Raymarine RAY 210VHF - Manual (Page 24)

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SECTION 3
OPERATIONS
3.1 INTRODUCTION
Your RAY210 has the capability to transmit on 51 and receive on 93 Marine
VHF radiotelephone channels. There are channels that are FCC approved but
may only be used by authorized stations for specific purposes, depending on the
type of vessel (commercial or non-commercial). Take a look at Table 3-1 and 2
on page 22-24 which lists all of the marine VHF channels available in your
RAY210 for International and U.S. radiotelephone use. Full familiarization with
this table is essential when selecting your channels. The international
frequencies were agreed upon by the attending countries at the 1968
International Telecommunication Union Meeting in Geneva and are in active
use around the world. The U.S. channels are those channels authorized for use in
the U.S.A. by the FCC.
3.2 CONTROLS AND LCD DISPLAY
Refer to Figure 3-1 for familiarization with the controls and mode display.
3.2.1 Controls
1) On / Off and Volume Control:
This control switches the RAY210 on and off and controls the volume level of
the internal speaker. Turning the radio On will apply power to the radio
circuitry. When the radio is on, rotating this control clockwise will increase
volume to the internal speaker and rotating this control counterclockwise will
decrease volume.
2) CHANNEL Selector Control
This control selects the desired operating channel. When the control is turned in
a clockwise direction, the channel number increases. When the control is turned
in a counterclockwise direction the channel number decreases.
3) SQUELCH Control
Provides an adjustable input signal threshold to eliminate random RF
background noise during “no signal” conditions. This control sets the signal-to-
noise ratio at which a signal will become audible.
4) [16/9] Key
Used to select channel 16 or 9 immediately. This Key enables the following
operating mode;