Trimble NT300D
1. In order to properly configure the NT300D to work with Carlson Field, it must first be powered up in Setup mode (by holding down the [Setup] button on the front panel of the receiver while powering it on) so that the advanced setup options are available. Once the NT300D is powered up in this mode, bring up the Setup menu via the [Setup] button. Page down using the More menu option until the I/O menu item is available, and select it.
a) In the I/O menu, select whichever port is to be used to
interface the receiver with the computer running Carlson Field
(Port 1 by default). Next, set both the input and the output to
transmit/receive in NMEA, at 9600 baud rate. The
final option, Remote Select, should be set to
Primary.
b) Now the NMEA sentences must be configured. From the I/O menu, enter the NMEA Sentences submenu. Disable all sentences, save for the GGA sentences and the GSA sentences. Ensure the Talker ID is GP. From here, Return to the I/O menu.
c) The NMEA Control menu item, reachable from the I/O menu, has three options. The Output Rate here should be set to 1 second, the Position Output Rate set to Output Rate, and the NMEA Output Version to 2.1.
Next, the GPS settings must be configured, and can be found in the GPS menu under the main Setup menu.
The GPS Mode should be set to 3D, and the DGPS mode set to Auto. The DGPS source should be toggled to Internal, and the Pos/Vel Filter should be Off. Mask Values should be left at Default, and the SNR at M.
Finally, the Beacon Receiver configuration (under Beacon Receiver on the Setup Menu) needs to have its Search Mode set to Auto-Dist Mode. All other values in all menus ought to either be left at their default settings, or configured as necessary to the local conditions (in the case of antenna height, etc.).
2. The RMS value reported in Carlson Field is the RMS value of the standard deviation of the range inputs to the navigation process including pseudoranges and DGPS corrections.
The NT300D is now properly configured, and if connected to a computer running Carlson Field, will transmit position fix data to the computer automatically. Before using it, however, it is best to power it down and then turn it back on normally, as running it in Setup Mode is not recommended.
Trimble 4000 Series
Hardware Setup
1. Setup the antenna and GPS receiver as normal. The radio should be on I/O Port 2.Front-Panel Configuration:
Base Station:
1. After powering on the receiver, press the [Control] Button. From the selections available, select MORE. This will bring up a second page of options. Select MORE again. The front panel screen should now be on RECEIVER CONTROL "3 of 7".Rover Station:
1. After powering on the receiver, press the [Control] Button. From the selections available, select MORE. This will bring up a second page of options. Select MORE again. The front panel screen should now be on RECEIVER CONTROL "3 of 7".Trimble 4700/4800
Hardware and Equipment:
1. Make sure that the computer's serial port is connected to the 4700/4800 in it's COM1 port (typically the port that a data collector is normally plugged into). Power should be supplied on COM2, and any radio used for RTK should be plugged into COM3.Software Configuration:
1. After selecting the Trimble 4700 equipment type from the "configure field" menu, open up "Equipment Setup." This should bring up a new window/dialog box with the following options:Configuring Rover:
Configuring Base Station:
If Read From GPS is selected, the software will read once from the GPS receiver, and then fix to that position. If Enter Lat/Lon is selected, a dialog box will open and a Latitude and Longitude must be input manually. If Enter State Plane Coord is selected, a dialog box will open allowing the input of a set of Northing/Easting coordinates by hand. Read from File will open a File>Open dialog and ask for a file name of a reference file (*.REF) to open for use in corrections.
Regardless of which option is selected, after the position is
determined, this position will be displayed, and dialog boxes will
open to enter a station id (used by the base to identify itself to
the rover(s)) and the measured base antenna height. Once these
values are entered, base setup is complete and the "Exit and Save"
button can be selected to exit the Equipment Setup menu. At this
point, whenever looking at a menu that displays the connection
status, "REFERENCE" will be displayed, instead of Float, Fixed, or
Autonomous.
Trimble 5800
Carlson Field Configuration:
In Configure Field, set the Equipment Type to Trimble
Generic.
In Equipment Setup, be sure to set the Data Type to match your
receiver setup. This Data Type is the port on the receiver that
communicates with Carlson Field. Typically, the Data Type should be
set to 2 for the serial connection and to 4 for Bluetooth.
When configuring the Base receiver, use a base station id number
in the range from 1 to 32.