Trimble Outdoors AcutimeTM2000 Synchronization Kit, Part Number 45005-00-ENG manual 0x32 0x34

A Trimble Standard Interface Protocol

0x32

0x34

Command Packet 32

Accurate Initial Position (Latitude, Longitude, Altitude) Command

This packet is identical in content to packet 2B. This packet provides the GPS receiver with an initial position in latitude, longitude, and altitude coordinates. However, the GPS receiver assumes the position provided in this packet to be accurate. This packet is used for satellite acquisition aiding in systems where another source of position is available and in time transfer (one-satellite mode) applications. For acquisition aiding, the position provided by the user to the GPS receiver in this packet should be accurate to a few kilometers. For high-accuracy time transfer, position should be accurate to a few meters. TRAIM flags come on if this position is not accurate enough.

Inputting accurate position sets the self-survey completion state to 100%. The uploaded position is not stored in EEPROM unless it is stored with command packet 8E-26. The input position is reported by packet 8F-AC.

Command Packet 34

Satellite Number For One-Satellite Mode Command

This packet allows the user to control the choice of the satellite to be used for the 1D Timing mode. This packet contains one byte. If the byte value is 0, the GPS receiver automatically chooses the usable satellite with the highest elevation above the horizon. This automatic selection of the highest satellite is the default action, and the GPS receiver does this unless it receives this packet. If the byte value is from 1 to 32, the packet specifies the PRN number of the satellite to be used. A subsequent value of 0 will return the receiver to automatic 1-SV mode.

Acutime 2000 Synchronization Kit User Guide A-29