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From: davew@shark.UUCP (Dave Williams)
Newsgroups: net.music
Subject: Re: Live-Aid (some random thoughts)
Message-ID: <1464@shark.UUCP>
Date: Wed, 17-Jul-85 11:33:12 EDT
Article-I.D.: shark.1464
Posted: Wed Jul 17 11:33:12 1985
Date-Received: Sat, 20-Jul-85 12:03:54 EDT
References: <389@petfe.UUCP> <1222@pyuxd.UUCP>
Reply-To: davew@shark.UUCP (Dave Williams)
Organization: Tektronix, Inc., Graphic Workstations Division
Lines: 24
Summary: 

In article <1222@pyuxd.UUCP> rlr@pyuxd.UUCP (Rich Rosen) writes:
>MTV coverage and regular commercial TV coverage were different, both
>uneven, and strangely enough, about half a second apart:  if you switched
>back between MTV and channel 5 (NYC) e.g., you noticed a half-second delay
>in MTV.  Anybody know why?

MTV uses satellites for its distribution. Channel 5 in NYC probably
used terrestrial links for their feed. This means that MTV's signal
had to travel approx. 50,000 miles farther to get to NYC if only one
satellite "bounce" was used. This translates into a delay of about
.28 seconds. In many instances a remote telecast is sent back to the
main studio via sattelite and then sent out on other satellite feeds.
This can cause a delay of over a half second or more depending on the
number of "bounces".
-- 


                                    Dave Williams
                                    Tektronix, Inc.
                                    Graphic Workstations Division

    "The 6000 Family"
"The workstations that made
    Wilsonville famous."