Pelco System 9760 manual Setting and Adjusting System Time in a MULTI-NODE System

SETTING AND ADJUSTING SYSTEM TIME IN A MULTI-NODE SYSTEM

You can set system time in a multi-node system using the PC keyboard that is connected to the AT-compatible keyboard port of the CM9700-NW1. The CM9700-NW1 then provides system timing to the network. Using the CM9700-NW1 PC keyboard, you can also adjust system time if the system clock is running fast (system lead time) or slow (system lag time). For detailed instructions to set and adjust system time, refer to the sections that follow.

NOTE: System time can also be set using the CM9760-KBD rather than the CM9700-NW1 PC keyboard; however, to adjust system time, the CM9700-NW1 PC keyboard must be used.

Setting System Time in a Multi-Node System

Before setting system time, note the following:

•Begin the process of setting system time close to the top of the hour.

•When setting system time, you must synchronize the system clock to a reference time clock (RTC).

•If the CM9700-NW1 goes offline, each node reverts to its own internal system time.

To set system time using the CM9700-NW1 PC keyboard, do the following:

1.Press Ctrl+Q to exit the CM9700-NW1 diagnostic screen. The screen provides a display similar to the following:

Program end. Vectors reset.

11:36:49.12 Mon 06-22-2005 C:\NETWORK>_

2.At the prompt, enter time and then press Enter.

The currently set time is displayed and the following prompt appears: Enter new time:

3.Do the following:

a.Enter a time equaling the top of the hour in the xx:xx:xx.xx format followed by the letter a for AM or p for PM (for example, 2:00:00.00p for 2:00 PM). Do not press Enter.

b.Wait for the RTC to approach the top of the hour.

c.When the RTC equals the top of the hour, press Enter.

4.At the C:\NETWORK> prompt, invoke the system executable by entering net and then press Enter. The system time entered in step 3 is displayed on all monitors in the system.

After the system has run 24 hours or a multiple of 24 hours, you can adjust system time if the system clock is running fast or slow when compared to the RTC. To adjust system time, refer to the Adjusting System Time in a Multi-Node System section.

62 C1572M (9/05)