I checked my Fetch TV Smartbox 7000 set top box using the 999 shortcut to Help, Diagnostics, TV Signal.
I checked each of the first 12 channels for each of the Mux groups. Every single one of the Waltham region's MUX groups is at the normal signal strength that I maintain between 80% and 88%.
Dave is on Freeview 19 on the C33 MUX group. The Signal Strength is 73% and Picture Quality is 85%.
If you are not getting any of the MUX groups, I'd question if a retune is necessary or a manual scan after clearing all channels first.
If your set top box allows a manual scan, then search for C23, then C26, then C33, then C42, then C45 and finish with C49. Otherwise, test with an automatic rescan.
Remove the aerial input into the Freeview box, run autoscan to get zero channels. Reconnect the aerial input and run autoscan again and get all possible channels. I've recently got 97 channels through the wideband all-frequencies aerial. Whether a lower frequencies special aerial is required, I don't know. Maybe giving us your postcode would help to check that aerial option.
I use a signal booster. In my case, the Sky + box is where I plug in the Freeview aerial connection and it helps to boost the signal a little extra. Even so, I still get stable pictures even when I tested fitting a variable attenuator from the
http://www.satcure.co.uk/ website.
The signal strength dropped by upto 20%, yet every Freeview TV channel still displayed the same. So I removed the attenuator I had tested.
The signal booster gets the input from the Sky output and I send one of the booster's outputs to the Fetch TV box, another to the DVD Recorder then to the TV.
In Winter, you may need a booster. Please check your Diagnostics Statististics for each of the first 12 Freeview channels that will use each of the MUX groups.
Dave on C33... any signal at all? After a retune or manual scan for C33, what now? Any improvement?
If you check the TV retune website for retune instructions, you may get a better result, or check the productmanuals available:
http://www.tvretune.co.uk/productmanualsMaybe you have to set the TV channel to BBC News 24 on channel number 80 before a rescan? Maybe you need a software upgrade first?
Please tell us your Freeview box's maker and model number or whatever eg a Freeview recorder of TV with Freeview built-in.
Sometimes, getting an extra Freeview box is a good backup solution. At least it helps check Diagnostics for Signal Strength info.
Also, register free here:
http://www.tvcatchup.com for Dave is listed as a free to watch TV channel and there are a few non Freeview channels as well as a forum for extra options...