VP is usually used on local fill in transmitters HP is used on wide area ones. There are exceptions to this rule.
For more info than you could ever want have a look here http://tx.mb21.co.uk/ J PS Mike Brown is a friend of Neil's ;-) "Roger Millin" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Can anyone tell me about horizontal and vertical polarisation of TV > signals. When does a vertical polarisation occur, is it associated with > a particular transmitter, how do you know what to use and when etc ? > Never run into the problem before but have seen an aerial that can be > wound from horizontal to vertical so I'm interested to know. > Ta muchly. > Roger > > > >
