1–5
Getting Acquainted
1.2.5 Translator
A receiver configuration (FM100R, for example) replaces the audio processor and
stereo generator boards with a receiver module. This added feature makes the
FM30, FM100, and FM250 ideal for translator service in terrestrial-fed networks.
These networks represent a popular and effective way to increase your broadcasting
coverage. Translators, acting as repeater emitters, are necessary links in this chain
of events.
Traditionally, network engineers have relied on multiple steps and multiple pieces
of equipment to accomplish the task. Others have integrated the translator
function (receiver and exciter) to feed an amplifier. Crown, on the other hand,
starts with an integrated transmitter and adds a solid-state Receiver Module to
form the ideal translator.
Illustration 1–3 Crown's Integrated Translator
This option enables RF in and RF out on any of Crown’s FM series of transmitters.
In addition, the module supplies a composite output to the RF exciter portion of
the transmitter. From here, the signal is brought to full power by the built-in
power amplifier for retransmission. The Receiver Module has been specifically
designed to handle SCA channel output up to 100 kHz for audio and high-speed
data.
FSK ID programming is built-in to ensure compliance with FCC regulations
regarding the on-air identification of translators. Simply specify the call sign of
the repeater station when ordering. Should you need to change the location of the
translator, replacement FSK chips are available. The Receiver Module option
should be ordered at the time of initial transmitter purchase. However, an option
kit is available for field converting existing Crown units.
In the translator configuration there are differences in the function of the front
panel, see Section 3 for a description.
®
RF Out
Low-pass
Filter
RF Exciter
Metering
Frequency
Selection
RF In
Receiver
Module
(option)
FM250
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