User's Manual

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Description of modem
The me-d200/d350 is a network free, point to point data
radio that offers great fl exibility in varied applications where
wireless data or voice communication is needed.
It can be used as a “dumb” radio, with no internal module
fi tted, to allow users to facilitate the use of their own
modem and protocol. Internal link changes enable the input
to be set for TTL levels so allowing POCSAG for example.
In this scenario, the radio is completely transparent and
simply needs the correct signal level inputs (see pin out
details), and use of separate control lines (PTT etc) or
serial commands.
The me-d200/d350 can also be fi tted with either a Bell
202,V.23 module, a FFSK module (up to 4800 baud rate)
or a GMSK module (up to 9600 baud rate). These allow
communication with a pc via hyper terminal and other
emulation packages. For further information on these
options, including pin outs, please refer to the separate
Module Manual available on the Mobile Expertise web site.
The me-d200/d350 also operates as a standard radio with
microphone input and speaker output, in this mode the
radio has the following associated features, these include
CTCSS/DCS, busy channel lockout and scan
Features
Compact and rugged die cast box
Resistant to dirt, dust and water ingress (IP54 rated)
Network free, point to point communication
1/5 watt programmable output power
Synthesised operation with 16 channel capability
CTCSS & DCS encode and decode
programmable 12.5 / 25kHz channel spacing
External modem / Direct FM / TTL (pocsag)
Internal (RS232) module options available:
GMSK up to 9600 or
FFSK up to 4800 or
Bell 202 V23 1200bps
RSSI level indication
Busy’ output
9 – 18 volt supply input
Enhanced Power Save Mode (sleep)
Serial commands available to control radio
Busy Channel lockout
Time out timer
Scanning
TX only feature
Programmable squelch levels
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