Squelch Control Test - TM-11-6625-601-340013

TM 11-6625-601-34

unit MHz control wires, designated A through

simulator, causing the lamp to light. Setting

E, are connected, through jack J101 on the

switch on

control

the

squelch

the

C-3835/ARC-54 and CONT UNIT jack J16 on the

C-3835/ARC-54 to the squelch disable position

simulator, to CONTROL UNIT TEST switch

applies ground through pin V of jack J101 to pin

S12. From switch S12, the unit MHz control

V of jack J16 on the test set. From pin V of jack

route

TEST FUNCTION

wires

through

J16, ground routes, through contacts 6 and 7 of

SELECTOR switches S11 and S10, and jack J33,

switch S11E (front), contacts 10 and 7 of switch

to the FREQUENCY MC readout counter in the

S 1 0 D (front), and pin 12 of jack J33, to

simulator. The fractional MHz control lines,

SQUELCH DIS SEC lamp DS4 in the simulator,

designated A through E, are connected, through

causing the lamp to light. Selecting the squelch

jack J101 on the C-3835/ARC-54 and jack J16

carrier mode of operation applies ground from

on the simulator, to switch S11. From switch

the C-3835/ARC-54, through pin W of jack J101,

S 1 1 , the fractional megacycle control lines

pin W of jack J16 on the test set, contacts 6 and

route through switch S10 and jack J33 to the

7 of switch S11C (front), contacts 10 and 11 of

F R A C T I O N A L MC readout counter in the

switch S8A (rear), and contacts 2 and 11 of

simulator. Lamps DS11, DS12, and DS2 light

switch S10D (front), to pin 8 of jack J33. From

w h e n odd-MHz frequencies, even-MHz fre-

pin 8 of jack J33, ground is applied to SQUELCH

quencies, and frequencies below 46 MHz, respec-

DIS CARR lamp DS5 in the simulator, causing

tively, are selected. Selecting an odd-megahertz

the lamp to light.

ground

from the

frequency

applies a

c. Homing Operation Test. A voltage that

C-3835/ARC-54, through pin h of jack J101, pin

simulates left, right, and over-target homing

11 of jack J16 of the test set, contacts 9 and 10

signals originates in the simulator. The voltage,

of switch S11E (front), and contacts 11 and 8 of

contact

FUNCTION

applied to

switch S10C (rear), to pin 32 of jack J33. From

SELECTOR switch S3A (front), routes through

pin 32 of jack J33, the ground is applied to lamp

switch S10 to the vertical and horizontal needle

DS11 in the simulator, causing the lamp to light.

c i r c u i t s in INDICATOR ID-48/ARN. Setting

Selecting an even-megahertz frequency applies

switch S3 to LEFT applies a simulated homing

a ground from the C-3835/ARC-54, through pin

signal, through contacts 10 and 1 of switch S3A

i of jack J101, pin i of jack J16 on the test set,

(front), pin 19 of plug P4, and contacts 11 and

contacts 3 and 4 of switch S11B (rear), and con-

2 of switch S10E (front), to the vertical needle

tacts 11 and 8 of switch S10E (rear), to pin 37

circuit in the ID-48/ARN. Ground for the

of jack J33. From pin 37 of jack J33, the ground

simulated homing signal is applied, through

is applied to lamp DS12 in the simulator, which

contacts 5 and 6 of switch S3A (front), pin 17

causes the lamp to light. Selecting any fre-

of plug P4, contacts 7 and 10 of switch S10C

quency 46 megahertz or below applies a ground

(front), and contacts 1 and 12 of switch S11C

from the C-3835/ARC-54, through pin K of jack

(front), to pin t of jack J16. From pin t of jack

J101, pin K of jack J16 on the test set, and con-

J16, ground is routed through pin t of jack J101

to the homing circuit in the C-3835/ARC-54.

tacts 9 and 10 of switch S11B (rear), to pin 4

of jack J33. From pin 4 of jack J33, the ground

Ground from the homing circuit in the

is applied to lamp DS2 in the simulator, causing

C-3835/ARC-54 is applied through pin s of jack

the lamp to light.

J101 and pin s of jack J16 on the test set to the

vertical needle circuit in the ID-48/ARN, caus-

b. Squelch Control Test. Ground for the

ing the vertical needle to swing to the left. Sett-

squelch tone, squelch disable, and squelch car-

ing switch S3 to RIGHT reverses the ground

r i e r modes of operation originates in the

and the simulated homing signal applied to the

C-3835/ARC-54. Setting the squelch control

vertical needle circuit in the ID-48/ARN, which

switch on the C-3835/ARC-54 to one of three

causes the vertical needle to swing to the right.

positions applies a ground to the associated

Setting switch S3 to OVER TGT applies a

lamp in the simulator. Selecting the squelch

simulated over-target homing signal, through

tone mode of operation on the C-3835/ARC-54

contacts 10 and 3 of switch S3A (front), pin 20

applies a ground, through pin X of jack J101,

pin X of jack J16 on the test set, contacts 9 and

of plug P4, contacts 2 and 5 of switch S10D

10 of switch S11C (front), contacts 7 and 8 of

(rear), and contacts 4 and 3 of switch S11C

TONE SECURITY switch S8A (rear), and con-

(front), to pin MM of jack J16. From pin MM of

tacts 6 and 3 of switch S10D (front), to pin 9 of

jack J16, the simulated over-target homing

signal is applied through pin MM of jack J101

jack J33. From pin 9 of jack J33, ground is

to the homing circuit in the C-3835/ARC-54. The

applied to SQUELCH TONE lamp DS3 in the

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