q1ssd@UUNET.UU.NET> (02/08/90)
In article <1621@speedy.mcnc.org> kgreer@mcnc.org.UUCP (Ken Greer) writes: > > So, exactly how do the non-satellite feeds get there? ssb feeders on sw, or >somehow else? If it was a ssb sw feeder, how do they keep the received (at the >relay site) audio quality high enough to re-transmit? Well VOA use a system whereby they transmit one feed on one carrier and another feed on another (although I would imagine that this practice is becoming less common as satellite feeds become cheaper). Obviously an international broadcaster is going to have equipment capable of receiving ssb signals in such a manner that they ARE good enough for re-broadcast. Perhaps a lot of audio processing is done at the receiving end ? Radio Nederland use to ship out tapes of their programs to their relay stations (although items such as news would have to be relayed from SW). They too now use satellite. + Computing Science Dept, University of Newcastle | All opinions expressed + + Newcastle upon Tyne, UK, NE1 7RU (091 265 2486) | are mine and mine alone! + + ARPA: C.Dennison@newcastle.ac.uk | Chris Dennison + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
larry@UUNET.UU.NET> (02/09/90)
oo7@ut-emx.UUCP (Q. Burpington-Smythe) writes: >...If I listen to the BBC, am I hearing signals broadcast from >the U.K., or am I only picking up something last transmitted from the Caribbean, >for example?... Some of the relay stations give a local station ID when they sign-on (and -off). At least those of the BBC and Deutsche Welle. For instance the DW Antigua relay has the following s-on announcement: "This is Deutsche Welle Caribbean Relay Station Antigua". The BBC has a publication called "London Calling". It includes their complete time/frequency schedule in a graphical format with relay information for each frequency. Unfortunately most of the international broadcasters having relay stations do not normally provide such information in their schedules. >Derek Wills Lauri -- Lauri Toropainen | (larry@.saruman.it.lut.fi) Lappeenranta University of Technology | Data Communications Laboratory (Room 356) | "The Only Thing the Power P.O. Box 20, SF-53850 Lappeenranta, Finland | Respects is Power"
henry@MEDIA-LAB.MEDIA.MIT.EDU> (02/11/90)
larry@kannel.lut.fi (Lauri Toropainen) wrote: ->The BBC has a publication called "London Calling". It includes their complete ->time/frequency schedule in a graphical format with relay information for each ->frequency. Unfortunately most of the international broadcasters having relay ->stations do not normally provide such information in their schedules. "London Calling" doesn't show the relay stations anymore; they stopped doing this a few months ago ... readers have written in to complain, and they seem unmoving in their determination to omit this information from the schedule. # Henry Mensch / <henry@garp.mit.edu> / E40-379 MIT, Cambridge, MA # <hmensch@uk.ac.nsfnet-relay> / <henry@tts.lth.se> / <mensch@munnari.oz.au>
Ken Greer <kgreer@MCNC.ORG> (02/11/90)
In article <1990Feb8.133324.22804@newcastle.ac.uk> C.Dennison@newcastle.ac.uk (C. Dennison) writes: ++In article <1621@speedy.mcnc.org> kgreer@mcnc.org.UUCP (Ken Greer) writes: ++++ ++++ So, exactly how do the non-satellite feeds get there? ssb feeders on sw, or ++++somehow else? If it was a ssb sw feeder, how do they keep the received (at the ++++relay site) audio quality high enough to re-transmit? ++ (Good info deleted here) +++ ARPA: C.Dennison@newcastle.ac.uk | Chris Dennison + Well, if I had waited about 2 more days I would not have had to post my above question ... Yesterday (Sat. 2/10/90) I happened to be listening to the R. Nederland African service from Madagascar when they discussed this very thing. Seems that more and more, satellites are the way to go. They told of the intricate encoding that is done to get the audio across the up/down link to retain the audio quality. If anyone is interested, this was on 15560 KHz at 1826 gmt (don't know exact s/on time). (s/off at 1924)