Homing Operation Test

TM 11-6625-601-34

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

SQUELCH DIS TONE lamp DS3, SQUELCH

DIS SEC lamp DS4, ODD MC lamp DS11, EVEN

positions applies a ground to the associated

lamp in the simulator. When set to the squelch

MC lamp DS12, SQUELCH DIS CARR lamp

tone position, t h e squelch control on the

DS5, and motor control unit A2. Regulated

+27.5 volts dc is also applied through isolation

C-3835/ARC-54 applies ground through pin X of

diode A2CR6 to HAR FIL lamp DS2, through

jack J101 and pin 9 of plug P4 to SQUELCH DIS

isolation diode A2CR7 to PTT INT SEC TONE

TONE lamp DS3, causing the lamp to light. Sett-

lamp DS7 and PTT SEC lamp DS6, and to a vol-

ing the squelch control switch on the

tage regulator composed of resistor A1R1 and

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

applies a ground through pin V of jack J101 and

Zener diodes A1CR2 and A1CR1. The +18.2-volt

pin 12 of plug P4 of SQUELCH DIS SEC lamp

dc output from the voltage regulator is applied

DS4, causing the lamp to light. When set to the

to audio amplifiers A1Q1, A1Q2, and A1Q3, and

emitter followers A1Q4 and A1Q5. Regulated

squelch carrier position, the squelch control

+18.2 volts dc is also applied through resistor

switch on the C-3835/ARC-54 applies ground

A 2 R l to pin 10 of FUNCTION SELECTOR

through pin W of jack J101 and pin J of jack

switch S3 for use as simulated homing signals.

J1 to the security device. From the security

Unless otherwise indicated, POWER switch S2

device, ground is applied through pin D of jack

is set to ON for the discussions in b through g

J1 and pin 8 of plug P4 to SQUELCH DIS CARR

below.

lamp DS5, causing lamp DS5 to light.

b. Frequency

Test.

The

Selection

d. Homing Operation Test. A voltage that

FREQUENCY MC readout counter, ODD MC

simulates left, right, and over-target homing

lamp DS11, EVEN MC lamp DS12, and HAR

signals originates in the simulator. The voltage,

FIL lamp DS2 on the simulator give visual indi-

applied to

FUNCTION

contact

cations of the operation of the frequency selec-

S E L E C T O R switch S3A (front), is routed

tor circuit i n t h e C - 3 8 3 6 / A R C - 5 4 . T h e

through switch S3A to the vertical and horizon-

FREQUENCY MC readout counter indicates

tal needles in INDICATOR ID-48/ARN. Setting

the frequency selected by the

exactly

switch S3 to LEFT applies a simulated left hom-

C-3835/ARC-54. Lamps DS11, DS12, and DS2

ing signal, through contacts 10 and 1 of switch

light when odd-MHz frequencies, even-MHz fre-

S3A (front), pin 19 of plug P4, and pin B of jack

quencies, and frequencies below 46 MHz respec-

J2, to the vertical needle in the ID-48/ARN.

tively, are selected. Setting the frequency selec-

Ground for the simulated left homing signal is

tor switches on the C-3835/ARC-54 to a specific

applied, through contacts 5 and 6 of switch S3A

frequency codes the unit MHz and 0.05 MHz

(front), pin 17 of plug P4, and pin t of jack J101,

control wires. This coded information is applied

t o the CX-3835/ARC-54. Ground from the

through jack J101 and plug P4 to FREQUENCY

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

MC counter switches S4 and S5. From switches

J101 and pin A of jack J2 to the vertical needle

S4 and S5, coded information is applied to motor

circuit in the ID-48/ARN. Setting switch S3 to

control unit A2. The motor control unit rotates

RIGHT applies a simulated right homing signal,

switches S4 and S5 and the counter until the

through contacts 10 and 2 of switch S3A (front),

selected frequency appears in the window of the

pin 17 of plug P4, and pin t of jack J101, to the

FREQUENCY MC readout counter. Selecting

C-3835/ARC-54. From the C-3835/ARC-54, the

an odd-MHz frequency lights ODD MC lamp

s i m u l a t e d right homing signal is applied

DS11

ground

applying

from

the

through pin s of jack J101 and pin A of jack J2

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

to the vertical needle circuit in the ID-48/ARN.

pin 32 of plug P4. Selecting an even-MHz fre-

Ground for the simulated right homing signal

quency lights EVEN MC lamp DS12 by applying

is applied, through contacts 5 and 7 of switch

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

S3A (front), pin 19 of plug P4, and pin B of jack

of jack J101 and pin 37 of plug P4. Selecting any

J 2 , to the vertical needle circuit in the

frequency below 46 MHz lights HAR FIL lamp

ID-48/ARN. Setting switch S3 to OVER TGT

DS2

ground

applying

from

the

applies a simulated over target homing signal,

C-3835/ARC-54 through pin K of jack J101 and

through contacts 10 of 3 of switch S3A (front),

pin 4 of plug P4.

pin 20 of plug P4, and pin MM of jack J101, to

c. Squelch Control Test. Ground for the

the C-3835/ARC-54. From the C-3835/ARC-54,

squelch tone, squelch disable and squelch car-

the simulated over target signal is applied

r i e r modes of operation originates in the

through pin NN of jack J101 and pin C of jack

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

J 2 to the horizontal needle circuit in the

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