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Acutime 2000 Synchronization Kit User Guide A-91
A Trimble Standard Interface Protocol
0x8E-4A
Command Packet 8E-4A
Set/Request PPS Characteristics
Using this packet, you can query and control the receiver’s PPS
characteristics. The receiver responds to a query or control command
with packet 8F-4A. The packet contains 16 bytes in the following
order:
To request 8F-4A, send a two-byte 8E-4A packet without any
parameters. To update parameters, send the entire 16-byte message.
Table A-75 Command Packet 8E-4A
Byte # Item Type Meaning
0 Sub-packet ID BYTE Always 0x4A
1 PPS Driver Switch BYTE 0 = off
1 = on (default)
2 Time Base BYTE 0: GPS
1: UTC (default)
3 PPS Polarity BYTE 0: positive (default)
1: negative
4-11 PPS Offset or Cable Delay DOUBLE seconds (default = 0.0)
12-15 Bias Uncertainty Threshold FLOAT meters (default = 300)