I have a simple question to which I can't find an answer and I was hoping you can help me!
There was a report in a Dorset newspaper... http://www.dorsetecho.co.uk/news/3754307.Not_switched_on_about_switch_off/ The basis of the story was that Trading Standards had phoned up installers and asked them for a quote and looked at the responses. One of their reasons for disappointment was: "Only two installers [out of 29] pointed the mystery shopper to the test card on Page 284 of Teletext which gives a good indication whether an aerial upgrade is needed" We've been having a little discussion about this on ukfree.tv http://www.ukfree.tv/fullstory.php?storyid=1107051163&PGSTART=1550 and I can't find any evidence for the "Page 284 of Teletext" test. Given that teletext transmission is as chalk to the cheese of COFDM, that all the non-digital relays carry the page (as they are repeaters, with no teletext insertion capability) and that digital and analogue signal strength vary from transmitter to transmitter (from about 0.05% to 0.2%) and that there is no way providing "out of group" transmitters that information... ...there must be some basis to the "Page 284 of Teletext" test, must there not? I must admit that my work on Teletext goes back to programming the BBC Micro's 4k-receiver module back in the 1980s, and I do know how the analogue transmitter network is set up, so I have a very sceptical feeling about it. Can you point me in the direction of the research that backs up the "Page 284 of Teletext" test please? Thanks in advance -- Brian Butterworth follow me on twitter: http://twitter.com/briantist web: http://www.ukfree.tv - independent digital television and switchover advice, since 2002
