11
English
2. PRODUCT DESCRIPTION
OPT-TX 15x0 is an optical transmitter for distributing satellite and digital terrestrial signals through a
single-mode fibre optic cable.
The incoming RF signals to the OPT-TX 15x0 transmitter are converted and distributed through a
single-mode fibre optic that can be split by splitters and passive taps enabling them to be sent to
multiple optical connections (PON=Passive Optical Network) using a single transmitter. The optical
signal can be converted into RF using OPT-RX DT, OPT-RX QUATTRO or OPT-RX TV.
The system requires the use of a conventional LNB and provides a traditional 5 core output (4 SAT
+ 1 TV) to enable a cascadable installation to additional transmitters or to a traditional multiswitch
system. The AGC (Automatic Gain Control) in the transmitter makes the product configuration
much easier by automatically adjusting the input signal level to the optical laser.
SAT IN:
F input connectors for the four IF satellite polarities (950 ÷ 2150MHz) with LNB remote
power
TV IN:
F input connector for the TV signal (87 ÷862MHz)
TEST SAT:
F output connector for the SAT test signal, HH polarity, 60dBµV transponder level
TEST TV:
F output connector for the TV signal 87 ÷ 862MHz , 74dBµV overall power)
OPTICAL OUTPUT:
SC-APC output connector for the optical transmitter for the fibre link
SAT OUT:
F output connectors for the four IF satellite polarities (950 ÷ 2150MHz) for possible
cascade applications to other devices
TV OUT:
F output connector for the TV signal (87 ÷ 862MHz)
POWER ON LED:
On (green) to show the product is turned on.
ALARM LED:
when ON, it shows the limitation of the laser power.
Earthing the antenna installation (according to EN60728-11 standard).
2.1 System Functions
The headend system in a fibre optic distribution network uses traditional receptive devices, i.e.
aerials, dishes and traditional LNB’s and any signal equalisation and amplification units.
TV and SAT signals are sent to an OPT-TX 15x0 optical transmitter, which converts the electrical
signals into luminous signals, therefore enabling the distribution via a fibre optic infrastructure over
long distances. The fiber optic carries the signals.
Like traditional systems, each time this signal has to be split over a number of lines, a device called
an optical divider or optical splitter (VOV or VOT) is used to split the signal into a number of optical
transport lines without any fall in quality even with a calculated attenuation.
Once the optical signal is in the vicinity of the unit to be served, it is reconverted into a traditional
signal by the OPT-RX DT or OPT-RX QUATTRO or OPT-RX TV optical receivers which on output
generate the RF signals provided to the end user by means of traditional components.
PLANT VIEW OF OPT-TX 15x0 TRANSMITTERS AND CONNECTOR INDICATIONS
}
SAT
Input
TV
Input
Test
SAT
}
SAT
Output
Optical
Output
TV
Output
Test
TV
LED allarme
Connettore di alimentazione
LED alimentazione
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