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Trimble R7/R8 GPS Receiver User Guide 9
Overview 2
Trimble R7 Operation
• USB port for data transfer
• Type I CompactFlash card for data storage
• Internal charging of batteries (no external battery charger
required)
• Three RS-232 serial ports for:
–NMEA output
– RTCM SC-104 input and output
– Trimble Format (CMR) input and output
• Two TNC ports for connecting to the GPS and radio antennas
2.3 Use and Care
The Trimble R7 is designed to withstand the rough treatment that
typically occurs in the field. However, the receiver is a high-precision
electronic instrument and should be treated with reasonable care.
C WARNING – Operating or storing the receiver outside the specified
temperature range can damage it. For more information, see Physical
specifications, page 80.
High-power signals from a nearby radio or radar transmitter can
overwhelm the receiver circuits. This does not harm the instrument,
but it can prevent the receiver electronics from functioning correctly.
Avoid using the receiver within 400 meters of powerful radar,
television, or other transmitters. Low-power transmitters such as those
used in cellphones and two-way radios normally do not interfere with
receiver operations.
For more information, contact your local Trimble distributor.