Trimble Outdoors SPSX51 - Manual (Page 158)

D Transmitting Corrections
156 SPSx51 Modular GPS Receivers User Guide
Scenario 1: Outputting corrections using an HPB450
radio-modem
A Construction base station such as the SPS851 has an internal 900 MHz radio and you
want to also transmit corrections on a Trimble HPB450 radio-modem connected to the
SPS851 receiver.
Solution
The HPB450 radio comes with a 5-pin Lemo to 7-pin Lemo connector with a power
connection lead:
1. Connect the 7-pin Lemo connector to the connector on the receiver.
2. Connect the 5-pin Lemo connector to the HPB450 radio.
3. Connect the DC power lead to an external power source.
4. Turn on the HPB450 radio.
If the HPB450 radio has the 5-pin Lemo connector to 9-pin D-sub connector cable:
1. Connect the 9-pin D connector to the 26-pin to 9-pin D-sub adaptor on the
receiver.
2. Connect the 5-pin Lemo connector to the HPB450 radio.
3. Connect the DC power lead to an external power source.
4. Turn on the HPB450 radio.
To configure the system, do one of the following:
• Use the Trimble SCS900 Site Controller software to connect to the receiver. Set
up the base station with the external radio. The SCS900 software will locate the
HPB450 radio and then allow you to set the radio channel. Then, use the front
panel of the receiver to select Radio and Lemo (R+L) to then turn on the internal
900 MHz radio transmissions. If using the 9-pin D-sub connector, select Radio
and Modem Port (R+M).
• Use the web interface to access the SPS851 setup. Select I/O Configuration / Port
Configuration. Select the Serial 1 / Lemo option and select corrections to be sent
on the Lemo port at those baud rate settings (the HPB450 serial interface is
shipped with the default rates 38400 8/N/1). While in the Port Configuration
menu, also set the internal radio to transmit corrections.
• Use the front panel of the receiver to set up the Lemo port and to select the radio
on which to output the data (shown as R+L or R+M on the receiver display).
Configuration software accompanies the HPB450 radio if you need to change the serial
connection baud rate.