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All posts by Michael Perry

Below are all of Michael Perry's postings, with the most recent are at the bottom of the page.


Mazbar:

The engineers who carry out the work at the transmitters do not come into contact with members of the public as a rule so they are unlikely to postpone their work. You may need to consider you own health security in light of today's Government announcements.



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GB
BBC Four HD
Tuesday 7 April 2020 10:14PM

Steve B:

A signal strength of 100% is too much and will cause problems, that may be the cause of your problems. You need to reduce the strength to between 70 and 85% ideally. You may need to try fitting an attenuator to reduce the signal levels.



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GB
BBC Four HD
Wednesday 8 April 2020 11:13PM

Chris.SE:

In my considerable experience in the TV industry, 100% is ALWAYS too much. Get used to the idea of being wromng sometimes.

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GB
BBC Four HD
Thursday 9 April 2020 9:59PM

Chris.SE:

100% leave no leeway for variations in signal streng5th and many tuners are not able to deal with excessive signal strength. Hencw the advice to not have 100% strength. If you do have then there can be occasions when the atmospheric absorption reduces (less moisture for example) so the strength increases. If there is no leeway then that often results in loss of signals. So keeping it well below the limiting strength is far better than risking having too much. It has been so since the days of analogue transmissions and it is actually more critical with digital transmissions. Knowledge of RF transmissions and what affects them is vital,



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GB
BBC Four HD
Sunday 12 April 2020 11:06PM

Chris.SE:

Get a life. Read what I said again and you'll realise that what I said was a general comment on why 100% is not good.

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GB
BBC Four HD
Monday 13 April 2020 10:04PM

Chris.SE:

I quoted from the information provided to me by the design teams of 2 diffwerent TV manufacturers with whom I am acting as an independent consultant and have done for several years. Between them they have far more knowledge and understanding of the real world of TV reception. I cannot fault them in their knowledge and understanding.



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GB