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Valcom 12” & 16” Wireless Clock Installation Manual
(Rev 1.02)
Valcom 5614 Hollins Road Roanoke, VA 24019 Phone: (540) 563-2000
Fax: (540) 362-9800 www.valcom.com
Initial Setup
1. All wireless clock systems require at least one
master transmitter
. This may be a V-WMCA
Wireless Master Clock, a V-GPS-TX Wireless Master Clock with GPS or a V-WMCRA Wire-
less Repeater (configured as a transmitter) that is connected to an appropriate Valcom system.
2. The
master transmitter
should be installed and operational prior to the installation of any wire-
less clocks. The preferred location for the
master transmitter
is typically in a central location
that will minimize the number of obstructions (walls, etc) between the
master transmitter
and
the wireless clocks.
3. Clocks should be installed concentrically from the location of the
master transmitter
.
4. Once a clock is installed and powered (either by installing the batteries or connection to 24V (ac
or dc) or 110V 60 Hz ac) it should correct within 5 minutes. If the clock (clock “A” for discus-
sion) does not correct within 5 minutes, press the Transmit/Receive button once on the closest
clock that has corrected within the past 12 hours (clock “B” for discussion). The second hand of
clock “B” will move to “8” indicating that it is locked in the transmit mode. Next, press the
Transmit/Receive button on clock “A” twice. The second hand of clock “B” will move to “4”
indicating that it is locked in the receive mode. If clock “A” still does not correct, there is too
much distance between clocks. Valcom recommends a maximum clocks separation of 60 feet.
Clocks that have been forced into transmit or receive will automatically resume normal opera-
tion within 10 minutes.
Operational Instructions
Notes:
Refer to the diagnostics section for useful information.
Additional master transmitters or V-WMCRA Wireless Repeaters may be added as necessary and/or to
propagate correction signal between buildings.
The coverage of the master transmitter will vary based upon building construction. This is typically not
important as each wireless clock acts as a repeater.
Upon application of power, if correction signal is received, the clock will briefly enter diagnostic 2 and
the second hand’s landing position will indicate signal strength.
