TV Antenna User Manual

A-74 Acutime 2000 Synchronization Kit User Guide

Trimble Standard Interface Protocol

0x6D Report Packet 6D

All-In-View Satellite Selection Report

This packet provides a list of satellites used for position fixes by the

GPS receiver. The packet also provides the PDOP, HDOP, and VDOP

of that set and provides the current mode (automatic or manual, 3-D

or 2-D). This packet has variable length equal to 16+nsvs (minimum

4), where "nsvs" is the number of satellites used in the solution.

The GPS receiver sends this packet in response to packet 24 or

whenever a new satellite selection is attempted. The GPS receiver

attempts a new selection every 30 seconds and whenever satellite

availability and tracking status change. The data format is shown

below.

Table A-63 Report Packet 6D

Byte Item Type Units

0ModeBYTEBit

Value Meaning

0-2 0 Auto

1 Time Only (1-SV)

2 2D Clock Hold

32D

43D

5 Overdetermined Clock

6 DGPS Reference

30Auto

1 manual

4-7 - - nsvs

1-4 PDOP SINGLE PDOP

5-8 HDOP SINGLE HDOP

9-12 VDOP SINGLE VDOP

13-16 TDOP SINGLE TDOP

(16+nsvs) SV PRN BYTE