Anyone have any ideas what is happening? When tuned to DAVE channel 19 the picture momentarily blinks every minute or so, apparently at random.
ONLY ON DAVE. All other channels inc Dave+ are perfect. The box is an old-ish DTR-2100. I have tried cutting down the signal strength, which is otherwise 100% (from a home distributor amp). The lowest I can get with 20db attenuation is around 62%, at which point "signal quality" starts to drop, but all channels still work as before, including Blinking Dave.
BTW he (Dave) does not blink if connected to the TV tuner directly... HELP
I have seen the problem reported before.
Sometimes it stops blinking late evening.
Seems to me the Dave frequency is being spiked by transient noise, momentarily overloading the tuner? I shall invest in a better fly lead and re-check the socket.
Any more ideas, anyone?
DTR-T2100 originally from BT.
I replaced the HDMI, which made no difference. I replaced the coax fly lead with a better quality and remade the socket: no difference. The signal as reported by the box does not spike.
Three things of note.
1) I replaced the fly lead with a longer cheapo one, so I could avoid all other cabling (particularly the HDMI). I can get now get 100% quality at about 70% signal strength, but waggling/moving the coax nearer the other wires drops the quality on Dave, which doesn't happen on the other channels. It suggests there is some UHF interference at or around the Dave MUX frequency, which originates near the coax.
2) Our other two tv's upstairs directly on old coax work perfectly on all channels.
3) Dave has now stopped fighting me and is no longer BLINKING DAVE!
This happened overnight, spontaneously!
Time will tell, but just maybe the problem was/is at Emley Moor...
DAVE is on Mux ARQ A, as are Sky Arts, Really, E4 Extra, and others, listed here:-
Being late to the UHF debate, I find it almost magical that signals can be jumping around and so much dependent on cable quality/routing.
I have wrapped the coax and the HDMI separately in regular tinfoil, for about 300mm up to the back of the Youview box, and for an hour or so there has been no more blinking…
Maybe coincidence, but it chimes well with many other posts re HDMI to coax interference.
Two hours of watching Dave, and the picture was faultless.
Thank you for your help.
Certainly badly shielded and/or poorly grounded cables can be troublesome.
Are you using the HDMI cable that came with the YouView box, or some other HDMI cable you have? If so, how is it rated?
The HDMI is new, from eBay, supposedly good quality…
The coax and the HDMI are now well clear of each other, and the blinking is minimal after about 6pm.
To be continued…
Also Dave signal quality varies a lot if you move the flylead around.
I guess I will track it down before they find Lord Lucan!
If moving the flylead varies the quality, then either you are moving it in and out of the ambit of another cable that is radiating, or the flylead itself has issues.
Maybe check the terminations at each plug end, ensure they are properly made, with no possibility of intermittent partial shorts or partial open circuits?
fitted new flylead. Fitted new HDMI which has in-built ferrite suppressors (found it still in its wrapper: it could be the one that came with the Youview box years ago). I think it was the HDMI that solved the problem, plus routing the coax and HDMI in opposite directions.
I noticed previously that the quality of the Dave signal was variable, as measured by the box. We shall see.