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Table 1-1. 0.05-Megahertz Coding
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TM-11-6625-601-34 Maintenance Kit Electronic Equipment MK-733/ARC-54 (NSN
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Test Set, Radio TS-1967/ARC-54 Audio Amplifier A1
TM 11-6625-601-34
Table 1-2. Whole-Megahertz Coding-Continued
m o t o r s operate until switches S4 and S5,
1-11. Frequency Readout Assembly Circuit
mechanically connected to motors B2 and B1,
respectively, remove ground from relays K1 and
a. General. The frequency readout assembly
K2. Relays K1 and K2 reenergize, removing
in the SM-349/ARC-54 consists of a frequency
operating voltage from motors B1 and B2. For
readout counter, a motor control assembly, and
a sequence of operation, assume that a fre-
two drive motors. Operation of the frequency
quency of 51.05 megahertz has been selected on
readout assembly adheres to the principles of
t h e TS1967/ARC-54 or the C-3835/ARC-54.
a five-wire reentrant system. For a discussion
Operation of the whole-megahertz readout cir-
of a basic five-wire reentrant system refer to
cuit (S5A) is discussed in b below. Operation of
paragraph 1-10b. Coding of the input frequency
the 0.05 megahertz circuit (S4A) is discussed in
c o n t r o l lines is obtained from either the
c below.
TS-1967/ARC-54 or the C-3835/ARC-54. Select-
b. Operation of Whole Megahertz Readout Cir-
i n g a specific frequency applies ground to
cuit. The code for 51 megahertz puts ground on
FREQUENCY SELECTOR-MC switches S4 and
megahertz select line B and megahertz
S5. These grounds are routed to relays K1 and
ambiguity select line B. The ground on
K2 in motor control unit A2. Relays K1 and K2
megahertz select line B is applied through con-
energize,  a p p l y i n g operating voltage from
tacts 19 and 1 of switch S5A (rear) and terminal
POWER switch S2 to motors B1 and B2. The
1-13

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