Sailor RT2047, Техническое руководство

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1 GENERAL INFORMATION
1.1 GENERAL DESCRIPTION
RT2047 can operate in duplex and simplex mode.
RT2047 is provided with built in duplex-filter for duplex communication with one antenna.
RT2047 includes all 55 international and U.S. VHF marine channels, and is prepared for up to 20 private
channels to be selected as simplex or duplex channels. As option up to 67 private channels can be
provided.
RT2047 has six scanning programmes, one standard programme, and 5 individually programmable
scanning programmes.
RT2047 has built in dual watch facility, which enables the operator to listen to two channels simultane-
ously (the selected channel and a preference channel - normally CH16.)
RT2047 is provided with quick selection of channel 16.
RT2047 is provided with selcall decoder. Selective calls (CALL) or all ships calls (CQ) from the coast
station will be decoded.
RT2047 receiver section is a double-conversion superheterodyne system, which makes use of a phase-
locked digital frequency synthesizer for frequency generation based on a single crystal to provide all the
standard channels and the private channels.
RT2047 transmitter section is a phase-locked phase-modulated signal generator with a solid state RF
power amplifier.
RT2047 is provided with two microcomputers, one for controlling the frequency synthesizer, reading from
and to EEPROMS, controlling the squelch and volume functions, and controlling the selcall filter. The
other µC is controlling the display drivers, the dual watch and scanning functions.
RT2047 is for 12 Volt DC supply. Voltage change-over from 24V to 12V is done by the switch-mode power
supply N418.
RT2047 employs the most modern circuit technology, housed in a corrosion resistant aluminium cabinet
with a green nylon finish.
RT2047 is provided with membrane switches for controls, easy to use, reliable and hard-wearing. Cut-
outs in the metal front serve as a safe finger-guide.
RT2047 is fitted with night illumination.
RT2047 has been prepared with a serial communication interface for DSC (Digital Selective Call)
operation together with S.P. RADIO’s VHF DSC RM2042. DSC is the globally adopted general purpose
system for selective calling in the ship-to-ship, ship-to-shore and shore-to-ship directions and can best
be compared to ordinary telephony, giving you direct access to the national telephone network in those
areas where the coast stations have the automatic services. DSC also enables you to make automatic
distress calls containing the ships position etc. complying with the international requirements stated by
IMO in the Global Maritime Distress and Safety System, known as GMDSS.
RT2047 is prepared for scrambled communication in conjunction with Scramblers CRY2001 or
CRY2002, both produced by A/S.
RT2047 DSC - PART II
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