3 Setting up the Receiver
24 Trimble R6/R7 GPS and Trimble R8 GNSS Receivers User Guide
Trimble R7 GPS Receiver Operation
For more information, refer to the Trimble Survey Controller User Guide or the
appropriate Help.
7. Set up any other equipment as required, depending on whether you are using
the radio as a reference or a rover radio.
30.1 Cellular modems
You can use a cellular modem instead of a radio as your data communications link.
Cellular modems and other radio links can be used to extend the limits of your surveys.
To connect a cellular modem to a Trimble R7 GPS receiver, you need the following:
• A Trimble R7 GPS receiver
• A custom-designed cellular modem, or a cellphone that can transmit and
receive data
• Serial (cellphone to DB9) cable (supplied with the cellular modem or phone)
• Trimble DB9 to 0-shell Lemo cable
Note – This cable is suitable only if flow control can be disabled on the cellular modem. If
the cellular modem does not support this functionality, a special cable is required. For
more information, refer to the document Using Cellular and CDPD Modems for RTK,
which is available from your local Trimble Distributor.
Figure 3.13 shows the components required to connect a cellphone to a Trimble R7
GPS receiver.
Figure 3.13 Connecting a cellphone
For more information on using a cellular modem as a data link, refer to the Trimble
Survey Controller User Guide.
Serial cable
DB9 to Lemo cable
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