21-5
IM DL850E-01EN
Time Difference from Greenwich Mean Time (Time Diff. GMT)
Set the time difference between the region where you are using the DL850E/DL850EV and Greenwich Mean
Time.
Selectable range: Set the time dif
ference in the range of −12 hours 00 minutes to 13 hours 00 minutes.
For example, Japan standard time is ahead of GMT by 9 hours. In this case, set Time Hour to 9 and Minute to
00.
Checking the Standard T
ime
Using one of the methods below, check the standard time of the region where you are using the DL850E/
DL850EV.
• Check the Date, Time, Language, Regional Options on your PC.
• Check the standard time at the URL
on the right. http://www.worldtimeserver.com/
• The DL850E/DL850EV does not support Daylight Savings Time. To set the Daylight Savings Time, reset
the time difference from Greenwich Mean Time.
• Date and time settings are backed up using the internal lithium battery. They are retained even if the power
is turned off.
•
The DL850E/DL850EV has leap-year information.
Time Synchronization Feature (Time Synchro; /C20 option)
You can use this feature to use an IRIG (Inter Range Instrumentation Group) signal to synchronize the time on
the DL850E/DL850EV with the GPS (Global Positioning System). This feature has three conditions: Unlock,
Lock, and Stable. When an IRIG signal is properly received, the DL850E/DL850EV enters into the Lock condition
and acquires time information.
Turning the Time Synchronization Feature On and Off (Time Synchro)
You can select whether to use an IRIG (Inter Range Instrumentation Group) signal for time synchronization.
IRIG Code Format (IRIG Format)
You can set the IRIG code format to A or B.
IRIG Code Modulation Type (Modulation)
You can set the IRIG code modulation type to AM or Pulse-width Code (PWCode).
Input Impedance (Impedance)
You can set the input impedance to 50 Ω or 5 kΩ.
The time synchronization feature has three conditions: Unlock, Lock, and Stable. When an IRIG signal is
properly received, the DL850E/DL850EV enters into the Lock condition. Time acquisition and synchronization
are possible after 1 s. A few minutes after the DL850E/DL850EV enters the Lock condition, it enters into the
Stable condition. In the Stable condition, the internal clock of the DL850E/DL850EV is synchronized to within
10 ppm of the GPS.
21 Other Features
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