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997-01530-01, Rev. C-25, Jan 2008 61
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F69 – Time Mode
Use function F69 to select the time type displayed by:
• The XL-GPS’s front panel display
• “
F8 – Continuous Time Once-per-Second” on page 42
•
“F9 – Time On Request” on page 44
• “F90 – Code Output Configuration” on page 72
Select between the following types of time:
• UTC (Universal Coordinated Time) differs from GPS Time by the addition of leap-second
corrections to compensate for variations in the earth’s rotation.
• GPS Time is derived directly from the GPS constellation and doesn’t contain any leap-second
adjustments or other GPS-to-UTC corrections.
• Standard Time is UTC plus a time zone adjustment. For example, Pacific Standard Time is UTC
minus 8 hours
• Local Time is UTC plus a time zone and a daylight saving time adjustment.
The factory setting is UTC. Local Time modifies UTC time to include the Time Zone and Daylight Saving
Time adjustments, if enabled by the user.
Related functions:
•
“F1 – Time Zone Offset” on page 34
• “F66 – Daylight Saving Time (DST) Mode” on page 58
Command Line
Use the following format to display the time mode currently used:
F69<CR>
F69 responds using the following format:
F69<S><TT><CR><LF>
where:
F69 = Function number 69
<S> = ASCII space character.
<TT> = Time Type. Either GPS, UTC, LOCAL, or STANDARD.
<CR> = Carriage return character.
<LF> = Line feed character.