The DM-1100 "high tier" mobile transceiver is an all digital, narrowband, high-spec radio transceiver designed for tough business, industrial and government applications. It is built on a rugged aluminum chassis, and employs multi-layer, surface mount technology printed circuit assemblies. The third generation DM-1100 series radios are successors to the pioneering DM-400, the world's first all digital mobile two way radio. The DM-1100 operates simultaneously in two bands: 138-174 MHz and 450-470 MHz, making it possible to "mix and match" bands in a radio network, depending upon availability.

An internal 12 channel GPS receiver is a standard feature and integral to the radio's circuitry. Every voice or data transmission packet includes the source and destination ID, latitude, longitude, heading, speed and altitude of the radio.

The microprocessor-controlled radio employs a powerful 32 bit digital signal processor and sends and receives voice totally digitally, making the radio secure and uninterceptable. The DM-1100 series radios are completely software defined. The radio has no internal adjustments, so there is no alignment whatsoever -- nothing to vibrate out of alignment in harsh, mobile environments. The radio's revolutionary Fractional Lock synthesizer allows it to change channels from the low end of the VHF band to high end of UHF and come up to full power in under a millisecond.

The transceivers operate with the i2way Radio Network with many cells and channels, as well as with single channel systems. The radio is capable of group calls, as well as unit to unit calls, and calls to the public switched telephone network. A full RS-232 serial data interface and a USB interface are available on the radio's rear panel to permit data to be transmitted and received from computers. Real panel connectors also provide for a remote microphone, external loudspeaker, COR output to support crossband repeaters, line level audio output, external emergency switch, several programmable I/O pins and an external GPS antenna (removal of which alerts a dispatcher and warns the operator).

Each radio includes standard DV/IP encryption. Other encryption algorithms, such as AES, may be factory programmed into the radio's Sharc DSP. A tiny plug-in module, the DM-80 Analog FM Module, allows analog FM transmission and reception with CTCSS and CDCSS squelch.

The 25 watt transmitter operates with the ultra low sideband noise needed for pure digital transmission, and includes an internal forward and reverse digitally calibrated wattmeter. Actual power output may be displayed on the radio's front panel in watts. The ability to display reflected power allows simple antenna installation verification.

The rear panel USB port provides automatic Internet Protocol connection to an external customer-provided device such as a lap top computer or PDA using the Dynamic Host Configuration Protocol. An additional RS-232 port may be used for other applications.

The radio's 6.5 watt "Class D" digital audio amplifier, and programmable microphone compressor-limiter-expander, provide crystal clear digital audio under varying field conditions. Separate audio processing settings are preprogrammed for both mobile and office environments. To complement the radios high quality audio capabilities, DWC developed a special digital microphone for the mobile environment.

The radio features a detached control head with lighted and sealed pushbuttons, and a back-lit 32 character liquid crystal display. A standard 15 foot cable is used to link the control head to the transceiver. An optional shock mounted base plate is available for rough applications such as railroad locomotives. Audio is reproduced by a 10 watt detached loudspeaker. Designed and manufactured in the USA by Digital Wireless Corporation.