All posts by Iain Davies
Below are all of Iain Davies 's postings, with the most recent are at the bottom of the page.
Here is an odd one, just installed a new aerial system on a house to replace a number of old c/d aerials feeding 4 rooms with a single w/b aerial via a 4 way amp. The location is north of Mendip so the local channel on 51 has a good signal level. All is well if each TV is fed straight from the aerial, but when you add the amp to feed each room you get "No Signal" on he local channel 51. All other channels are OK.
| link to this comment |
MikeP, Thanks for that but it seems very strange that the high power channels work OK it's the low power local channel on 51 that gives the problem. Looking at the list of channels from Mendip the local channel looks as if it uses a different transmittion system to the others, I wonder if this is used so those outside the "local" area can't use amps to get it. Somehow the amp blocks the signal, perhaps for copywrite for local advertising? No good if you are trying to use a distribution amp!
| link to this comment |
Jb38, thanks for that yes it shows there is full signal strength but no signal quality. As I said all other channels are ok, it just affects CH51.
| link to this comment |
The saga continues, having failed to get CH51 through the distribution amp I thought I could feed the signal to a least one other room via the loop through using a Blu-ray recorder to be used with the main TV but even this blocked the signal for CH51. Again all other channels HD & SD no problem, I still think they don't want this channel distrubuted.
| link to this comment |
Jb38, any TV feed directly from the aerial is OK all channels show 100% quality and 100% strength on the Blu-ray signal meter. Only when you add the distribution amp or try to loop through the Blu-ray recorder you lose channel 51. All the TVs and Blu-ray reconder are Panasonic (no rubbish)! I have also tried a Humax HD fox T2 with the same results.
| link to this comment |
Jb38, thanks for all your help. I have come to the conclusion I'm just going to feed each TV with it's own aerial, as I have spent 3 days now messing about with this. There is no problem using the Blu-ray recorder's RF in and via HDMI to the TVs.
| link to this comment |
Jb38, it just seems very strange that the high power MUXs are OK its the low power "local" channel that is giving the trouble. I could understand if the 100kw channels were giving an overload, not the local Channel at 10kw!
| link to this comment |
Wednesday 26 March 2014 8:01PM
As I said in a previous post COM 7 & 8 will not be available until later in the year, as the C/D TX aerials neen to be changed to be able to handle the low 3X channels.