NTS-4000-R
www.
galsys
.co.uk
galleonsupport
.com
TEL:
+44 (0) 121 608 4433
FAX:
+44 (0) 121 608 4477
WWVB ANTENNA
The WWVB antenna receives a radio signal broadcast at 60 kHz from two transmitters near Fort
Collins in Colorado. One benefit of using the WWVB signal is that as they have two transmitters
that have different scheduled down times, the WWVB signal is not affected by maintenance.
Functional up to 1000m (3,000 ft.) away from the time server, additional cable length can be
added to the supplied 10m, to increase cable size to the desired length. An extra power supply is
recommended past the length of 550m to ensure the unit is running at optimum efficiency.
One thing to bear in mind with a radio-based antenna is that certain electrical equipment
generates noise on the same frequency as the radio signal and can cause interference. Some
things to avoid are older computer monitors, switch mode power supplies and air conditioning
units.
Radio based antennas are also directional antennas. The front of the antenna (this is the opposite
side to where the cable enters the box) should be facing the transmitter for the best signal
reception.
For more information on the WWVB signal please refer to the National Institute of Standards and
Technology (NIST) under the Time and Frequency Division at
www.
nist
.gov/pml/div688/grp40/wwvb.cfm