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FM30/FM100/FM250 User's Manual
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1.2.1 Stand-Alone
In the standard configuration, the FM30, FM100, and FM250 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 equip-
ment in a traditional setup (exciter, audio processor, RF amplifier).
1.2.2 Backup
In the standard configuration, Crown transmitters are also used in backup applica-
tions. 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 FM30, FM100, and FM250 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.
1.2.4 Exciter
In addition to the standard configuration, the FM30, FM100, and FM250 are
available in optional configurations to meet a variety of needs.
An "E" suffix, as in the FM30E, for example, represents an exciter-only configura-
tion. 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.
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