SILICON VERSION A5300A SQUELCH FILTER ALINEMENT.

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

3-23. A500 SQUELCH FILTER ALINEMENT. (CONT).

17. FREQUENCY BELOW 149 HZ. Turn R5301 (3) clockwise slightly. Reset AN/URM-127 FREQ

RANGE DIAL to obtain a peak reading on ME-30(*)/U.

18. Check frequency on AN/USM-207.

Repeat steps 17 and 18 until peak ME-30(*)/U reading is obtained at a frequency between 149

and 151 Hz.

3-24.

SILICON VERSION A5300A SQUELCH FILTER ALINEMENT.

PURPOSE. This procedure adjusts the gain of Squelch Amplifier A5200A in the NEW SQUELCH mode

of operation. Alinement of the A5300A squelch filter must be done before the Silicon Version Squelch

Amplifier A5200A Alinement, NEW SQUELCH Level, paragraph 3-26.

TEST EQUIPMENT AND MATERIALS

Matching Unit CN-901/U

Signal Generator AN/URM-103

T-Connector UG-274/U

Signal Generator AN/URM-127

Loudspeaker LS-454/U

Power Supply PP-1104(*)/G

Voltmeter ME-30(*)/U

Frequency Counter AN/USM-207

Maintenance Kit MK-1978/VRC

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

. Remove R-442/VRC top

3-115