Test Set AN/GRM-114 A

Attenuated Probe

Maintenance Kit MK-1978/VRC

Power Supply PP-1104(*)/G

Rf Cable RG-58AJ

TEST SETUP. Connect the equipment as shown in test setup diagram

. Remove R-442/VRC top

INITIAL EQUIPMENT CONTROL SETTINGS. Set equipment controls as indicated in the following

table. Inject 1000-v rf at 30 MHz, 150-Hz modulation; 2-kHz deviation.

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