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FM30/FM100/FM250 User's Manual
I
1.1 Your Transmitter
The FM30, FM100, and FM250 are members of a family of FM stereo broadcast
transmitters. Crown transmitters are known for their integration, ease-of-use, and
reliability.
The integration is most apparent in the standard transmitter configuration which
incorporates audio processing, stereo generation, and RF amplification without
compromised signal quality. A single Crown transmitter can replace several pieces
of equipment in a traditional system.
Ease-of-use is apparent in the user-friendly front panel interface and in the instal-
lation procedure. Simply select your operating frequency (using 4 internal
switches), add an audio source, attach an antenna, and connect AC or DC power
and you're ready to broadcast. Of course, the FM series of transmitters also feature
more sophisticated inputs and monitoring connections if needed.
Reliability is a Crown tradition. The first Crown transmitters were designed for
rigors of worldwide and potentially portable use. The modular design, quality
components, engineering approach, and high production standards ensure stable
performance.
Remote control and metering of the transmitter is made possible through a built-
in I/O port. For more direct monitoring, the front panel includes a digital multi-
meter display and status indicators. Automatic control circuitry provides protec-
tion for high VSWR as well as high current, voltage, and temperature conditions.
Illustration 1–1 FM250 Stereo Broadcast Transmitter
This manual describes the FM30, FM100, and FM250 because all three transmit-
ters share common design factors. Specific product differences are noted through-
out the manual. In physical appearance, the FM30 differs from the FM100 and
FM250 in that it lacks the power amplifier and cooling fan assembly on the back
panel.
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