Installation Instructions
All cabin entertainment equipment, such as the FD900X5, should be installed on a non-
essential bus and have a dedicated circuit breaker. It is a requirement that a switch be
installed so that the pilot can de-energize the system should it become necessary.
There are two #8 mounting holes located on the ends of the housing. It is sufficient to
mount by two attach points. Mounting locations in the cabin can be anywhere that is not
blocked or enclosed by metal surfaces. A drawer, cabinet, headliner or other suitable
location is fine.
When using the headsets, it is necessary to cycle the headset to get the channel.
Sometimes if the operator leaves his/her hands touching the headset the arms and body
will act like an antenna and the selection is more difficult. For optimum operation, press
the CHANNEL SELECT button and release.
It is important to match the output impedance of the audio sources. The input of the
FD900X5 should be low level audio such as that used for the inputs to home or automotive
entertainment systems. If one source is significantly stronger than another, it will cause
significant variation in the volume levels between channels. It may also cause frequency
bleeding and crossover between the audio channels.
In order to achieve the best frequency transmission, it is recommended that the unit be
mounted in the headliner or as close to the center of the aircraft as possible. Do not install
the unit near the nose or tail of the aircraft. It is also important not to install the unit near
any strobe circuits, inverters, or any high energy lines. Do not install the unit in a metal
enclosure. Note: some cabinets have a foil liner (grounding) which may limit the range of
the transmitter.
