B
roadband Power Technology
,
3945
North 900 West, Pleasant View, UT 84414-1055 Ph: 801.732.0924 Fx: 801.732.0891
Website: http://www.bptec.com Email: [email protected]
3
The DC Power Supply -
The ARA series antennas utilize a wall plug adapter power supply. When connected to a main voltage of
120 VAC, it delivers a regulated 12 VDC with a maximum current of 1.0 amp. The antennas typically
require between 70-100 mA. This conservative power rating has been selected to provide a safe and
reliable supply that can be reliably used for the life of the installation.
The ARA series products require a minimum voltage 11 VDC and the maximum should not exceed 13
VDC. If you would like to supply ARA products with other DC power supplies do not attempt to operated
the ARA products outside of their specified voltage range. The inner ring of the connecting 5.5 X 2.5 mm
plug is the POSITIVE polarity while the outer shaft lead is NEGATIVE polarity.
The wall plug adapter is connection to the RSM-2000 INTERFACE. The INTERFACE allows the DC to be
applied to the center conductor of the coaxial cable, eliminating the need of an additional power supply
lead.
The RSM-2000 -
The RSM-2000 is basically a diplexer that allows the DC current for the preamplifier to be applied to the
center conductor of the RF coax, eliminating the need for an additional DC power feed conductor. The
RSM-2000 contains an internal fuse and a user variable attenuator to adjust the signal level of the
preamp in the event of signal overload conditions. The DC power connection is a 5.5 X 2.5 mm
receptacle.
The user replaceable fuse located under the top cover and can be accessed by removing the two Philips
screws located on the top cover. In the event that the fuse is found to be open (evidenced by having no
+12 VDC voltage at the center pin of the BNC(F) output connector), it can be replaced with a Radio
Shack P/N 279-1062, 0.75 A, slow-blow, 5X20 mm, GMA type.
The RSM-2000 also contains a high quality RF attenuator allowing received signals to be attenuated over
the entire frequency range of 50 kHz to 2000 MHz. The RF adjustment range is about 0-20 dB with
minimum insertion loss (maximum gain) in full clockwise position. The attenuator allows matching the gain
of the antenna to the receiver in use allowing reduction of gain for receivers that are sensitive to
additional gain placed at the RF input. It can also be used to reduce the effects of overdrive from local
broadcast stations.
The attenuator is adjusted via the blue adjustable screw located on the side of the Interface unit. To
reduce the gain, turn the attenuator counter clockwise, to increase the gain turn it clockwise. Additional
information can be found in the troubleshooting section.
Installation -
Where to Place the Antenna -
The UHF models, (ARA-2000, 2000-HDX) and antennas using the EWPA-5200 should be mounted as
high as possible above ground level and away from structures (towers), trees and other obstacles. A clear
view of the horizon in all directions will insure optimum reception. Installation of the ARA active antenna
outside the building structure will assure you of the best possible reception quality. Attic or closet
mounting although slightly less effective provides good performance for those not able to mount the
antennas outside.
