User's Manual

Trimble R7/R8 GPS Receiver User Guide 9
Overview 2
Trimble R7 GPS Receiver Operation
• 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
2.2 Use and Care
The Trimble R7 receiver 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 76.
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.