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Operating Your Radio
Nothing Comes Close to a Cobra
®
Specifications
65
64
English
Maintenance and
Troubleshooting
Operating Your Radio
No display on LCD when
radio is turned On
Improper power
connection
Ensure power connections
are proper and secure
Will transmit at
1 watt, but not
at 25 watts
Selected channel is
limited to 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
Problem Possible Cause(s) Solution(s)
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 buildup of salt deposits, which could interfere with
button operation.
Troubleshooting
•
Specifications
•
General
Number of Channels All U.S.A., Canadian, and International
NOAA Weather Channels
Channel Spacing 25 kHz
Modulation 5 kHz Max.
Input Voltage 13.8 VDC
Current Drain:
Stand-by 100 mA
Receive 500 mA
Transmit 5A @ High power 1A @ Low
Temperature Range -4°F to 140°F (-20°C to 60°C)
Unit Dimensions 6.375" x x 6.25"
(162 mm x 76 mm x 159 mm)
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 0.20 uV
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
MRF80BD_MANL_OPER:F75-Operation-8 12/9/10 10:35 AM Page 64