SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.

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

5-25. A5200 SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL. (CONT)

Lift R-442/VRC A3000 tray (1). (See test setup diagram

Set ME-30(*)/U to 10-volt scale.

Connect ME-30(*)/U positive lead to TP5008 (2), and negative lead to ground.

Turn AN/URM-103 DEVIATION control clockwise until ME-30(*)/U reads 4 vat.

Remove ME-30(*)/U positive lead.

Adjust NEW Squelch Resistor R5217 (3) until R-442/VRC CALL light just comes on.

5-26. SILICON VERSION A5200A SQUELCH AMPLIFIER ALINEMENT, NEW SQUELCH LEVEL.

PURPOSE. This procedure adjusts the receiver sensitivity to the 150-Hz NEW SQUELCH tone.

TEST EQUIPMENT AND MATERIALS

Signal Generator AN/URM-103

Matching Unit CN-901/U

Frequency Counter AN/USM-207

T-Connector UG-274/U

Power Supply PP-1104(*)/G

Loudspeaker LS-454/U

Voltmeter ME-30(*)/U

T e s t Cable No. 1

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

. Remove R-442/VRC

top cover. (See paragraph 2-7.)

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

table. When using alternate equipment, inject 2000-v rf at 64 MHz, 150-Hz modulation; deviation as

per alinement requirements.

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