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Introduction
57
Nothing Comes Close to a Cobra
®
56
English
Operating Your Radio
Maintenance and
Troubleshooting
No display on LCD when
radio is turned On
Batteries are exhausted
Batteries not installed
properly
Recharge or
replace batteries
Remove batteries and
reinstall according to
polarity markings
Batteries run
down quickly
Batteries are at the
end of their life
Replace with new
batteries
Will transmit at
one (1) or three (3) watts,
but not at
six (6)
watts
Batteries are low
Selected channel is limited
to one (1) watt
Recharge or
replace batteries
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
Re-adjust volume
and squelch
No response to
button press
Button lock is On Press and hold Backlight/
Key Lock button
No answer to calls Out of range of
other station
Signal is blocked
by terrain
Switch to Medium or High
transmit power or move
closer.
Problem Possible Cause(s) Solution(s)
Maintenance
•
Very little maintenance is required to keep your Cobra VHF/GMRS radio
in good operating condition:
■
Keep the radio and charger clean by wiping with a soft cloth and mild detergent.
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, wipe with a soft, moist cloth at least once a
day to prevent buildup of salt deposits, which could interfere with button
operation.
■
If the radio will be stored for a long period, such as over the winter,
remove the batteries from the battery tray and store them in a separate
package. This is especially important if you are using alkaline batteries.
Troubleshooting
•
Specifications
Specifications
•
General
Number of Channels All U.S., Canadian, and International
NOAA Weather Channels, 15 GMRS
Channels
Channel Spacing VHF - 25 kHz Max., GMRS - 12.5 kHz
Modulation VHF - 5 kHz Max., GMRS - 2.5 kHz
Input Voltage 7.4 VDC
Battery Life: Lithium-ion: 8 hrs @ High Power,
5% TX, 5% RX, 90% Stand-by 14 hrs @ Low Power;
Current Drain:
Stand-by 45 mA
Receive 150 mA
Transmit 1.8 A @ High power 650 mA @ Low Power
Temperature Range -20˚C to 50˚C
Radio Dimensions 4.8 in. x 2.4 in. x 1.4 in.
(123 mm x 62 mm x 36 mm)
not including antenna
Radio Weight 0 lbs 8 oz. (228 g) without batteries
Receiver
Frequency Range VHF 156.050 to 163.275 MHz
GMRS 462.5500 to 467.7250 MHz
Receiver Type Marine VHF: Double Conversion Super-Heterodyne
GMRS & WX: Low if direct conversion.
Sensitivity (typical): Marine VHF: 12 dB Sinad: -121 dBm
Adjacent Channel Selectivity Marine: 70dB, GMRS: 50dB, WX: 55dB (typical)
Intermodulation and Rejection Marine: 70dB, GMRS: 65dB, WX: 55dB (typical)
Spurious and Image Rejection Marine: 70dB, GMRS: 50dB, WX: 65dB (typical)
AF Output 400 mW < 5% distortion @ 8 ohms
Transmitter
Frequency Range: TX VHF 156.025 to 157.425 MHz
GMRS 462.5500 to 462.7250 MHz
RF Output Power Marine:1, 3 & 6 Watts/GMRS: 1, 2 & 3 Watts
Spurious Emissions -60 dBc @ High Power, -55 dBc @ Low Power
Microphone Type Condenser
Frequency Stability +/-5 ppm
FM Hum and Noise 40 dB
Specifications subject to change without notice.
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