Important Safety Instructions; Technical Specifications - Televes T.OX Serie Guía Rápida

DVBS2-QAM TWIN

Important safety instructions

Caution Statements
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer's instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or
other apparatus (including amplifiers) that produce heat.
9. Only use attachments/accessories specified by the manufacturer.
10. Refer all servicing to qualified service personnel. Servicing is required when
the apparatus has been damaged in any way, such as liquid has been spilled or
objects have fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
Warning
Apparatus shall not be exposed to dripping or splashing and no objects filled with
liquids, such as vases, shall be placed on the apparatus.
Safe operation
Should any liquid or object fall into the equipment, please refer to qualified
personnel for service.
Safe installation
Ambient temperature should not be higher than 45°C.
Do not place the equipment near heat sources or in a highly humid environment.
Do not place the equipment in a place where it can suffer vibrations or shocks.
Please allow air circulation around the equipment.
Do not place naked flames, such as lighted candles on or near the product.
Simbology
Equipment designed for indoor use.
The equipment meets the CE marking requirements.
The product is EAC certified.

Technical specifications

Input frequency
Symbol rate
Frequency steps
Satellite
IN/OUT connectors
demodulator
Input impedance
LNB powering
Satellite selection (DiSEqC)
Modulation format
QAM
Symbol rate
Modulator
Factor de roll-off
Block code
Output frequency (selec.)
Frequency steps
RF
output
Max. output level (selec.)
Attenuation (progr.)
Consuptions 24V
(with signal)*
General
Protection index
* Maximum consumption measured with input signal. It is considered a LNB maximum consumption 300mA.
The technical characteristics described are defined for a room temperature of 45 ° C (113 ° F). For higher temperatures forced ventilation will be used.
MHz 950 - 2150
Mbaud 2 - 45
MHz 1
type "F" Female
Ohm 75
V /kHz 13-17- OFF / 22kHz (ON-OFF)
A, B, C, D
QAM 16, 32, 64, 128, 256
Mbaud 1,5 - 7,2 (selec.)
% 15
Reed Solomon (188, 204)
MHz 46 - 862
kHz 250
dBµV 80 ±5
dB > 15
mA
IP
Inputs/Outputs/Connections description
The unit (Fig. 1) is provided with:
1. IF satellite input
2. IF satellite output (loop ON) / IF satellite input (loop OF)
3. RF input
4. RF output + 2 CH QAM (module A & module B)
5. Powering BUS connectors
6. Status LED
7. Control BUS connectors
8. Programmer/PC socket
Introduction
The DVBS2-QAM Twin consists of two independent transmodulator modules
A and B. Each of them receives a satellite transponder (in some of the modu-
lation formats defined in the DVB-S or DVB-S2: standard: QPSK or 8PSK) and
demodulates it, obtaining a transport packet that is subsequently processed,
modulated in QAM format and converted to an output channel (UHF or VHF
and maximum bandwidth of 8.28 MHz).
The Transport Stream processing in each module includes the services elimina-
tion, in the case the satellite input rate is too high to be accommodated in an
output QAM signal. The user can choose the input services that will be distribu-
ted in the output, eliminating the unwanted ones and thus reducing the output
binary rate. This filtering capability also includes each individual component
of a service (audio, subtitle, data) which can be selected to be filtered off on a
PID basis.
Each output service can be assigned a channel number (LCN, Logical Channel
Number), that facilitates the search of the services on the TV set. Each module
allows the substitution of the operator_id field (if it is present in the input) and
it can set the versions of the NIT and SDT tables of the output tables, to limit the
cases in which the TV sets require a new search of channels. Finally, the values of
the transport_stream_id, network_id and original_network_id identifiers as well
as the network name in the output tables can be edited by the user.
Each module provides a fixed QAM output baud rate ("stuffing"), as in many
cases the QAM receivers search the frequency band having as variable a single
symbol rate, for example 6.875 or 6.9 Mbaud. This symbol rate is fixed regard-
less of the bit rate in the input signal.
Through losses (typ.)
DVB-S2
Modulation
DVB-S
FEC inner code LDPC
FEC outer code
Roll-off factor
R.O.E. inner (min.)
Scrambling
Interleaving
Bandwidth (max.) MHz
Spectral inversion (selec.)
Through losses (typ.)
Return losses (typ.)
IN/OUT connectors type
Output impedance Ohm
470(without power LNB)
720(one activated LNB)
970(two activated LNBs)
20
dB < 1,5
QPSK, 8PSK
QPSK
9/10, 8/9, 5/6, 4/5, 3/4, 2/3, 3/5, 1/2
BCH(
Bose-Chaudhuri-Hocquenghem)
% 20, 25, 35
dB 10
DVB ET300429
DVB ET300429
8,28
Normal / Inverted
dB < 1,5
dB > 12
"F" Female
75
6