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Cobra MR HH450 DUAL Manual

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Nothing Comes Close to a Cobra
®
VHF Marine Radio Protocols
Specifications
54
English
VHF Marine Radio Protocols
Operating Your Radio
Transmit (Tx) and Receive (Rx) Modes
Transmit (Tx) and Receive (Rx) modes gives you the ability to
interact with other GMRS radios. When you use this capability, be
sure to follow the procedures and to observe the courtesies that
govern its use so everyone benefits. (See pages XX through XX) to
help you select the proper channels.
When a talk transmission occurs, the following icons will be
displayed.
■ Transmit (Tx) Icon
■ Bar Graph Icon
To Transmit a Message:
1. Check to see that your radio is set to a proper channel for the
type of message you plan to send.
2. Toggle to the Low Power setting.
3. With the microphone about 2 in. [51 mm] from your mouth,
press and hold the Talk button and speak into the microphone.
The Transmit icon will appear on the LCD.
4. Release the Talk button when you are finished speaking. Your
radio can only operate in either Transmit (Tx) or Receive (Rx)
mode at any given time. You will not hear the response to your
message unless the Talk button is released. Battery Power icon
is held at the level it was at during receive.
NOTE
If the Talk button is held down for five (5) minutes,
the radio will automatically sound a series of beeps
and cease transmitting to prevent unwanted signal
generation and battery drain. As soon as the Talk
button is released, it can be pressed again to
resume transmission.
GMRS Standby Mode
The GMRS (General Mobile Radio Service) Standby feature is a
land-mobile service available for short-distance, two-way
communications in the USA. You must have a valid FCC license
to communicate on these channels (see page XX).
While in GMRS Standby mode, the user will be able to Transmit
(Tx) by pressing the Push to Talk (Talk) button. Signals in
Receive (Rx) mode will be received on the selected channel(s).
When in GMRS Standby mode, the radio has the ability to
receive calls as well as transmit calls
NOTE
As GMRS channels are scrolled, you will see CTCSS or DCS
icons displayed on the LCD screen if the codes have been
previously programmed. You will only hear transmissions
from other radios with the equivalent subcodes programmed.
When a transmission is received, the following icons will
be displayed.
■ Receive (Rx) Icon
■ Bar Graph Icon
Operating Your Radio
Operating Your Radio
MRHH450DUAL_MANL_ENG_MRHH330_ENG_Body 1/24/14 11:28 AM Page 54
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