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All posts by Chris

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


Hmm, my channel scan has resulted in all my SDN channels having QPSK modulation?! I've got no idea how QPSK differs from 64QAM, but I still seem to get a picture.

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GB
C
Full technical details of Freeview
Tuesday 22 April 2014 9:57PM
Epsom

All Freeview HD channels are suddenly giving me "No Signal" - although I'm sure I was receiving BBC One HD this lunch time (22nd April).

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GB
C
Full technical details of Freeview
Tuesday 22 April 2014 10:47PM
Epsom

I can now report receiving some brief and garbled flashes of a few HD channels, and so the problem seems to be a sudden and catastrophic drop in signal quality from the Crystal Palace transmitter.

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GB
C
Full technical details of Freeview
Tuesday 22 April 2014 11:05PM
Epsom

My scanning program is currently detecting the following muxes:

T 482000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # London
T 529833000 8MHz 3/4 NONE QAM64 8k 1/32 NONE
T 537833000 8MHz 3/4 NONE QPSK 8k 1/32 NONE
T 490000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE # London
T 514000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE # London
T2 0 41011 506000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # London

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GB
C
Full technical details of Freeview
Wednesday 23 April 2014 12:29AM
Epsom

I've started receiving the HD channels from BBCB again, but I'm still not receiving any of the HD channels from COM such as BBC 4 HD and BBC News HD.

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GB
C
Full technical details of Freeview
Monday 28 April 2014 12:37AM
Epsom

And my missing Freeview HD channels have now returned as mysteriously as they disappeared. And it wasn't my shiny new 4G aerial filter that did it, either! (If it were then I'd have had the channels back last Thursday evening rather than tonight).

So it's a happy, although unsatisfactory, ending...

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GB
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