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Page 2
Powering options
Power for operation in
aerial-amplifier mode
can be supplied by a
PRO
ception
proPSU11F or proPSU12F 12 V power unit connected in any of the output lines (
Fig. 1
).
The amplifier can also be powered at 5 V from certain DVB-T (Freeview
) receivers which
have an option to provide power on their antenna sockets. A separate power unit will not
be required if this type of receiver is in use on any of the outputs, provided that it can be
left connected continuously to the mains supply.
In
return-path mode
9 V power is provided to the input of the proMHD14R by the Sky*
receiver (
Fig. 2
). The latter must be configured in its INSTALLER SET-UP menu to provide
power on RF OUT-2. On the Sky handset press SERVICES, 4, 0, 1, SELECT, then select the
SECOND OUTLET POWER SUPPLY option. Set this to be ON (the default state is OFF),
SAVE SETTINGS and BACK UP out of the menus. Sky* receivers can supply sufficient
current to power the proMHD14R together with up to four proSAT1EYE infrared receivers.
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 over-
stressed. Connectors should be tightened with a spanner, not left finger-tight.
System earth bonding
Earth bonding terminals are provided on the amplifier casting for use where necessary.
Distribution systems supplying signals to more than one household should comply with
the safety requirements of BS EN 50083-1. This effectively requires the system to be earth
bonded. (The use of isolated outlet plates is no longer recommended since they compromise
screening integrity and allow ingress of interference.)
Fixing
Methods for mounting the amplifier are illustrated in Figures 3 to 5. The cable tie fixing
is intended to support the weight of the amplifier only. Cables should be taped to the
mast at intervals of approximately 400 mm to ensure that their weight is adequately
supported. When used in return-path mode the amplifier will usually be mounted on an
outside wall. A high fixing position is recommended to reduce the risk of tampering or
vandalism.
Being fully screened, the amplifier will not be affected by proximity to an antenna. However
clearance of not less than 300 mm from the nearest part of the antenna should be
observed to avoid degrading the antennas performance. Manufacturers instructions
regarding routing of the cable from the antenna terminal box must be followed if provided.
Fig.1
proMHD14R aerial amplifier installation
showing two (optional) methods for splitting outputs.
Fig.2
proMHD14R return path application with Sky* box.
Note: dish and SCART connections omitted for clarity.
Fig.3
cable tie fixing
Fig.4
fixing to flat surface
Fig.5
Fixing the amplifier
module directly (indoor
application only, discard
mouldings).
Earth terminal
(see text).
proMHD14R
VCR
(optional)
Sky* Digibox
or Sky+ box
Outlets
proOUT11C
PRO
ception
IN
ANT IN
RF OUT-2
RF OUT-1
RF OUT
ANT IN
proSAT1EYE
Power unit
proPSU12F
proMHD14R
proSPL204
splitter
IN
Outlets proOUT11C
PRO
ception
PRO
ception
IN
