Valcom, Inc.
5614 Hollins Road
Roanoke, VA 24019
USA
P. 540-563-2000
F. 540-362-9800
www.valcom.com
4
Valcom, Inc.
5614 Hollins Road
Roanoke, VA 24019
USA
P. 540-563-2000
F. 540-362-9800
www.valcom.com
Identify an appropriate location to install the master clock.
The location should be accessible to the installer, and should be easily able to access its time base. This
means that:
1) This master clock can receive NTP time from any NTP server over a Local Area Network (LAN) as a
standard feature. If NTP is being used as the master clock time source, then the master clock must be
installed in a place that allows it to connect to a network router/switch with CAT5 or CAT6 network cables.
2) The master clock may receive GPS time if it was ordered with an optional GPS receiver module. In this
case the master clock will include a built in GPS receiver module, a GPS cable, and a GPS dome antenna.
The GPS antenna must be installed on the facility’s roof. The master clock should be installed so that the
GPS cable can reach between master clock and the GPS antenna.
3) If the application requires this master clock to receive time data from a third-party master clock, then
this master clock should be installed close enough to the third-party clock that the user can run data wires
between both clocks. Research your communication protocol and provide an appropriate wire gauge and
length to connect both master clocks.
If the master clock is being used to operate a wireless clock system, then there are
additional requirements:
1) The master clock transmitter or Remote Antenna must be placed in a location where the signal is not
interfered with or blocked. Be aware of large structures made of stone, concrete, bricks, or sheet metal
as these materials will block a wireless signal. The installer should also be aware of other objects that may
cause interference to the transmission including, but not limited to, large tanks of salt water, old microwave
ovens, and large industrial machines.
2) The master clock transmitter or remote antenna must be within range of at least one wireless secondary
clock or wireless repeater. If all of the secondary clocks are positioned beyond the range of the master
clock’s transmitter, then the master clock must be connected to the local area network, and a network
repeater must be installed. The maximum transmission distance of the master clock transmitter in an
unobstructed, open space is 3300 feet (1000 meters). Obstructions will reduce this distance, particularly
obstructions made of the materials mentioned in the previous paragraph.
System Preparations
