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Valcom, Inc.
5614 Hollins Road
Roanoke, VA 24019
USA
P. 540-563-2000
F. 540-362-9800
www.valcom.com
The master clock is not powering up. What do I do?
Check the connection between the master clock and power source. The power cable should be correctly
plugged into the power source and master clock. The power cable should also be correctly wired into the
green connector. The connector should also be fully inserted into the port on the master clock (you will
hear a clicking noise if it has been inserted correctly). The master clock does not have an on/off switch; it
will begin to function the moment it is properly connected to an active power source.
How can I determine that my master clock is showing the correct time?
The easiest way is to compare the time on the master clock to www.time.gov. If the time on your master
clock is accurate, it should be within one second of the time demonstrated by the time.gov HTML5
application for your time zone.
Please note that the accuracy of a time source is dependant on its connection with a Stratum 1 NTP server
or equivalent hardware. While many NTP servers either are Stratum 1 NTP servers or directly communicate
with Stratum 1 NTP servers (or equivalent hardware, such as GPS satellites), it is possible to acquire time
from an NTP server that is not properly synchronized to UTC. It is the responsibility of the master clock
installer or network administrator to research the reliability of an NTP server before using it as the primary
time source for the master clock.
May I use any NTP/SNTP server for downloading time data?
Any NTP or SNTP server that publicly distributes NTP data may be used.
How do I get a longer cable for my GPS antenna?
If a longer GPS cable is needed for the project, a pre-approved cable must be ordered directly from
the master clock manufacturer, or through an authorized dealer. These pre-approved cables have been
checked for system compatibility, proper functionality, and time signal quality. Using a GPS cable that has
not been pre-approved by the manufacturer will void your warranty and may not correctly relay data to the
master clock.
The part numbers for longer cables are listed below:
150 feet / 45.7 meters --- E-ANT-CBL150F-1
300 feet / 91.4 meters --- E-ANT-CBL300F-1
If your project requires a cable longer than 300ft/91.4m, please contact your authorized local dealer for
more information.
What do I do if the master clock isn’t receiving a GPS signal?
First, make sure that the connection between the antenna and master clock is securely tightened at
both ends of the cable. Next, confirm that the antenna is situated in a location where it has access to
the greatest amount of unobstructed sky. The top of a roof, away from chimneys or air conditioning
equipment is usually the best possible location. Pointing the antenna out of a window is not sufficient
enough to acquire a signal.
Support - Frequently Asked Questions and Troubleshooting
