User's Manual

Remote Antenna
When the BST-75 base station transmitter
is to be rack mounted for permanent
installation, a remote antenna must be
used. The RDA-2 1/4 wave remote
dipole antenna (or equivalent) or the
COMTEK “Phase Right Antenna”
PRA-L72 high performance omni antenna
should be used. These antennas must be
placed vertically polarized up to twenty
feet away from the transmitter with the
coaxial cable supplied. The highest
possible antenna placement away from
any metallic objects is best. For high
gain directional yagi type antennas and
specialty antennas, contact COMTEK’s
Technical Support Services.
Integral Screw-in Whip Antenna
If the BST-75 base station transmitter is to be
used outside of the traditional rack-mounted
environment for stand-alone mobile type
applications, the screw-in whip antenna
(TWA-75) should be used. The transmitter
should be placed on a table or platform as
high as possible so the fully extended
whip antenna is at least 24” away from
any metallic objects. The radiated output
power of the transmitter with this whip
antenna will not be as great as the remote
antennas. The BST-75 transmitter should
only be used in the high power setting when
the telescoping whip antenna is used.
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OPERATING INSTRUCTIONS