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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'.

What to do when Freeview reception is perfect, but several chan
published on UK Free TV

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: 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.

Help with Freeview, aerials?
Can I attach a Freeview digibox to a Combi TV/Video unit?1
My high gain aerial can't get all the Freeview channels I expected2
I can't get Freeview yet, when will it start in my area?3
Are there plans to extend the range of regional variations on Freeview?4
How can I Receive Freeview on two TVs using one box?5
In this section
Official aerial installers guide to the TV spectrum future1
Which free digital TV system will give me the most reliable reception?2
High pressure causing channel loss through "Inversion"3
Digital Region Overlap4
Freeview reception has changed?5
Single frequency interference6

Comments
Tuesday, 21 November 2017
R
Rob Mac
7:39 PM

Tony Ferguson:
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Q. Your problems signal strength and quality of DIGITAL tv fluctuating between 0% and 75%/100%
A. example is freezing picture and locking cause 98% time due to BAD WEATHER heavy rain, snow, digital bounces off water unlike the old analog so all we can do is wait tul bad weather storms ease.

Might have to re-boots (known as connection re-set procedure) yes we all sick off but that's digi the future!

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This help most viewers

Robert Mac
Kinlochleven

link to this
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