C.16 Option 28: Power System Time, Frequency and Phase Monitor 163
34±sss.sss
C
Time Deviation*
66hhmmss
C
System Time
77nn.nnn
C
System Frequency
88nnn.nn
C
System Phase
89nnn.nn
C
System Magnitude
55ddd
C
Day of Year
<BEL> <BEL> = hex 07
The decimal points shown above are not actually transmitted in the data stream, but their position
is implied. The displays are configured to show the decimal point in this position.
*Time Deviation is output in two formats in the same data stream: 33±s.ss and 34±sss.sss.
Output for the 33±s.ss format will be +9.bb when the measured value exceeds +9.99 (b = blank).
It will be -9.bb when the measured value is less than -9.99.
Output for the 34±sss.sss format will observe the following conventions for out-of-range values and
leading blanks. Decimal points are implicit and do not appear in the data stream.
Time Deviation Range Format (b=blank)
Below -999.99 -bbb.bbb
-999.99 to -100.00 -sss.sss
-99.99 to -10.00 -bss.sss
-9.99 to -0.01 -bbs.sss
+0.00 to +9.99 +bbs.sss
+10.00 to +99.99 +bss.sss
+100.00 to +999.99 +sss.sss
Above +999.99 +bbb.bbb
Table C.10: Option 28, B2 Broadcast Time Deviation Values
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