Troubleshooting
If you are still experiencing reception problems after the installation of your SLxB Aerial Amplifier, please refer below.
Analogue Terrestrial TV
Snowy Picture
A faint, grainy or snowy picture is generally caused by a weak signal. Normally the TV transmitter will be a long way away. A possible improvement could be made by reducing the aerial downlead losses, installing a high gain aerial and by adding a low noise masthead amplifier or signal booster. In a small number of cases, a snowy picture can also be caused by a TV signal that is too strong.
‘Herringbone’ Pattern
‘Herringboning’ is generally caused by too strong a TV signal or by a local high power transmitter such as CB, amateur or taxi radio.Your TV sound may be affected as well as the picture. Using an attenuator will reduce the gain of an aerial signal and improve the overall picture.
Digital Terrestrial Television
Unlike analogue TV signals that can still be viewed under weak signal strength conditions, with digital terrestrial signals blocking/freezing and/or loss of digital picture and sound can be caused by insufficient digital signal and carrier to noise ratio.
Similarly blocking and even a completely blank screen with no sound can result if the input signal to the set top box is too high. The digital cliff refers to the rapid change from the picture and sound being perfect, to disappearing altogether.
When interconnecting equipment and to get the best carrier to noise, place the digital terrestrial television set top box as the first item in the signal path followed by any video or satellite receiver.
Fitting a high gain wideband roof aerial may also improve the reception and signal quality.
Digital signals are generally immune to ghosting or multipath reflections. They remain perfectly receivable under conditions where an analogue signal would suffer ghosting.
For specific help with DTT reception problems, log onto www.dtg.org.uk.
Digital Satellite Television
With digital reception, a weak signal or incorrectly aligned dish will cause the picture and sound to block or disappear. Check both the alignment of the dish and skew angle of the LNB.
Intermittent Connections
Make sure all RF cable to connector joints are tight (both inner and outer) including all flyleads and outlet plate connections.
If problems persist, please contact
Philex Customer Careline: 08457 573 479
(Local rate – UK only)
Technical Support: http://technical.philex.com
© Philex Electronic Ltd. 2004
