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A-20 Acutime 2000 Synchronization Kit User Guide
Trimble Standard Interface Protocol
A
A.15 Packet Descriptions
Command packets are sent from an external device, such as a
computer or terminal, to the receiver when requesting report packets,
setting receiver parameters, or performing receiver command
operations such as resetting the receiver. Many command packets
have a corresponding report packet, which is sent to the external
device in response to the command packet. Some commands perform
discrete operations and have no matching report packet.
0x1D Command Packet 1D
Oscillator Offset
This packet commands the GPS receiver to set or clear the oscillator
offset in battery backed memory. This is normally used for servicing
the unit.
To set the oscillator offset, four data bytes are sent: the oscillator
offset in Hertz relative to L1 as a SINGLE real value. The oscillator
offset is automatically updated when the receiver is doing fixes.
!
Note – Use of this packet is for diagnostic purposes only and is not
recommended for the user.
Table A-16 Command Packet 1D - Clear Oscillator Offset
Byte Item Type Value Response
0 Operation Byte "C," 43 hex Clear the oscillator offset
Table A-17 Command Packet 1D - Set Oscillator Offset
Byte Item Type Value Response
0-3 Offset Single Offset in
Hertz
Set the oscillator offset