Rev. 1.0
FMX30/FMX100/FMX250 User’s Manual
I
1—2
The FMX30, FMX100, and FMX250 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
installation procedure. Simply select your operating frequency 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. For more direct monitoring, the front panel includes a single control
knob, a four line display and bar graph indicators. Automatic control circuitry
provides protection for high VSWR as well as high current, voltage, and
temperature conditions.
This manual describes the FMX30, FMX100, and FMX250
Because all three transmitters share common design factors. Specific product
differences are noted throughout the manual. In physical appearance, the
FMX30 differs from the FMX100 and FMX250 in that it lacks the power amplifier
and cooling fan assembly on the back panel.
Illustration 1–1 FMX250 FM Broadcast Transmitter