Wireless RS232 Spread Spectrum Data Transceivers

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The DGR-115 / 115H wireless rs232 spread spectrum data transceivers provide reliable long range data communications. Using the superior frequency hopping spread technology, FreeWave transceivers are capable of uncompressed data rates of 115.2 KBaud over distances of 20 miles or more, meeting the data communications needs in a wide variety of applications.

The DGR-115 / 115H product family operates at 1 Watt output power, the maximum output power allowed under part 15 rules. As well as providing long range reliable data links, FreeWave transceivers set up quickly and incur no ongoing fees, unlike cellular and land line communications.

The FreeWave transceiver operates in either point to point or point to multipoint modes, selectable through any terminal program. Repeaters may be deployed in either mode to extend the range of the link, not by plugging two units in back to back as is the case with most radios, but by programming the DGR-115 to operate as a store and forward repeater. With up to two repeaters in a link and using optional external antennas, links of 60 miles and beyond are possible.

All transceivers are assigned a unique electronic serial number at the factory, providing complete control of who does and who does not have access to the data. An optional mode allows the transceiver to respond to a set of AT commands.


The DGR-115 and DGR-115H transceivers are manufactured at the FreeWave Technologies factory in Boulder, Colorado, where tight control is exercised to ensure consistent quality. Every unit shipped is tested from -40? C to +75? C, and must also pass real world data and link tests. FreeWave spread spectrum transceivers have been used on (to name but a few) tanks, aircraft, speed boats, yachts, race cars, and earth movers, and in environments ranging from offices to volcanoes to the Antarctic. 

As a final note . . . is Frequency Hopping really better than direct sequence? We could have pages and pages of technical arguments expounding upon the merits of Frequency Hopping but the solution is really much more simple. The next time someone tries to tell you that their 900 MHz direct sequence modem is better than our 900 MHz hopper ask them to do a simple experiment: establish a link with the direct sequence modems, then set up a side by side parallel link with the FreeWave modems and watch what happens.

 Technical Specifications




20 Miles

RS232 Data Throughput **

1200 Baud to 115.2 KBaud

RS232 Interface

Asynchronous, Full duplex

System Gain

140 dB

Minimum Receiver Decode Level

-110 dBm 10-4 raw BER
-108 dBm 10-6 raw BER

Operating Frequency

902 - 928 MHz

Modulation Type

Spread Spectrum, GFSK

Spreading Code

Frequency Hopping

Hop Patterns

15 (User Selectable)

Output Power

1 Watt (+30 dBm)

Error Detection

32 Bit CRC With Packet Retransmit


3 Inch Whip Provided (DGR-115 Model) Non-standard SMA Connector Allows Use Of External Directional or Omni- Directional Antennas.

Power Requirements

10.5 - 18.0 VDC (AC Wall Adapter Provided)

Power Consumption

600 mA Transmit
100 mA Receive
180 mA Average


RS232 9 Pin Female, 9 Pin Male to 9 Pin Female Straight Through Cable Provided

Unit Address

Unique, Factory Preset

Operating Modes

Point to Point
Point to Multipoint
Store and Forward Repeater

Operating Environment

-40? C to +75? C

FCC Identifier


DOC (Canada) Identifier

2329 101 340A

* Line Of Sight Distance Using Supplied Whip Antenna

** Uncompressed Throughput Measured Assuming 75% Frequency Availability