Trimble Outdoors AcutimeTM2000 Synchronization Kit Table A-68 Vaild GPS Configuration Settings

A Trimble Standard Interface Protocol

Table A-68		Vaild GPS Configuration Settings
Survey State	Active Configuration		Dynamics Code	Operating Dimension
Survey Disabled	Mobile		any	any
Survey Active	Survey		Land/Sea/Air	2D or 3D or Auto
Survey Complete	Timing		Stationary	1SV or Over-determined

Send packet BB with subcode 0 as the only data byte, to query for the primary receiver configuration. The receiver will respond with report packet BB. The table below lists the individual fields within the BB packet. When sending this packet, enter 0xFF or –1.0 to leave any parameter unchanged.

Dynamics Code

The default is LAND mode, where the receiver assumes a moderate dynamic environment. In this case, the satellite search and re-acquisition routines are optimized for vehicle-type environments. In SEA mode, the search and re-acquisition routines assume a low acceleration environment and the receiver reverts to the user-entered altitude in 2-D auto. In AIR mode, the search and re-acquisition routines are optimized for high acceleration conditions.

Elevation Mask

This is the minimum elevation angle for satellites to be used in a solution output by the receiver. Satellites near the horizon are typically more difficult to track due to signal attenuation, and are also generally less accurate due to higher variability in the ionospheric and tropospheric corruption of the signal. When there are no obstructions, the receiver can generally track a satellite down to near the horizon. However, when this mask is set too low, the receiver may experience frequent constellation switching due to low elevation satellites being obscured.

Acutime 2000 Synchronization Kit User Guide A-79