All posts by Rupert
Below are all of Rupert's postings, with the most recent are at the bottom of the page.
MikeP, thanks for your replies and for clearing up my misconception about interference when adjacent transmitters use the same frequencies. I had thought this was causing poor signal quality on COM7 and COM8 after the recent retunes.
A Freeview engineer said signal quality was fine but fitted a filter in the aerial lead to remove interference from 4g mobile transmitters. Seems fine now.
I'm still puzzled as to how moving COM7 and COM8 INTO the 700 MHz band is supposed to contribute to 700 Mhz CLEARANCE. Seems counterintuitive!
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Thanks again, MikeP, but I still don't see how moving COM7 and COM8 from the 500 MHz band into the 700 MHz band is a good idea, even if they will cease to exist in four years time. Why move them at all? What was wrong with leaving them well alone? Still, I suppose it provides employment security for Freeview's engineers!
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Tuesday 6 November 2018 12:45PM
Two questions about the September/October 2018 frequency changes at Black Hill.
1. COM7 and COM8 are now on channels 55 and 56, which are slap bang in the middle of the 700 MHz range. How does this help to clear the 700 MHz range for 5g?
2. Craigkelly is also transmitting COM7 and COM8 on channels 55 and 56. Isn't this asking for trouble? I always understood that adjacent transmitters should use different frequencies to avoid interference. Otherwise why not use the same nine channels everywhere?