VHF Marine Radio Protocols
Intro Operation Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution Warning
Installation
Customer
Assistance
Operating Your Radio
15
Nothing Comes Close to a Cobra
®
Getting Started
Channel Up/Down Buttons
Your radio will Receive (Rx) and Transmit (Tx) VHF signals on
the channel indicated on the LCD display. You can change the
channel at any time using the Channel Up/Down buttons.
To Change Channels:
Press the Channel Up/Down button.
If you are on Channel 88, pressing the Channel Up
button will advance to Channel 01. If you are on Channel
01, pressing the Channel Down button will advance to
Channel 88.
You can press and hold the Channel Up/Down button
for fast advance. If the new channel selected is restricted
to low power, the radio will automatically switch to Low
Power mode and the Low Power icon will appear on the
LCD.
If the radio is in the Key Lock mode, the channel will not
change and the three (3) beep error signal will sound.
High/Medium/Low (H/M/L) Power Selection
Your radio can transmit selectively at 1, 3 or 6 watts of power.
Cobra suggests you maintain the low power setting for short-
range communications. You will conserve battery life and avoid
overpowering nearby stations with a low power setting signal.
Use the high power setting for long-range communications or
when you do not receive a response to a signal sent at 1 watt.
To Toggle Between H-M-L Power Modes:
Press the MORE soft key until the screen shows as illustrated.
Pres the H-M-L soft key to set the power 1W, 3W, or 6W.
The LCD will show which mode is in effect. Some channels
are restricted for a maximum use of 1 watt. Your radio will
automatically set the power to Low Power mode when you
select those channels.
Intro Operation Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution Warning
Installation
Customer
Assistance
NOTE
Some channels, frequency bands and countries of use
might not be able to operate in High Power mode.
Intro Operation Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution Warning
Installation
Customer
Assistance
NOTE
A few channels are Receive only and will not transmit in
these channels.
Channel Up/Down Buttons
88A
EMERGENCY
USA 6W
32 49.800N
999 11.077W
DATE:06/30
TIME:10:00 LOC
WX
MENU
CALL MORE
Currently On Channel 88
VHF Marine Radio Protocols
Intro Operation Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution Warning
Installation
Customer
Assistance
Operating Your Radio
14
English
Getting Started
MOB
SQL 16+
MARINE HH600 DSC+GPS
SCAN
H/M/L
MEM MORE
16A
EMERGENCY
USA 6W
32 49.800N
SOG: 3.7
KTS
COG: 015 M
999.11.077W
DATE:06/30
TIME:10:00 LOC
H/M/L Power Button
EMERG
USA 6W MEM
41° 54.523N
087° 47.192W
DATE:06/01
TIME:10:00
SCAN
H/M/L
MEM MORE
ROG
16
SCAN Button
SCAN
Press and release the SCAN soft key to scan all channels. Scanning
begins at the selected lower channel, and scans to higher channels.
Press the Channel Up/Down button to change the scan direction.
When a signal is received in SCAN mode, the radio will pause 10
seconds before resuming SCAN operation. The scan will stop on the
paused channel and remain there when the Talk button is pressed.
If memory channels are saved, press and release the SCAN button to
scan all memory channels.
Intro Operation Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution Warning
Installation
Customer
Assistance
NOTE
If even one memory channel is saved, SCAN will only scan
memory channels.
Squelch Control
Squelch Control lters weak signals and radio frequency (RF)
noise
so that you will clearly hear the signals you want.
The Squelch Control on this radio is set through the following
keypad operation.
To Set Squelch Control:
1. With the power On, press the SQL button to access the
squelch screen.
2. Press the Channel Up and Channel Down soft keys to set
level. The signal level graphic shows squelch level 1 - 8.
3. To adjust your squelch, press the Channel Down soft
key until you hear a hissing sound, then press
and release the Channel Up soft key until the hissing
stops. This will establish a “Baseline” squelch.
4. By pressing the Channel Up soft key further, you will lter
weak and medium strength signals. By pressing Channel
Down soft key, you will receive weaker signals.
5. Press the Enter soft key to save this entry and move to the
next Setup mode programming.
Intro Operation Customer
Assistance
Warranty
Notice
Main Icons
Secondary Icons
Caution Warning
Installation
Customer
Assistance
NOTE
If the Squelch is set so that you can hear a continuous
hissing
sound, the Memory Scan and Tri-Watch functions will be
unusable.
Squelch Control
MRHH600EU_ENG_MANL.indd 14-15 4/4/17 2:55 PM
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