Two frequency interference

What to do when Freeview reception is perfect, but several channels are missing, and they are all on the just two 'multiplexes'.

^{Brian Butterworth published on UK Free TV 30th September 2007 at 14:28}

There are several different type of interference that causes problems. This page deals with the situation where:

• Freeview reception is perfect or near-perfect most of the time
• Several channels are missing, and they are all on the just two 'multiplexes'

There are two main causes of this type of intermitted interference:

• Transmission mode problem
• Non-wideband aerial in some areas

The current Freeview mulitplexes are shown in this diagram. If all of your missing channels are on two rows, you have "two frequency interference":

Transmission mode problem

If you are unable to receive the channels on BOTH multiplex 2 and multiplex A, this will be down to the transmission mode. See Freeview modes.

This is a particular problem for people using Loft aerials and Indoor aerials .

Non-wideband aerial in some areas

In some places you will need a wideband aerial to receive all the Freeview multiplexes. To find out if you need an aerial upgrade, see My Freeview reception.