Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site watmath.UUCP Path: utzoo!watmath!jmsellens From: jmsellens@watmath.UUCP (John M Sellens) Newsgroups: net.video Subject: A Question on Cable Converters and Converting in 2 Directions Message-ID: <8634@watmath.UUCP> Date: Mon, 13-Aug-84 13:09:26 EDT Article-I.D.: watmath.8634 Posted: Mon Aug 13 13:09:26 1984 Date-Received: Tue, 14-Aug-84 01:16:47 EDT Organization: U of Waterloo, Ontario Lines: 43 This query has its roots in pay TV, but has nothing to do with unauthorized reception etc..... Up here in Canada, pay TV is an extra service that you pay for on top of your regular cable TV charge (which I understand may not be the case in (some parts of) the US). The pay staions are on converter channels (i.e. not ordinary UHF or VHF frequencies). You must set up your magic boxes as follows: -----> converter -----> decoder ----> TV which makes it hard to use your TV's built-in cable converter (since you always have to keep it on channel 3 or 4). My question is: how hard would it be to make a small box that strips one channel out of the incoming signal for input to the decoder, then takes the output from the decoder and splices it back in to the other signals: -----> split ----all channels except the pay channel-> join ------> TV | ^ pay channel only | converted to ch 3 | | | ----------------> decoder ---------------------- Notes: decoder expects one channel coming in on channel 3. the 'join' would take a signal on channel 3 and move it back where it started (e.g. 26) the 'split' removes the scrambled 26 from all the other channels, converts it to channel 3, and sends it to the decoder. I envisage a small little box, with some (possibly inconvenient) way of setting the channel that you want to decode. Of course this whole idea falls apart when we start talking about more than one channel. Any comments?? Thanks! John M Sellens UUCP: {decvax|utzoo|ihnp4|allegra|clyde}!watmath!jmsellens CSNET: jmsellens%watmath@waterloo.csnet ARPA: jmsellens%watmath%waterloo.csnet@csnet-relay.arpa