User`s guide

Chapter 5 - I/O Commands
TIME RAIM STATUS MESSAGE (@@Hn)
Motorola Binary Format
Request Current Time RAIM Status:
@@HnrC<CR><LF>
where:
r = output rate 0 =polled once
1 .. 255 = output at indicated rate:
0x01 = once per second
0x02 = once per every 2 seconds
0xFF = once per 255 seconds
C = checksum
Message Length: 8 bytes
Response to above command:
@@Hnpysrvvvveensffff (repeat sffff for remaining
11channels)C<CR><LF>
where:
p = pulse status 0 = off
1 = on
y = 1PPS pulse sync 0 = pulse referenced to UTC,
1 = pulse referenced to GPS time
s = Time RAIM Solution 0 = solution within alarm limits;
1 = ALARM, user-specified limit
exceeded
2 = UNKNOWN, due to:
a. alarm threshold set too low
b. T-RAIM turned off
c. insufficient tracked satellites
r = Time RAIM status 0 = detection and isolation possible;
1 = detection only possible;
2 = neither possible
vvvv = 32 bit field to indicate which svids were removed
by T-RAIM
ee = time solution 1σ accuracy 0..65535 nsec
estimate
n = negative sawtooth time error –128..+127 ns
of next pulse
For each of 12 channels:
s = satellite id 1 .. 32
ffff = fractional GPS local time 0..999999999 ns
estimate of satellite
C = checksum
Message Length: 78 bytes
Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05
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