Model: MC-1-DE
Doc Ref. No:-m05dom102
Issue No:-00
Page 51 of 76
User’s Manual
61
Leap Second (LS)*
0 = add leap sec, 1 = Delete leap Sec
62
Daylight Saving Pending (DSP)*
Becomes 1 up to 59 Sec before DST change
63
Daylight Saving Time (DST)*
Becomes 1 during DST
64
Time-zone Offset Sign
Time-zone Offset Sign :- 0=+, 1=-
65
Time-zone Offset BCD encoded,
BCD 1
Offset from coded IRIG-B time to UTC time.
IRIG coded time plus time offset (Including sign)
Equals UTC time.
66
Time-zone Offset BCD encoded,
BCD 2
67
Time-zone Offset BCD encoded,
BCD 4
68
Time-zone Offset BCD encoded,
BCD 8
69
P7
Position Identifier #7
70
Time Zone Offset 0.5 Hour
0 = none, 1=additional 0.5 hour time-zone offset
71
Time Quality
4-bit code representing approx clock time error.
0000 = MC-1-DE Locked, maximum accuracy
1111 = MC-1-DE failed, data unreliable
72
Time Quality
73
Time Quality
74
Time Quality
75
Parity
Parity on All preceding data bits including time of
year
76
Not Used
Unassigned, Zero Value
77
Not Used
Unassigned, Zero Value
78
Not Used
Unassigned, Zero Value
79
P8
Position Identifier #8
To use these extra bits of information, protective Relays, RTU’s and other equipment receiving the
time code must be able to decode them.
In IEEE 1344 C37.118-2005 Leap Second, Leap Second Pend-
ing, Day Light Saving Time, Day Light Saving Time Pending bits
are not supported in this firmware version.
9.2.2.5 Generated IRIG-B Time Codes:
GPS TIME SYNC UNIT MC-1-DE model supports different IRIG-B 00x/IRIG-B12x protocols. Sup-
ported protocols are listed below.
•
IRIG-B007
: 100 pps, DCLS Signal, No carrier Frequency
BCDTOY, BCDYR, SBS (Time of Day)
•
IRIG-B127
: 100 pps, AM Signal, 1 KHz carrier Frequency
BCDTOY, BCDYR, SBS (Time of Day)
•
IEEE 1344 (C37.118-2005) : 100 pps, AM Signal, with 1 KHz Carrier frequency
BCDTOY, BCDYR, SBS, IEEE1344 assignment of CF bits
(Refer Section 9.2.2.4)
: 100 pps, DCLS Signal, No Carrier Frequency
