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PD2011-9034-02
PROception
Proception Limited,
177-187 Rutland Road
SHEFFIELD
S3 9PT
United Kingdom
Web: http://www.proception.co.uk/
e-mail: support@proception.co.uk
Performance data given are typical unless otherwise stated. Proception Limited reserves the
right to change product designs and specifications without prior notice.
proAMP108U
Compact 8-way UHF amplifier
2-Year Guarantee
This guarantee covers failure of your PROception product resulting from manufacturing
defect within a period of 2 years from the date of supply to the end-user. This guarantee
does not cover damage to the product caused by abuse, tampering, defective installation or
natural causes such as lightning discharge. Repair or attempted repair, other than by the
manufacturer, will render this guarantee void. This guarantee does not affect a consumers
statutory rights.
INSTALLATION INSTRUCTIONS
This addition to the PROception range is one of the smallest 8-way UHF distribution
amplifiers available. The product is ideal for providing up to eight wired TV outlet points
from a single aerial in preparation for Digital Switchover. The product is extremely simple
to install and can be powered either locally, using an AC/DC power adaptor, or remotely,
using a PROception power unit. It can also be powered remotely from some types of
digital receiver box (Freeview box).
Features
n Flexible powering: 5 - 15 V, local or remote.
n Input filtered above and below the UHF TV band to reduce risk of interference problems
from CB, private mobile radio, TETRA, mobile phones, etc.
n Good noise figure and output capability.
n F connectors for easy connection and good system screening.
n Suitable for both digital and analogue applications, fully DTT-compatible.
Application guide
See application example diagrams on page 2.
This is a UHF-only amplifier and cannot be used to distribute VHF radio signals (FM or
DAB). PROception offers a range of multi-input amplifiers for such applications please
see our Web site or literature for details.
Aerial signal distribution
Fig. 1 shows the most common application, where the signal from the TV aerial is distributed
directly to up to eight outlet points. For satisfactory reception the aerial should provide
good signals to the input of the amplifier. This product operates as an active splitter and
distributes the signal from a common aerial to a number of points without deterioration.
Its relatively low forward gain (3 dB) is sufficient to compensate for additional downlead
cable losses in most systems, whilst avoiding intermodulation and other overload problems
which easily result from the use of amplifiers with excessive gain. In most applications this
amplifier will not improve a poor aerial signal.
Enhanced signal distribution
Fig. 2 shows an alternative configuration where the aerial signal is looped through settop box equipment (e.g. VCR, PVR, satellite receiver, etc.) before connection to the input of
the amplifier. This allows the output signals from the set-top equipment to be viewed on all
TVs connected to the amplifier outputs, in addition to the off-air aerial signals. For this to
work each item of equipment concerned must contain a modulator to provide a UHF
output (note that these outputs are analogue TV signals but do not usually include NICAM
stereo audio). The modulator output channel numbers must be carefully selected to avoid
interference, and the remote TVs will need to be tuned-in to the required set-top box
outputs. The diagram shows, by way of example, a Sky* satellite receiver with two RF
outputs, one feeding the local TV and the other for the amplifier. A separate 2-way splitter
will be required if only a single output is available from the final item in the loop-through
chain.
The proAMP108U does not provide a return path for wired remote control of remote settop equipment. If this facility is required, alternative PROception products should be
considered, or a separate wireless remote control extender system can be employed.
Notes
1. Signal handling capability is given for 5 analogue TV channels plus up to 6 DTT multiplexes at £ -14 dB relative
level.
2. Limiting values 4.8 .. 18 V (powered via DC power port or any output).
Technical data
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* Sky is registered trade mark of British Sky Broadcasting Group PLC.
Freeview is a registered trade mark of DTV Services Ltd.
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Signal connections
To preserve RF screening integrity the signal connections to the amplifier should be made
using good quality coaxial cable and connectors. This is particularly important with DTT
to minimise the ingress of impulsive electrical interference. The use of cable benchmarked
under the CAI scheme is recommended.
Crimp F connectors, used in accordance with the manufacturers instructions, will give
the best results. The importance of achieving sound braid connections cannot be overstressed. Connectors should be tightened with a spanner, not left finger-tight.
Mains power supply
Any fixed wiring installed to supply power for this amplifier should comply with BS 7671
(IEE wiring regulations) and, where relevant, Part P of the building regulations.
System equipotential bonding
A bonding terminal is provided on the amplifier for use where necessary (see Fig. 3).
Distribution systems supplying signals to more than one household should comply with
the safety requirements of BS EN 60728-11. This effectively requires earthed equipotential
bonding of the system. (The use of isolated outlet plates is no longer recommended since
they compromise screening integrity and allow ingress of interference.)
Fig.1 proAMP108U basic aerial amplifier installation.
Fig.2 proAMP108U application with distribution of set-top box outputs and showing
(optional) use of 2-way power unit.
Note: dish and SCART connections omitted for clarity.
Earth terminal
proAMP108U
VCR
(optional)
set-top box
Outlets
proOUT11C
IN
ANT IN
RF OUT-2
(see text)
RF OUT-1
RF OUT
ANT IN
*Power unit
proPSU11F
proAMP108U
IN
Outlets
proOUT11C
IN
Powering options
Power can be supplied to the amplifier by any of the following three options:
n a PROception proPSU11F or proPSU12F 12 V power unit connected in any of the
output lines. (Use of the proPSU12F 2-way power unit enables an extra outlet point to
be installed.)
n a local AC/DC power adaptor capable of providing 5 - 15 V at 25mA (such as the
PROception proPSA123) connected to the DC power port. The adaptor need not be
regulated and needs to have a standard 2.1 mm DC connector with the correct polarity
(centre pin +ve);
n one or more DVB-T (Freeview
) receiver(s) of a type which can provide 5V DC power
from the antenna socket. A separate power unit will not be required if this type of
receiver is in use on any one or more of the outputs, provided that one can be left
connected continuously to the mains supply. The power supply will need to be activated
using the receivers setup menu (refer to receiver instructions).
A green LED indicator on the amplifier confirms that power is being received.
Location and fixing
Choose a location for the amplifier which is dry and not subject to prolonged ambient
temperature conditions of less than -10 °C or more than + 40 °C. The unit should be
fixed as illustrated in Figure 3.
*5-15 V mains
power adaptor
*alternative power supply options
DC power port
PROception
PROception
*Power unit
proPSU12F
IN
*alternative power supply options
*5-15 V mains
power adaptor
Fig.3 Fixing the amplifier.
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