The Lassen LP GPS supports TSIP, TAIP, and NMEA protocols. Port 1 may be used for TSIP I/O or TAIP I/O, or NMEA output. Port 2 is used to input RTCM SC-104 corrections. Follow the steps below to setup the Starter Kit. 1. For TSIP, TAIP, or NMEA protocols, connect one end of the 9-pin serial interface cable to Port 1 of the receiver module. Connect the other end of the cable to COM1 or COM2 on a PC. A 9-pin-to-25-pin adapter may be required for the serial interface connection to a PC, if your PC has a 25-pin communication port. 2. Connect the antenna cable to the interface unit. This connection is made by pushing the antenna cable connector onto the MCX connector on the unit (to remove the antenna cable, simply pull the antenna connector off of the MCX connector). Place the antenna so that it has a clear view of the sky. 3a. Using either the DC power cable, connect to the 3-pin power connector on the interface unit. Connect the terminated end of the power cable to the power connector on the interface unit. Connect the red lead to DC positive voltage (+9 to +32 VDC) and black power lead to DC ground. The yellow wire is not used. Switch on the DC power source.
Another option for the more daring, is instead of having to plug the GPS unit into the wall, one can find a 12 Volt power source (such as a battery), which can be simply soldered directly to the circuit. 1. The first step is to open up the GPs unit. Remove the 4 screws holding the top of the golden box on. 2. Find the three pronged power slot, and trace the three wires leading from it back to the circuit. There should be a red, a black, and a yellow wire. The red lead should connect to the circuit via a small divider. The divider should have three prongs as well, and the metal should be showing where it is soldered to the motherboard. 3. Find where the appropriate exposed metal piece for the red wire, and connect to the positive end of a 12 volt power source. I used a battery. The black should be connected to the negative end. Solder should be used to hold the leads in place. This simplifies the operation of the GPS unit in the long run, and removes the need for a generator, which is excessively heavy.