83Time & date configurationThis page allows you to configure all aspects relating to time and date within theAdderView CATx IP unit.Timezone specifierOptionally enter a recognised timezone specifier related to the current positionof the AdderView CATx IP unit. When an NTP server is used, the specifier will beused to provide the correct real time.The timezone specifier takes the following form:std offset dst [offset],start[/time],end[/time]The std and offset specify the standard time zone, such as GMT and 0, orCET and -1, or EST and 5, respectively.The dst string and [offset] specify the name and offset for thecorresponding Daylight Saving Time zone; if the offset is omitted, it defaultsto one hour ahead of standard time.The remainder of the specification describes when Daylight Saving Time isin effect. The start field is when Daylight Saving Time goes into effect andthe end field is when the change is made back to standard time. The mostcommon format used for the daylight saving time is: Mm.w.dWhere: m specifies the month and must be between 1 and 12. The day dmust be between 0 (Sunday) and 6. The week w must be between 1 and5; week 1 is the first week in which day d occurs, and week 5 specifies thelast d day in the month.The time fields specify when, in the local time currently in effect, the changeto the other time occurs. If omitted, the default is 02:00:00.Typical examples are:UK: GMT0BST,M3.5.0/1,M10.5.0/2Central Europe: CET-1CEST,M3.5.0/2,M10.5.0/3US Eastern (2006): EST5EDT,M4.1.0/2,M10.5.0/2US Pacific (2006): PST8PDT,M4.1.0/2,M10.5.0/2US Eastern (from 2007): EST5EDT,M3.2.0/2,M11.1.0/2US Pacific (from 2007): PST5PDT,M3.2.0/2,M11.1.0/2For further details• For details of timezone specifier formats, please refer to:http://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html• For details of the Network Time Protocol (main RFC number: 1305; the SNTPsubset used as the basis for the AdderView CATx IP: 4330)http://www.ietf.org/rfc.htmlTime and DateUse the arrow buttons to set the correct current time.Use NTPWhen this option is selected, the AdderView CATx will synchronise its internalclocks using information from the (Network Time Protocol) server listed in theNTP Server IP address field.NTP Server IP addressOptionally enter the IP address for a known Network Time Protocol server.Set Time from NTP ServerClick to immediately use the time and date information from the listed NTP server.