Configuring the receiver as a base receiver or as a DGPS reference station

SPS modular receivers only.

To set up the SPS modular receiver as a base receiver or as a DGPS reference station, use AutoBase technology, the Trimble Siteworks or SCS900 Site Controller software, the receiver keypad, or an external computer.

The AutoBase feature automatically configures the receiver settings for you. The receiver obtains a position and outputs RTK corrections on the internal radio (if available) or on the LEMO port. See AutoBase Feature.

The AutoBase feature is also available for a DGPS reference station, but the DGPS RTCM output must be manually turned on. The Siteworks and SCS900 software does not support the SPS351 DGPS reference station.

The receiver is configured step-by-step to ensure that all appropriate settings are configured. To move between steps in the configuration process, press .

Configuring the receiver

  1. In the Home screen, press . Use the Operation Mode screen to configure system settings, mode settings, or to view the SV (satellite) status. Mode Settings is the default setting.
  2. Press . Use the Mode screen to select whether the receiver will operate as a base or rover. Base is the default setting.
  3. Press . Use the Base Station screen to select whether the receiver is going to use a “Here” position or if the current coordinates in the receiver will be changed.
  4. Press . When Edit Current begins to flash, the receiver is in Edit mode and you can change the current setting.
  5. Press . The setting changes to New Base (Here).
  6. Press to accept the change.
  7. Press again. The Base Name screen appears. See the next procedure.

Changing the name and description of the base station

In the Base Name screen:

  1. Press . When the first character of the base name begins to flash, the receiver is in Edit mode and you can change the current setting.
  2. Press or to change the value of the character.
  3. Press to move the cursor to the next character.
  4. Repeat Step 2 through Step 3 to enter the name of the base station. The name can be up to 16 characters. Press to accept the change.
  5. Press again. Use the Base Code screen to change the code (description) for the base station.
  6. Press . When the first character of the base code begins to flash, the receiver is in Edit mode and you can change the current setting.
  7. Press or to change the value of the character.
  8. Press to move the cursor to the next character.
  9. Repeat Step 7 through Step 8 to enter the code of the base station. The code can be up to 16 characters.
  10. Press to accept the change.
  11. Press again. The Base Latitude screen appears. See the next procedure.

Setting the reference latitude, longitude, and height of the base station

In the Base Latitude screen:

  1. The base was set up with a “Here” position, press .
  2. The Base Longitude screen is used to change the reference longitude of the base station. The base was set up with a “Here” position, so press .
  3. The Point Height screen is used to change the reference height of the base station. The base was set up with a “Here” position, press .
  4. Use the Antenna Type screen to select the type of antenna used with the receiver. Press . When the antenna name begins to flash, the receiver is in Edit mode and you can select an antenna.
  5. Press to scroll through the antenna models.
  6. Once the correct antenna name appears, press to accept the change.
  7. Press again. The Measured To screen appears. See the next procedure.

Measuring and changing the antenna height

In the Measured To screen:

  1. Press . When the antenna measurement method begins to flash, the receiver is in Edit mode and you can select an antenna measurement method.
  2. Press to scroll through the measurement methods. Once the correct measurement method appears, press to accept the change.
  3. Press .
  4. Use the Antenna Height screen to change the height of the antenna. Press . When the first character of the antenna height begins to flash, the receiver is in Edit mode and you can change the antenna height.
  5. Press or to change the value of the character.
  6. Press to move the cursor to the next character.
  7. Repeat Step 5 through Step 6 to enter the height of the antenna.
  8. Press to accept the change.
  9. Press again. The Output screen appears. See the next procedure.

Outputting corrections

In the Output screen:

  1. Press to enter Edit mode for the port.
  2. Press or to change which port will be used to output corrections.
  3. Press to accept the change.
  4. Press to move the cursor to the Format field.
  5. Press to enter Edit mode for the format.
  6. Press or to change which correction message will be output on the port.
  7. Press to accept the change.
  8. Press again.
  9. Use the NMEA screen to set up NMEA outputs from the receiver. Press to accept the default of no NMEA messages.
  10. Use the GSOF screen to set up GSOF outputs from the receiver. Press to accept the default of no GSOF messages.
  11. Use the RT17 screen to set up RT17 outputs from the receiver. This screen only appears if you have the real-time Binary Output option installed. Press to accept the default of no RT17 messages.

The Home screen appears and the base setup is complete.