PROception proUSM Series, proUSM11M, proUSM12M, proUSM11H, proUSM12H Installation Instructions Manual
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PD
2011-9016-02
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.
proUSM
UHF Unscreened
Masthead Preamplifier Range
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 range of unscreened masthead preamplifiers with traditional saddle and clamp
connections offers a choice of products, all with an excellent combination of good input
filtering, low noise figure and high output capability. These products are not suitable for
use in areas of high radiated interference.
Range features
n Traditional saddle and clamp connection.
n Low noise figures.
n Inputs well-filtered below 470 MHz.
n High output capabilities.
n 2- and 4-way preamplifiers can be powered via any output.
Application guide
Restrictions on use
These products are unscreened and are not suitable for use in areas of high radiated
electromagnetic interference. They should not be used where radio transmitting
installations such as mobile radio and mobile telephone base stations, radar installations,
amateur radio stations, etc. are known to operate nearby.
These preamplifiers should not be used in distribution systems feeding more than one
dwelling unit.
Product selection
See application example diagrams on page 2.
It is important to select an appropriate product for each application. The use of excessive
preamplifier gain is likely to lead to receiver overload problems and deterioration in
reception. Always use the lowest gain product which will achieve adequate signal levels
at the receiver(s) in a particular location.
proUSM11M this medium gain (14 dB) preamplifier provides sufficient boost to assist
with the reception of weak signals in the great majority of domestic installations, even
with long downleads (up to around 30 metres of 100 size cable). The output from this
preamplifier may be split using a two-way passive splitter such as the PROception
proUSS12P, or by using the proPSU12F dual-output power unit, which contains a built-in
splitter.
proUSM11H high gain (25 dB). This preamplifier is useful where exceptionally long
cable runs (up to 100m of 100 size cable) are involved such as with a remotely
mounted antenna serving a house in a deep valley. This preamplifier may also be used
with passive distribution accessories (splitters and taps) to construct a small distribution
system to feed a number of points.
proUSM12M 2-way medium gain (2 x 12 dB)
proUSM12H 4-way high gain (2 x 22 dB)
proUSM14M 4-way medium gain (4 x 11 dB). These multi-output preamplifiers provide
popular solutions to the problem of installing multiple TV points in an older building. All
multi-way preamplifiers can be powered via any of their outputs, providing flexibility in
the location of the power unit. The proPSU12F dual-output power unit can also be used
with these preamplifiers to obtain a further output.
Notes
1. Signal handling capability is given for 5 analogue TV channels.
2. Through-power to the input is not provided (all products have a DC grounded input).
Technical data proUSM family
M11MSUorpM21MSUorpH11MSUorpH21MSUorpM41MSUorp
stuptuoforebmuN12124
).xamdna(lacipyterugifesioNBd)6.2(2.2Bd)8.2(2.2B
d)6.2(3.2Bd)8.2(2.2Bd)8.2(5.2
niaGBd41Bd21Bd52Bd22Bd11
¹ytilibapactuptuOVµBd59VµBd29VµBd501VµBd201VµBd98
tupnidednem
mocermumixaM
¹level
VµBd08VµBd08VµBd08VµBd08VµBd87
stuptuoneewtebnoitalosIBd61 Bd61Bd03
²tnemeriuqerrewopCDAm02taV
21Am05taV21
egnarycneuqerflangiS)sledomlla(zHM268..074
citsiretcarahcretliftupnI
³ seicneuqerfllarof)niagdn
abssapotevitaler(noitcejerBd02 [4 zHM00
epytrotcennoclangiSpmalcdnaelddaS
egnarerutarepmetgnitarepOC°04+..0
1-
Power unit
proPSU11C
or
proPSU11F
outlet
proOUT11C
OUT
IN
proUSM11M
or
proUSM11H
Page 3Page 2
Powering and power units
All preamplifiers require a 12 volt DC power supply and are compatible with the
proPSU11C, proPSU11F and proPSU12F power units. They may also be powered from
PROception multi-way preamplifiers types proAMP24, proAMP26 and proAMP28. The
multi-way versions, proUSM12M, proUSM12H and proUSM14M, may be powered via
any of their outputs.
Signal connections
All connections must be made with a good quality coaxial cable, such as cable
benchmarked under the CAI scheme. Cheap cables with poor braid coverage should be
avoided, as should cables with aluminised plastic foil screens, since it is difficult to make
reliable connections to these.
Recommended cable preparation details are shown in Fig. 6 for cables with and without a
foil screen.
Location and mounting
In general the aerial and preamplifier should be mounted in a clear high position with a
good view toward the TV transmitter. The preamplifier location should be chosen to
minimise the risk of interference; e.g. avoid having the aerial, preamplifier or cabling
close to power and telephone lines.
For best noise performance the input cable from the aerial to the preamplifier should be
kept as short as practicable, but do not install the preamplifier amongst the elements of
an aerial. With a centre-mounted aerial, the preamplifier should be mounted on the
mast at least one metre below the closest part of the aerial. With a rear-mounted aerial,
the preamplifier may be positioned behind the aerials reflector, provided this is of the
grid or mesh type.
Methods for mounting the preamplifier are illustrated in Figures 4 and 5. The cable tie
fixing is intended to support the weight of the preamplifier only. Cables should be taped
to the mast at intervals of approximately 400 mm to ensure that their weight is adequately
supported.
proUSM11H
Power unit
proPSU12F
proUSM14M
Outlets proOUT11C
proUSS12 splitter*
IN
*proUSS12P
if installed on
powered leg
Power unit
proPSU11F
OUT
IN
Outlets proOUT11C
*Tap *Tap
75 ohm
termination
*NB choose tap values to give
approximately 6 dB gain from
antenna to outlet plates, allowing
for cable losses.
Fig. 1 Basic masthead amplifier installation
Fig. 2 proUSM11H in a simple distribution system
Fig. 3 Example multi-way installation showing alternative ways of splitting outputs.
Fig. 4 cable tie fixing Fig. 5 fixing to flat surface
When connecting the cables, take care to tighten all connections, taking particular care
with the braid clamps, which should be as tight as possible, without crushing the cable.
The importance of achieving sound braid connections cannot be over-stressed. Ensure
that the sliding cover is firmly closed once connection is complete.
OUTIN
OUTIN
IN
OUTINOUT
Fig. 6 Recommended cable stripping details
For cables with
foil screen
6 mm
6 mm
6 mm
4 mm
For cables
without
foil screen
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