Operating Your Radio
29
Nothing Comes Close to a Cobra
®
VHF Mode Programming
USA/International/Canada Channel Maps
Three (3) sets of VHF Channel Maps have been established
for marine use in the USA, Canada, and the rest of the world
(International). Most of the channels are the same for all
three (3) maps, but there are definite differences (see table in
the Appendix on page 62). Your radio has all three (3) maps
built into it and will operate correctly in whichever area
you choose.
To Set Channel Map Operating Area:
1. The Channel Map mode is the second mode on
the Marine (VHF) Setup programming.
2. U, I and C will display, with the current setting
(the U icon is the default) flashing.
3. Press Channel Up/Down button to select the
U, I or C icon.
4. Press Call/Enter/Setup button to save this entry
and move to the next Setup mode programming.
VHF Marine Radio Protocols
Channel Up/Down Buttons
Squelch Control
Squelch Control filters 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, push and hold Call/Enter/Setup
button to access the Setup menu.
2. Squelch control will be the first menu item to appear.
Press the Channel Up and Channel Down buttons to
set level. The signal level bar graph shows squelch
level while you are in Setup mode on the squelch
adjust function.
3. To adjust your squelch, press the Channel Down
button until you hear a hissing sound, then press
and release the Channel Up button until the hissing
stops. This will establish a “Baseline” squelch.
4. By pressing the Channel Up button further, you will
filter weak and medium strength signals. By pressing
Channel Down button, you will receive weaker signals.
5. Press the Call/Enter/Setup button to save this entry
and move to the next Setup mode programming.
NOTE
If the Squelch is set so that you can hear a continuous
hissing sound, the Memory Scan and Tri-Watch
functions will be blocked.