The Table Mountain Field Site, located north of Boulder,
Colorado, is designated as an area where the magnitude of strong,
external signals is restricted (by State Law and Federal
Regulation). All radio emissions on or near the field site are
coordinated through the Regional Frequency Coordination Office in
order to minimize interference to sensitive research projects.
The site is approximately 4 km (2.5 miles) in a north-south
direction by 2.4 km (1.5 miles) east-west, and has an area of
approximately 729 hectares (1,800 acres). As an elevated,
flat-topped butte with uniform 2% slope, Table Mountain is uniquely
suited to its uses for radio experiments. It is flat with no
perimeter obstructions, and the underlying ground is relatively
homogeneous. Only temporary radio transmissions are conducted at
the site. Site power distribution is by means of buried line to
Facilities available at the Table Mountain site include:
- Spectrum Research Laboratory: This is a facility for research
into radio spectrum usage and occupancy. The Table Mountain Radio
Quiet Zone restrictions ensure that no signal incident on the mesa
overpowers any other so the entire radio spectrum is available for
study at this location.
- Open Field Radio Test Site: This facilitates studying outdoor
radiation patterns from bare antennas or antennas mounted on
various structures such as buildings and vehicles.
- Mobile Test Vehicles: There are a number of vehicles available
at the mesa varying from 4-wheel drive trucks to full featured
- Large Turntable: This is a 10.4 meter (34 foot) diameter
rotatable steel table mounted flush with the ground. Laboratory
space located directly underneath the table provides a location for
test instrumentation as well as the control equipment and motors
needed to rotate the turntable.
- Two 18.3-Meter (60 foot) Parabolic Antennas: These parabolic
dish antennas are steerable in both azimuth and elevation and have
been used at frequencies ranging from 400 MHz to 6 GHz.
Anyone wishing to make use of the Table Mountain facilities
should contact the Table
Mountain Research Project Leader.