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Some problems will only occur when viewing DTT channels. Due to the different techniques involved in digital reception, DTT
signal
quality
can be poor even if you appear to have a
strong signal
when viewing analogue programmes.
The DTT system requires a good quality signal to provide the best picture. When viewing analogue pictures, interference such as signal
reflection from nearby buildings or mountains causes ‘ghosting’, but still provides a viewable picture. For the DTT system, interference
such as this can disrupt the flow of data causing the picture to appear to be made up of large blocks, or to freeze intermittently. If the
picture disappears completely, this could mean that signal quality is very poor. If this happens often, you may need to improve your
aerial system to provide a better signal.
Blocky interference indicates that the signal quality is poor.
You should consider improving your aerial system.
To check the quality of your signal use the Signal Quality
feature (see page 25).
Good quality signal --- indication is green.
Poor quality signal --- indication is red.
Symptom
Checks
Blocky interference.
Picture freezes intermittently.
No DTT channels listed in the TV Guide after Auto Setup.
Check that DTT transmissions are available from the transmitter
you are currently using. If not, try directing the aerial at another
local transmitter.
Check analogue transmissions. If picture quality is poor, you will
need to improve or change your aerial system to receive DTT
channels. Consult a local installer.
TV
VCR
Aerial
Output
Aerial
Input
socket
Aerial
Input
AERIAL
SPLITTER
Aerial
Output
If you have tried the previous solutions and are still unable to
receive DTT channels, you may need to provide dedicated
aerial feeds to the TV and other equipment.
This can be implemented using an aerial
splitter or separate aerials.
I have a good aerial system, but still cannot receive
DTT stations.
Aerial
Input
socket
Separate
Aerial
Separate
Aerial
DTT TROUBLESHOOTING
