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Acutime 2000 Synchronization Kit User Guide A-47
A Trimble Standard Interface Protocol
The error codes in Byte 1 of packet 46 are encoded into individual
bits within the byte. The bit positions and their meanings are shown in
Table A-36.
Note 1: After this error is detected, the bit remains set until the receiver is reset.
Note 2: This bit is "1" if the last computed reference frequency error indicated
that the reference oscillator is out of tolerance. (Packet 2D requests the
oscillator offset and packet 4D returns the oscillator offset to the user.)
Note 3: The Acutime 2000 does not support BB-RAM, the bit is always set.
The ACE UTC supports BB-RAM, indicating BB-RAM checksum and the bit
reports the state of the BB-RAM at system startup.
Table A-36 Report Packet 46
Error Code
Bit Position
Meaning if bit value = 1
0 (LSB) Battery back-up failed (Note 3)
1 Signal Processor error (Note 1)
2 Alignment error, channel or chip 1 (Note 1)
3 Alignment error, channel or chip 2 (Note 1)
4 Antenna feed line fault (Open or Short)
5 Excessive reference frequency error (Note 2)
6 (Unused)
7 (MSB) (Unused)