Cobra Electronics MR F75 - Manual (Page 38)

Nothing comes close to a Cobra ®
Specifications
71
Specifications
•
General
Number of Channels All U.S.A., Canadian, and International
10 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
Operating Your Radio
No display on LCD when
radio is turned On Improper power
connection Insure power connections
are proper and secure
Will transmit at
one (1) watt, but not
at 25 watts Selected channel is
limited to one (1) watt Switch to
another channel
Will not transmit Selected channel is
limited to receive only Switch to
another channel
No sound from speaker Volume level is too low or
squelch level is too deep Readjust volume
and squelch
No answer to calls Out of range of
other station
Signal is blocked
by terrain
Switch to high power
(25 watts) or move closer
Move until you have
a “line-of-sight” to
the other station
DSC distress
cannot be sent MMSI
(DSC self-identification)
number is not entered Enter your MMSI number
70 English
Maintenance And
Troubleshooting
Problem Possible Cause(s) Solution(s)
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
•