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Other information
Digital Terrestrial TV
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 equipment’s instructions
for how to do this.)
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.
General
Symptoms
Possible causes
What to do
Picture is the wrong size
or the source device
(computer, DVD player,
set top box and so on) will
not let you set up the pixel
resolution the display can
reproduce.
Source device has not read the set-up
data from the display.
Connecting cable does not have all the
necessary connections.
Avoid old cables and adapter devices. Use
only modern cables.
Re-start the source device after connecting
and powering up the display.
Change the graphics adapter in your
computer.
Check compatible video resolutions given in
these instructions.
Picture looks squashed or
stretched even though the
aspect ratio controls are
set correctly (for example
4:3 or 16:9).
Equipment feeding the display is set to
the wrong aspect ratio.
On the equipment feeding the TV choose the
correct output aspect ratio such as 4:3 (old
conventional) or 16:9 or 1280 x 720 or 1920
x 1080 pixels to match wide screens.
No picture.
Brightness and contrast levels are set
to minimum.
Make sure the source type is set
correctly.
Increase the brightness and contrast settings.
Select proper source input.
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