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Performance data given are typical unless otherwise stated. Proception Limited reserves the right to change
product designs and specifications without prior notice.
2-Year Guarantee
This guarantee covers failure of your
PRO
ception 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.
Proception Limited,
177-187 Rutland Road
SHEFFIELD
S3 9PT
United Kingdom
Web:
http://www.proception.co.uk/
e-mail: [email protected]
proTLA41
MATV Headend Launch Amplifier
PRO
ception
INSTALLATION INSTRUCTIONS
The proTLA41 is a single-output multi-band MATV headend launch amplifier,
suitable for small-to-medium size systems of up to around 100 outlets. The
amplifiers advanced design and push-pull output stage ensure good
intermodulation performance, combined with low power consumption for cool
and economical running.
Three separate antenna inputs are provided for Band II (FM radio), Band III (DAB
or TV) and UHF TV. Each input is well-filtered prior to amplification, giving good
immunity to out-of-band interference from any nearby base stations or similar
transmitters. The gain from the UHF antenna input features a fixed upward
equalisation slope of around 4 dB to offset the inevitable increasing cable loss in
the passive distribution network toward the higher frequency end of the band.
Line-power at 5 V DC is available at the UHF antenna input for a
PRO
ception
proMHD11L or proMHD11M preamplifier which may be required if the off-air
UHF signals are low, or the antenna downlead is long.
A fourth input AUX UHF is provided to allow connection of locally-generated
signals such as CCTV. This auxiliary input has lower gain than the main UHF input
to minimise noise degradation of the antenna signals. Each of the four inputs has
its own gain control, allowing simple optimisation of the outgoing signal levels.
The amplifier is intended to be used with a passive distribution network using
splitter and tap-off units from the
PRO
ception proSPL and proTAP ranges. It is also
suitable for use in conjunction with the passive terrestrial type of satellite
multiswitch in integrated reception systems (IRS) provided that the gain and output
capability are compatible with the requirements of the particular multiswitch(es)
used. An accurate directionally-coupled monitor point is provided, allowing simple
and precise set-up of the outgoing signal levels a feature probably unique in an
amplifier of this class.
Application guidance
Passive network design
The amplifier is suitable for feeding passive networks with attenuation of up to
about 32 dB at VHF, rising to around 40 dB at the top of the UHF band. The
accompanying application example diagram (Fig. 1) shows the star-wired approach
where all the taps are located near to the amplifier, with direct drop cables to
each outlet. With the tap values shown the drop cable length can be up to around
55 m of 100 size benchmarked cable. The Fig. 1 system is easily scaled for a
smaller number of outlets by omitting some of the tap banks and changing the
initial proTAP812 to a 4- or 6-way splitter to minimise the overall attenuation.
