Digital Terrestrial TV Troubleshooter
Multiplex
DVB-T (Digital Video Broadcasting - Terrestrial) is broadcast in groups of channels on one
common frequency. This arrangement is known as a Multiplex.
There are several multiplexes in the DVB-T system, each carrying a group of channels.
If the signal level on a particular multiplex frequency is poor you may lose the whole group
of channels on that multiplex.
TV Trouble shooter
-21-
Symptoms
Possible causes
What to do
Picture blocking or
freezing. Sound breaking
up.
Weak signal or wrong type of
aerial.
Try re-tuning.
Aerial may not be suitable for digital TV broadcasts.
You may be in a place which does not get a good digital TV
signal.
Get an aerial rigger to check the aerial system.
Some channels are
missing.
Not receiving one or more
digital multiplex frequencies.
Any or all of the above
faults.
Interference or other problem
caused by passing aerial signal
through other equipment.
Try connecting the aerial directly to the digital TV receiver
and then re-tuning.
If some equipment has a radio frequency modulator, switch
it off or change the frequency of it and re-tune the analogue
TV. (Please see other equipments instructions for how to
do this.)
GB
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