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