Raymarine Apelco 5200, Руководство пользователя

Страница: 17 / 49

SECTION 3
OPERATIONS
3.1 INTRODUCTION
I
Your VHF5200 has the capability to transmit on 53 and receive on 93 Marine VHF radiotele-
phone channels. There are channels that are FCC approved but may only be used by autho-
rized stations for specific purposes, depending on the type of vessel (commercial or non-
commercial). Refer to Table 3-l on pages 16 and 17. These tables list all of the marine VHF
channels available in your VHF5200 for International and U.S. radiotelephone use.
Full familiar-
ization 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 Fig. 3-l for familiarization with the controls and mode display.
3.2.1 Controls
V O L U M E C o n t r o l
Turns the radio On and Off and controls the Volume of the audio output to the speaker.
The Up and Down keys
are
used to move the channel numbers up or down. The channel
number can be increased or decreased by one with each key press, or will continue to
increase or decrease the number as long
as
the key is held.
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.
PLUS] Key
Used to channel 16 immediately. This channel has been preset to channel 16 at the
to shipment.
Refer to section 3.3.2 for instructions on how to change the
PLUS channel. The 16 PLUS key on the microphone has the same functions as the
PLUS key on the radio.
Key
When pressed once, puts the radio into the weather channel receiving mode. A “WX” will
be displayed on the LCD along with the weather channel number in this mode,
the transmitter is always disabled.
To select International channels, press and hold the key for two seconds. You will
hear “beep” and will appear on the display. This causes the synthesizer to
International channel frequencies. When pressed and held again for two seconds, you will
again hear a “beep” and the synthesizer programs US frequencies. indication
disappears)
Key
When pressed once, the radio enters the MONITOR mode and “MONITOR” displayed on
the LCD. this mode, the radio will scan (monitor) 16 PLUS (priority) channel, a selected
working channel, and a weather channel for the weather alert tone.
When pressed and held for two seconds, this key changes the transmitter output power
from 1 Watt will be displayed) to 25 Watts disappears) and vice-versa.
9