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Chapter 1. INTRODUCTION - TM-11-6625-601-340009
Up
TM-11-6625-601-34 Maintenance Kit Electronic Equipment MK-733/ARC-54 (NSN
Next
Retransmit and Receive Audio Signal 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
10
of
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
by
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
by
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
1-2

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