Cobra Electronics MRF45 owner manual Maintenance Troubleshooting, Specifications

Maintenance And

Troubleshooting

Operating Your Radio

Maintenance

•

Very little maintenance is required to keep your CobraMarine VHF radio in good operating condition.

■Keep the radio clean by wiping with a soft cloth and mild detergent. Rinse with fresh water. Do not use solvents or harsh or abrasive cleaners, which could damage the case or scratch the LCD screen.

■If the radio is exposed to salt water, rinse it in fresh water at least once a day to prevent build-up of salt deposits, which could interfere with button operation.

Troubleshooting		•
Problem	Possible Cause(s)	Solution(s)
No display on LCD when	Improper power	Insure power connections
radio is turned On	connection	are proper and secure
Will transmit at	Selected channel is	Switch to
one (1) watt, but not	limited to one (1) watt	another channel
at 25 watts
Will not transmit	Selected channel is	Switch to
	limited to receive only	another channel
No sound from speaker	Volume level is too low or	Readjust volume
	squelch level is too deep	and squelch
No answer to calls	Out of range of	Switch to high power
	other station	(25 watts) or move closer
	Signal is blocked	Move until you have
	by terrain	a “line-of-sight” to
		the other station
DSC distress	MMSI	Enter your MMSI number
cannot be sent	(DSC self-identification)
	number is not entered

Operating Your Radio	Specifications
Specifications	•
General

Number of Channels	All U.S.A., Canadian, International and all
	NOAA Weather Channels
Channel Spacing	25 kHz
Modulation	5 kHz Max.
Input Voltage	13.8 VDC
Current Drain:
Stand-by	20 mA
Receive	200 mA
Transmit	5A @ High power 1A @ Low
Temperature Range	-20˚ C to 60˚ C
Unit Dimensions	6.25" x 2.25" x 7.125"
	(15.9 cm x 5.7 cm x 18 cm)
Unit Weight	2 lbs., 6.8 oz. (1100 g)
Receiver
Frequency Range	156.050 to 163.275 MHz
Receiver Type	Double Conversion Super-Heterodyne
Sensitivity:
20 dB Quieting	0.35 uV
12 dB Sinad	0.30 uV
Adjacent Channel Selectivity	-60 dB
Intermodulation and Rejection	-60 dB
Spurious and Image Rejection	-60 dB
AF Output	4 Watts @ 8 Ohms
Transmitter
Frequency Range: TX	156.025 to 157.425 MHz
RF Output Power	1 and 25 Watts
Spurious Emissions	-60 dB High -55 dB Low
Microphone Type	Electret
Frequency Stability	+/-10 ppm
FM Hum and Noise	40 dB

66 English Nothing Comes Close to a Cobra® 67