Path: utzoo!attcan!telly!problem!compus!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!swrinde!ucsd!ogicse!zephyr.ens.tek.com!videovax!bill
From: bill@videovax.tv.tek.com (William K. McFadden)
Newsgroups: sci.electronics
Subject: Re: FM Broadcast Translator
Keywords: Translator
Message-ID: <6197@videovax.tv.tek.com>
Date: 1 Dec 90 00:21:58 GMT
References: <1990Nov29.180715.18701@uncecs.edu>
Reply-To: bill@videovax.tv.tek.com (William K. McFadden)
Organization: Tektronix TV Measurement Systems, Beaverton OR
Lines: 20

In article <1990Nov29.180715.18701@uncecs.edu> crisp@uncecs.edu (Russ Crisp) writes:
>Is there anyone out there who can help me understand how
>a FM broadcast translator works?  

Translators are fairly simple.  The kind used for FM broadcasting
have an RF amplifier followed by a local oscillator and mixer to
provide 10.7 MHz.  This is passed through an IF filter to improve
selectivity.  So far, nothing is different than an ordinary FM
tuner.  Next, another local oscillator and mixer are used to beat
the 10.7 MHz IF to the desired output frequency.  This is then
filtered and amplified and sent to the transmitting antenna.

At no point is the signal demodulated, so all the subcarriers will
be intact.

-- 
Bill McFadden    Tektronix, Inc.  P.O. Box 500  MS 58-639  Beaverton, OR  97077
bill@videovax.tv.tek.com,     {hplabs,uw-beaver,decvax}!tektronix!videovax!bill
Phone: (503) 627-6920       "The biggest difference between developing a missle
component and a toy is the 'cost constraint.'" -- John Anderson, Engineer, TI


Brought to you by Super Global Mega Corp .com