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Other Directives.
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SB-740-5821-91-004 Radio Set AN/ARC-54 Manual
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Transmitter power output


(10) Inspect solder connections for missing
Applicable
Qty
Literature
Reqd
Equipment
solder, cold solder, insufficient solder, excessive
Resistor, 150 ohms ± 5%, 1
solder, and improper wrap.
½ watt
(11) Inspect for illegible, incorrect, or missing
Resistor, 470 ohms ± 5%, 1
markings.
½ watt
Capacitor, 0.2 ufd, 400 vdc 1
(12) Inspect for corrosion, dirt, moisture, and
fungus.
(1) Standard conditions. Standard conditions
(13) Inspect all hardware and parts for dam-
hereafter referred to, will be as follows or as
age and condition.
otherwise specified:
(14) Inspect the equipment for applicable
(a) Power supply voltage: 27.5 ± 0.5 volts
modification work orders. A listing of current
dc.
modification work orders will be found in DA
(b) Radio set turned to ON, the OFF-
Pam 310-7.
PTT-RETRAN-HOME control set to PTT.
d. Bench Test Requirements. Bench tests are re-
(c) Warmup time: One minute.
quired to assure that the equipment operates satis-
(d) Operational duty cycle: 1 minute
factorily and has not been damaged in shipping
transmit, 10 minute receive.
and handling. Radio Sets AN/ARC­54 ( ) in
(e) Output impedance: RF­52 ohms, audio
storage for a period of time are subject to de-
150 ohms.
terioration and bench tests shall be conducted on
(f) Output level: RF 10 watts, audio 50
all items prior to shipment, and at required in-
milliwatts, (2.73 Vrms across 150 ohms. )
tervals. The bench tests shall be conducted in a
(g) Input impedance: RF 52 ohms, audio
screen or RF shield room with the equipment
150 ohms.
under test arranged so the component parts and
(h) Transmitter input level: audio 0 dbm
adjustrnents are readily accessible. The power
at 1000 Hz (0.37 Vrms across 150 ohms).
source shall include suitable filtering and over-
load protection.
(2) Input requirements. (Electrical power).
Radio set AN/ARC-54 operates from a 27.5 volt
NOTE
dc power source having characteristics as defined
Equivalent test equipment may be sub-
in MIL-STD-704. A maximum of 7.4 amperes at
stituted.
27.5 volts dc is required under transmit conditions.
Table D­1. Test Equipment and Accessories
(3) Test procedures. Receiver-transmitter
RT­348( )/ARC­54 shall be installed in mount-
Applicable
Qty
Equipment
Literature
Reqd
ing MT-1535( )/ARC­54 when conducting the
RF Wattmeter AN/URM-
1
TM 11-6625-446-15
following tests. Suitable access holes shall be pro-
120
vided in the underside of the mounting and bottom
Audio Oscillator TS-382 A/U
1
TM 11-6625-261-12
plate used to allow adjustments to the transmit
Frequency meter AN/USM-
1
TM 11-6625-212-15
and receive audio modules specified herein.
26
Modulation meter ME-57/U
1
TM 11-6625-400-12
CAUTION
Vacuum Tube Voltmeter
1
TM 11-6625-239-12
Damage may occur to the receiver-trans-
TS 505/U
m i t t e r unit when inserted into the
1
Signal Generator AN/URM-
TM 11-1257
mounting with the dust cover removed.
48
Attenuator fixed (50 ohms
1
The damage can be prevented by ele-
20 db)
vating the back of the receiver-trans-
Indicator ID-1351/A
1
TM 11-5895-537-50
mitter unit during installation to insure
Indicator ID-48/ARN
1
TM 11-5840-270-50
proper alignment of the connectors.
Deviation Meter ARF AR-1B
1
(4) Transmitter tests. Refer to figure 1. Con-
Frequency Converter CV-
1
TM 11­6625-604-15
nect the RF wattmeter AN/URM­120 to the an-
394/USA-5
tenna receptacle on the rear of the receiver-
Mounting MT-1535 ( )/
1
ARC-54
transmitter with a convenient length of cable
Attenuator, 50 ohms, stepped
RG-58/U or RG-223/U.
2
in 1 db steps
CAUTIONS
Radio Set Control C-3835/
1
1. Do not transmit with the signal
ARC-54
g e n e r a t o r and pad connected to the
Test Harness
1
9


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