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A-52 Acutime 2000 Synchronization Kit User Guide
Trimble Standard Interface Protocol
A
0x4C Report Packet 4C
Operating Parameters Report
This packet provides several operating parameter values of the
receiver. The receiver sends this packet in response to packet 2C.
The data string is four SINGLE values. The dynamics code indicates
the expected vehicle dynamics and is used to assist the initial
solution. The elevation angle mask determines the lowest angle at
which the receiver tries to track a satellite. The signal level mask sets
the required signal level for a satellite to be used for position fixes.
The PDOP mask sets the maximum PDOP with which position fixes
are calculated. The PDOP switch sets the threshold for automatic 3-
D/2-D mode. If 4 or more satellites are available and the resulting
PDOP is not greater than the PDOP mask value, then 3-dimensional
fixes are calculated. This information is stored in non-volatile
memory.
Table A-43 Report Packet 4C
Byte Item Type, Units Default Value, Velocity
0 Dynamics code BYTE Land (0) value left
unchanged
(1) land, <120 knots
(2) sea, <50 knots
(3) air, <800 knots
(4) static, stationary
1-4 Elevation angle
mask
SINGLE,
radians
0.1745 (or
10°)
5-8 Signal level mask SINGLE/--- 4.0
9-12 PDOP mask SINGLE/--- 8.0
13-16 PDOP switch
(3-D or 2-D)
SINGLE/--- 6.0