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D Transmitting Corrections
158 SPSx51 Modular GPS Receivers User Guide
Scenario 3: Outputting corrections from a SNB900 radio to an
HPB450 or TRIMMARK 3 radio
Output corrections from the Trimble SNB900 radio through the Lemo port to an
HPB450 or TRIMMARK 3 radio. This is especially useful when using a Smart GPS
antenna such as the Trimble SPS881 and the construction site requires dual
frequencies (450 MHz and 900 MHz) to be broadcast.
Solution
To configure the system:
1. Use a cable to connect the SNB900 radio-modem (Lemo Port) to the SPS881
Smart GPS antenna.
2. Use the SCS900 software to output the corrections to the external SNB900
radio-modem.
3. Connect the HPB450 or TRIMMARK 3 radio to the Modem port of the SNB900
radio-modem.
4. From the front panel of the SNB900 radio-modem, set output to both Radio and
Lemo.