User's Manual

Trimble R7/R8 GPS Receiver User Guide 105
Overview 12
Trimble R8 GPS Receiver Operation
• Two RS-232 serial ports for:
– NMEA output
–RTCM SC-104 input and output
– Trimble Format (CMR & CMR Plus) input and output
• One TNC radio antenna connector
• 6 MB internal memory for data storage
• Internal 450 MHz radio with a transmit option or GSM module
12.2Use and Care
The Trimble R8 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 Trimble R8 receiver outside the
specified temperature range can damage it. For more information, see
Chapter 17, Specifications.
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.