Format 3: Selects the third consecutive format message to be outputted.
Select “None” if only one output format is desired. “None” will be the only
choice available if Format 2 is “None.”
Signature Control: Signature Control controls when the selected ASCII data out-
put format will be present;see "Signature Control" on page161.
Output Mode: This field determines when the output data will be provided. The
available Mode selections are as follows:
Broadcast: The format messages are automatically sent out on authorized
condition (Signature control), every second a message is generated in sync
with the 1PPS.
Request (On-time): A format message is generated in sync with 1PPS after
the configured request character has been received.
Request (Immediate): A format message is generated as soon as the
request character is received. As this selection does not correlate the output
data to the on-time point for the message, in Data Formats that do not
provide sub-second information (such as Formats 0 and 1 whereas Format 2
provides sub-second information), it should be noted that the output data can
be provided immediately, but a time error could occur when using the on-time
point of the message in addition to the data for timing applications.
Note: The choices available in this field are determined by the
choices of Format Group and Format.
Time Scale: Used to select the time base for the incoming data. The entered Times-
cale is used by the system to convert the time in the incoming data stream to UTC
time for use by the System Time. The available choices are:
UTC: Coordinated Universal Time ("temps universel coordonné"), also
referred to as ZULU time
TAI: Temps Atomique International
GPS: The raw GPS time as transmitted by the GNSS satellites (as of 15-Febru-
ary-2021, this is currently 18 seconds ahead of UTC time).
If GPS or TAI time is used, then the proper timescale offsets must be set on the
MANAGEMENT/OTHER/Time Management page. (See "The Time Management
SecureSync 2400 User Manual 455
APPENDIX
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