Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!usc!snorkelwacker.mit.edu!bu.edu!telecom-request From: Kauto.Huopio@lut.fi (Kauto Huopio OH5LFM) Newsgroups: comp.dcom.telecom Subject: Re: Microwave / Optical Links for Audio Message-ID: Date: 7 Mar 91 17:39:25 GMT Sender: news@bu.edu.bu.edu Organization: Lappeenranta University of Technology, Finland Lines: 27 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 186, Message 11 of 14 > I need to run a stereo audio signal from our studio to a cable > company's head-end about two miles away. A four-wire non-directional > phone line is $55/mo + 760 to set up, and will certainly require some > serious EQ (loading coils are probably present). I'm wondering if Well, I think all you need is a good ol' four-wire. For two miles I think that you can send the composite stereo trhough one single pair without too much hassle. The only thing you'll propably need is two 300 ohm balancing transformers (?) and a good parametric EQ. During setup phase you'll need a good noise generator and signal analyser, but that's all! We had a scout camp radio station last summer and the transmitter was about four miles away in a telcom tower and the phone line there was about eight miles. We had Telelinks at each end (a system for sending audio over phone lines including remote transmitter control) and we put one stereo EQ to the studio end. Because our transmitter was just a mono one, we connected the two EQ channels together. Just before the transmitter we had Orban FM Optimod. The sound quality ... EARTHSHAKING! We just didn't believe our ears when we at first time put a monitor amp to the line at the transmitter site. Remember when ordering the line from the local telco that you want to have a DIRECT line to the cable company, pure copper and no coils whatsoever. Kauto Huopio (huopio@kannel.lut.fi) Mail: Kauto Huopio, Punkkerikatu 1 A 10, SF-53850 Lappeenranta,Finland