Symmetricom ND-CLK User Manual page 40

duplication. Consult your IT/Network Administrator for a list/range of available
IP addresses to avoid IP address conflicts.
4. If using DHCP mode, consult your IT/Network Administrator to ensure that your
DHCP server is configured to automatically supply the NTP server address before
selecting the "Use NTP server(s) address provided by DHCP server" checkbox.
If the DHCP server cannot automatically supply the NTP server address(es), then
deselect this option and enter the NTP server(s) address(es) manually.
5. Verify that the clock is connected to the Ethernet LAN.
6. Verify that all network cables, hubs, etc. are in proper working order. Be sure
that Ethernet crossover "patch cables" are not being used where inappropriate.
Problem: Clock is not displaying the correct local time or date.
Problem: Clock did not properly negotiate the Daylight Savings Time to standard time
(or vice-versa) transition.
Possible reasons/solutions:
1. Time zone offset has been configured incorrectly. Provide the correct time zone
configuration.
2. Daylight savings time has been configured incorrectly. This is configured
separately from the time zone configuration. Provide the correct daylight time
configuration by either manually entering the daylight saving time rules or
selecting the single button configuration under WinDiscovery. If using the
convenient single button configuration for US/Canada or EU DST, be certain to
use the latest version of WinDiscovery and apply it for each clock. The latest
version of WinDiscovery will have the latest DST rules for the US/Canada and
EU implemented. Or you may enter the DST rules manually. If using the
"Current Windows Setting" button to apply the DST rules, verify that the rules on
the computer are correct.
3. If using DHCP/BOOTP for network configuration, consult with your network
system administrator to see if the optional Time Zone option has been changed.
This option as provided by DHCP can override manual settings.
4. If you have used the Set Time/Date function, note that the clock assumes that you
have entered UTC and will apply your Time Zone and DST configuration relative
to the manually entered time.
5. The NTP time server(s) is not available or the NTP server being used has the
incorrect UTC time. Verify the NTP time server is available and is providing the
correct UTC time.
6. Verify that the hand calibration procedure was not used to set the time on the
clock instead of configuring using the time zone and DST settings. If this is the
case, the recalibrate the clock hands using the hand calibration procedure. Then
apply the proper time zone and DST settings.
Problem: Clock hands appear to freeze periodically.
Problem: The hands are running fast (at a rate of 1 revolution every two seconds for the
minute hand).
Problem: The hands are running in reverse, or the hands are jumping to another time.
Problem: The red status LED is flashing.
ND-CLK User Manual- Rev 1.0.1 - Sep-08
37
®
Symmetricom , Inc