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10 Time codes
10.4 Assignment of CF Segment in IEEE1344 Code
Bit No.
Designation
Description
49
Position Identier P5
50
Year BCD encoded 1
51
Year BCD encoded 2
low nibble of BCD encoded year
52
Year BCD encoded 4
53
Year BCD encoded 8
54
empty, always zero
55
Year BCD encoded 10
56
Year BCD encoded 20
high nibble of BCD encoded year
57
Year BCD encoded 40
58
Year BCD encoded 80
59
Position Identier P6
60
LSP - Leap Second Pending
set up to 59s before LS insertion
61
LS - Leap Second
0 = add leap second, 1 = delete leap second
1.)
62
DSP - Daylight Saving Pending
set up to 59s before daylight saving changeover
63
DST - Daylight Saving Time
set during daylight saving time
64
Timezone Oset Sign
sign of TZ oset 0 = '+', 1 = '-'
65
TZ Oset binary encoded 1
66
TZ Oset binary encoded 2
Oset from IRIG time to UTC time.
67
TZ Oset binary encoded 4
Encoded IRIG time plus TZ Oset equals UTC at all times!
68
TZ Oset binary encoded 8
69
Position Identier P7
70
TZ Oset 0.5 hour
set if additional half hour oset
71
TFOM Time gure of merit
72
TFOM Time gure of merit
time gure of merit represents approximated clock error.
2.)
73
TFOM Time gure of merit
0x00 = clock locked, 0x0F = clock failed
74
TFOM Time gure of merit
75
PARITY
parity on all preceding bits incl. IRIG-B time
1.) current rmware does not support leap deletion of leap seconds
2.) TFOM is cleared, when clock is synchronized rst after power up. see chapter Selection of generated timecode
18
Date: 12th July 2012
GPS170PCI
