Rev. 1.0
FMX30/FMX100/FMX250 User’s Manual
I
1—4
1.2.1
Stand-Alone
In the standard configuration, the FMX30, FMX100, and FMX250 are ideal stand-
alone transmitters. When you add an audio source (monaural, L/R stereo, or
composite signal), an antenna, and AC or DC power, the transmitter becomes a
complete FM stereo broadcast station, capable of serving a community.
As stand-alone transmitters, Crown units often replace multiple pieces of
equipment in a traditional setup (exciter, audio processor, RF amplifier).
1.2.2
Backup
In the standard configuration, Crown transmitters are also used in backup
applications. Should your primary transmitter become disabled, you can continue
to broadcast while repairs take place. In addition, the FM transmitters can replace
disabled portions of your existing system including the exciter, audio processor, or
amplifier. Transfer switches on each side of the existing and backup transmitters
make the change-over possible with minimal downtime.
The DC operation option of the FMX30, FMX100, and FMX250 make them attractive
backup units for those times when AC power is lost.
1.2.3
Booster
Also in the standard configuration, Crown transmitters have been used as booster
transmitters. Booster applications typically involve certain geographic factors which
prevent your system from broadcasting to the full coverage area allowable. For
example, a mountain range might block your signal to a portion of your coverage
area. Careful placement of a Crown transmitter, operating on the same frequency as
your primary transmitter, can help you reach full coverage. An external receiver and
special antenna are required to use Crown FM transmitters as boosters.
1.2.4
Exciter
In addition to the standard configuration, Crown FM transmitters are available in
optional configurations to meet a variety of needs.
An “E” suffix, as in the FMX30E, for example, represents an exciter-only
configuration. In this configuration, the audio processor and stereo generator
boards are replaced with circuitry to bypass their function. The exciter
configurations are the least expensive way to get Crown-quality components into
your transmission system.
You might consider the Crown exciter when other portions of your system are
performing satisfactorily and you want to maximize your investment in present
equipment.
