Symmetricom XL-GPS User Manual

5: Function Reference
F2 – 12/24 Hour Format
Use function F2 to apply a 12 or 24-hour format to the time output by:
• “Keypad Interface” on page37
• “F8 – Continuous Time Once-per-Second” on page60
• “F90 – Code Output Configuration” on page105
See "F8 – Continuous Time Once-per-Second" on page 60
F2 affects how all four types of time (Local, Standard, UTC, GPS) appear when displayed or
output.
The 12-hour format counts hours from 1 to 12 twice per day, like a conventional wall clock.
The 24-hour format counts hours from 1 to 24 once per day (note: 24 is not actually
displayed, 23:59:59 changes to 00:00:00). Another example; in the 24 hour format, 18:00 is
equivalent to 6:00 PM in the 12-hour format (i.e., 18:00 – 12:00 = 6:00 PM).
Note: Local time is commonly displayed in both 12 and 24 formats. The specifications for
Standard, UTC, and GPS call for using the 24-hour format. Applying the 12-hour for-
mat to any time type leads to ambiguous time notation. For example, if the 12-hour
format is applied to UTC, the clock will display “249:10:21:34” once in the morning,
and once at night.
The factory settings for F2 are 24-hour format for the display and 24-hour format for IRIG
(F90)
Command Line
To display the current hour format, send:
F2<CR>
XL-GPS responds:
F2<S>D<HH><SEP>I<HH><CR><LF>
where:
F
= ASCII character F.
02
= Function number.
<S>
= ASCII space character (one or more).
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Symmetricom XL-GPS Specifications

General

Brand	Symmetricom
Model	XL-GPS
Category	Receiver
Language	English