USER GUIDE
Introduction
Philex Customer Careline 08457 573479
http://technical.philex.com
The SLx range of aerial
amplifiers from Philex is
designed to improve picture
and sound quality by amplifying
weak UHF, VHF and FM radio
(selected models only) signals
and distributing the signal
to multiple locations around
the home. The SLx4 can also
be used to distribute a VCR,
Digital Television and Sky™/
Sky+™ signal around the
home.
Designed with style,
sophistication and value in
mind, the SLx range is the
preferred choice for both the
professional aerial installer
and the home user wanting
to get the very best performance
from their AV equipment.
We have integrated the very
latest in digital-ready signal
amplification technology, the
very best in UK-designed product
styling and highest levels of
safety to produce a class-leading
product.
With full instructions and wall
mounting template, installing the
SLx4 aerial amplifier is both quick
and easy.
27820R
Troubleshooting
TECHNICAL SPECIFICATIONS
Inputs
2
Outputs
4
Frequency range
UHF 470 - 862MHz
VHF 47 - 230MHz
Max output level
90dBµV
Gain
12dB per split
Noise
3.5dB
Isolation loss
23dB
Weight
518g
Dimensions (w x d x h)
178 x 85 x 46mm
If you are still experiencing
reception problems after
installing the SLx4, please
refer to the trouble-
shooting guide below:
No picture or sound
No signal is reaching your
television due to a possible
break in the aerial signal path.
Ensure that all equipment has
been switched on (including
the SLx4 amplifier) and that all
coaxial connectors have been
fitted correctly.
Snowy picture
Your signal strength is still too
weak. Ensure that your aerial is
positioned correctly (pointing
at your local TV transmitter).
For details of your local
television transmitters, visit
www. bbc.co.uk/reception.
Ageing aerials become
corroded by the weather,
which may need to be
replaced. Also check that the
position of the aerial has not
been mis-aligned by weather,
birds, or loft activity.
‘Herringbone’ pattern
‘Herringboning’ is generally
caused by too strong signal or
possibly by local high power
transmitters such as CB, amateur
or taxi radios. Your TV sound
may be affected as well as the
picture. Use a signal attenuator
(available from your local
electrical retailer) to reduce the
gain of your aerial signal and
improve your picture. If you are
located very close to your local
television transmitter, point
your aerial at an alternative
transmitter in order to receive a
more suitable level signal.
Problems with DTT
Unlike analogue terrestrial
television, it is not possible to
view DTT channel under weak
signal strength conditions.
Therefore, typically you will
either receive DTT channels
with a clear picture and sound
or you will not receive any
channels at all.
Sometimes, an insufficient
digital signal can cause
occasional blocking, freezing or
complete loss of picture. Some
roof aerials may not be suitable
for digital terrestrial television.
Ensure that you have fitted a
suitable wideband, high gain
aerial to help improve signal
quality to a suitable level for
clear DTT reception.
Blocking, freezing or complete
loss of picture can also occur
when a digital signal is too
strong.
If your signal is too strong then
connect your DTT receiver
directly to the UHF aerial
downlead, then connect the
SLx4 amplifier to your DTT
receiver output followed by
your remaining equipment. If
the signal is still too strong, fit
a signal attenuator between
the aerial downlead and DTT
receiver to help reduce the
signal strength.
For specific help with digital
terrestrial television reception
problems, visit www.dtg.org.uk
Problems with satellite
television
If you are experiencing any
problems with your satellite
television picture, check that
all cables and connectors have
been fitted correctly. If the
problem persists it is probably
due to the dish alignment or a
temporary problem with the
channel transmissions. Please
contact your local satellite
dealer if the problem persists.
Technical Support
If you are experiencing
problems setting up your SLx4
amplifier, or have any questions
regarding this product or any
other product within the Philex
range, please call the Philex
Customer Care Line on
08457
573 479
(UK only). Calls are
charged at local rate. Mobile
call charges may vary, please
contact your network provider
for details.
Alternatively, please visit our
technical website at
http://technical.philex.com
Prepare holes 73mm apart
for wall mounting
Line Powering
The SLx4 has built-in full
line powering which can be
used to provide power to
masthead amplifiers. When
connected to a masthead
amplifier, the SLx4 will send
the required power out of
the
IN UHF
socket up to the
masthead amplifier. Please
see your masthead amplifier
operating instructions for
more details.
It is important to ensure
that there is no equipment
between the
IN UHF
socket
and the masthead amplifier
output socket in order to
provide a non-interrupted
If you are experiencing problems using the
SLx4 amplifier, please contact our customer
care line on
08457 573 479
or email
http://technical.philex.com
Customer Care Line
© Philex Electronic Ltd. 2009. V1.2
Waste electrical products should not
be disposed if with household waste.
Please recycle where facilities exist.
Check with your Local Authority for
recycling advice.
Additional Features
To reset the system following
a short circuit, simply remove
all outputs and inputs, switch
off the amplifier and remove
the power cable from its
socket for approx 30 seconds.
You should then reconnect
the amplifier outputs one by
one until you can find which
output is causing the short
circuit.
SLx4 AERIAL AMPLIFIERS
12V power supply to the
masthead amplifier. When
connected after any
equipment, the amplifier
will automatically detect
that no masthead amplifier
is present and so will not
output 12V.
Short circuit protection
For added safety the SLx4
has
built-in short circuit
protection
. Should a short
circuit be detected, the
amplifier will shut downin
order to prevent any
possible damage. Should
this occur, all outputs will be
switched off but the power
LED will remain lit.
