TECHNISONIC INDUSTRIES LIMITED
TDFM-9300 Installation Instructions
TiL 13RE471 Rev. D Issue 5
21
2.22
ANTENNA SELECTION AND INSTALLATION CONSIDERATIONS
Antenna installations will vary according to the number / type of bands installed in the TDFM-
9300, types of antennas selected, and space available on the aircraft. The materials list above
contains many but not all antennas available. If dual or tri band RF modules are installed in the
TDFM-9300, it is suggested to use a single connector, multiband antenna for each of the RF
modules installed. When single band modules are installed, a single band antenna should be
used.
If the TDFM-9300 has more than one single band module installed on different frequency bands,
a single multiband antenna with separate connectors or a multiband antenna with a coupler can
be used if the frequencies in use are not multiples of each other. For example, transmitting near
150 MHz on VHF may interfere with frequencies near 450 MHz on the UHF band. Antennas
should be spaced as far as possible from each other with the Comm antennas on the opposite
side (top or bottom) from the FM antennas.
The following example uses a single RAMI AV-925 antenna and triplexer AV-926 with up to three
single band modules operating in the following Frequency ranges:
•
136-174 MHz
•
380-520 MHz
•
764-870 MHz
Summary of Contents for TDFM-9300
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