Uniden MC480 User Manual

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MC 480
MARINE RADIOTELEPHONE

OWNERS MANUAL

UMIDEN MC480

The UNIDEN MC480 VHP marine radio transceiver has been designed to give you a
rugged reliable instrument that will provide you with years of trouble-free service.
You are encouraged to thoroughly read this manual to acquaint yourself with the
characteristic and operation of your transceiver so that you can contribute to the
longevity of your investment.

With proper care and maintenance, your UNIDEN MC480 will outlast your present
vessel and serve you well on board several more. The full features and flexibility
designed into this quality transceiver will prevent it from becoming obsolete

regardless of changes in craft or geographic locations. The unit may be mounted in
any number of convenient locations by utilizing the universal mounting bracket.
The technical excellence of the UNIDEN MC480 is demonstrated by the multiplici
ty of uses for which it has been found acceptable by the Department of Com
munications.

The UNIDEN MC480 is of all solid state design with conservatively rated rugged
components and materials compatible with the marine environment. The trans
ceiver utilize as a number of gaskets, sealing rings, waterproof membranes, and
other sealants to effect a splashproof housing for protection of the electronics.

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SPECIFICATIONS

GENERAL

Channels :

Frequency Control
Method :
Antenna Impedance : 50 ohms, nominal
Speaker : 2,85 Inch, 8 ohms
Microphone ;

Channel Display : LED numerical readout

DOC Approval :

Frequency Stability : ±0.0005%
Operating Tempera
ture Range :
Shock and Vibration :
Si 26 :
Weight : 4.5 LBS
Controls : On-Off/Volume, squelch & dimmer controls
Selector Switches :

Connectors ;

Frequency Range :

Lights and

Indicators :

Standard Accessories:

Supply Voltage :

Transmit 55

Receive 55

PUL synthesizer

Rugged 600 ohms dynamic element with coiled cord and
plug-in connector

Type approved under Australia Department of Communica
tions

-20‘’Cto +50“C
Meets or exceeds El A standards, RSI 52A and RS204A
7-1/4''W(185m/m) x9-7/8"L{250m/m) x 2-1/4"H(58m/m)

1W/25W power selector. Instant channel 16 and main
channel selector switches
Antenna, microphone, remote speaker, DC power

156 to 158 MHz transmit

156 to 163 MHz receive

Red/Green Transmit-Receive LED, Green 7 segment LED
Channel Readout, Low Power & Channel 16 LED

Plug-in microphone, mounting bracket and hardware, DC

power cord, mike hanger, spare fuse, owner's manual.

13.8V DC negative ground

TRANSMITTER

Power Output ; 25 or 1 watt (switch selectable)
Power Requirement : 25 watts output: 4.5A @ 13.8V DC.

1 watt output : 1 .OA @ 13,8V DC.

Modulation :

FM, ±5 kHz deviation (FCC designator 16F3)

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Hum and Noise
Attenuation
Audio Distortion

Spurious
Suppression
Output Transistor
Protection
Output Power
Stabilization

RECEIVER
Sensitivity

Threshold Squelch
Sensitivity
Tight Squelch
Sensitivity
Spurious Response
Attenuation
image Response
Attenuation
Intermodulation
Attenuation

Adjacent Channel
Rejection
Selectivity

Audio Output
Power

Power Requirement

IF Frequencies

Hum and Noise
Level

45 dB

Less than 5% with 3 kHz deviation with 1000 Hz modulat
ing frequency

-70 dB

Built-in

Built-in automatic level control (ALC)

-117 dBm for 12 dB SINAD

-114 dBm for 20 dB quieting

0.20 uV (EIA method)

2yV (EIA method)

75 dB

75 dB

70 dB @ 0,3 pV desired
50 dB @ 30 iJV desired
35dB@300AiV desired

70 dB (EIA method)
±7.5 kHz@6 dBdown
±15 kHz P 60 dB down

3,5 watts minimum at 10% distortion at 1 kHz modulation
and ±3.5 kHz deviation (4 ohm speaker)

0.6A P 13.8V DC, squelched
1,2A @ 13.8V DC at rated audio output
lst-21.4 MHz

2nd--455 kHz

-50 dB (EIA method)

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