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Chapter 5 Command Reference
System Time
5-74 Operating and Programming Guide
Identifying Time of Next 1 PPS Reference Edge __________
This query returns timecode message 980 to 20 ms prior to 1 PPS of indicated
time. This special query provides not only accurate time but also provides the
user the opportunity to correctly correlate this time with a corresponding
1PPS edge.
Response
The query response provides the following type of information:
• date and time of next on-time edge,
• Time Figure of Merit,
• Frequency Figure of Merit,
• leap second indicator,
• alarm indication, and
• service request.
An example response is:
T2199505112055233000049
This example is in the "T2YYYYMMDDHHMMSSMFLRVcc" format, where
:PTIMe:TCODe?
RESPONSE FORMAT
Returns timecode message 980 to 20 ms prior to 1 PPS of
indicated time.
ASCII Data
T2 indicates a timecode message.
YYYYMMDD is the calendar date at the next 1 PPS on-time edge.
HHMMSS is the 24 hour time at the next 1 PPS on-time edge.
Note that this value is influenced by the ptim:tzon setting.
M is time figure of merit.
F is frequency figure of merit.
L is leapsecond indicator (- means a -1 leapsecond is pending,
0 means no leapsecond pending, + means a 1 leapsecond is
pending).
R is the request for service bit from the status system (0 = no
service requested, 1 = service requested). An alarm will be
generated when this byte transitions to 1.
V is validity byte. 1 indicates that time-related information isn't
valid, 0 indicates that it is valid.
cc is the checksum of the prior bytes (two Hex bytes).