All posts by Clement Fisher
Below are all of Clement Fisher's postings, with the most recent are at the bottom of the page.
Hi
I live in Stoke Gabriel which I know is not a wonderful area for TV reception generally but we have had good freeview coverage. However, in the last few years, all the channels multiplexed on to 666MHz have become unusable (picture artefacts and sound breakup). I know this frequency is transmitted 3dB lower at 10kW, but the channels on 642MHz (at the same transmitter power) are still fine.
Looking at the signal strength and quality monitors on the TV, 666MHz was quite often reporting no signal or very low signal with poor quality
I have now put another pre-amp in front of the main signal amplifier/splitter box and that seems to have made the performance acceptable, albeit with the odd burst of errors.
Are you sure the TX power is 10kW on this frequency? I assume the antenna pattern is the same as 642MHz (within reason).
Cheers
Clem (retired electronics/radio engineer)
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Tuesday 30 January 2018 1:53PM
Hi
I live in Stoke Gabriel and have been having signal breakup problems for some time on all channels multiplexed onto 666MHz - on the TV tuning menu the signal power is down and quality poor. The 614MHz channels (which are transmitted using the same 10kW) have slightly lower power but perfect quality.
Putting an extra amplifier in front of the main distribution amp/splitter has made the channels on 666MHz just about acceptable, even though there are odd errors reported.
Are you really using the same power on 666MHz as 642MHz? I assume the antenna pattern is similar (it will never be identical at all frequencies)