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

COFDM- COFDM CI

Important safety instructions

General installation conditions
• Before handling or connecting the equipment, please read this
manual.
• In order to reduce the risk of fi re or electric shock, do not expose the
equipment to rain or moisture.
• Do not take the cover off the equipment without disconnecting it
from the mains.
• Do not obstruct the equipment's ventilation system.
• Please allow air circulation around the equipment.
• The equipment must not come into contact with water or even be
splashed by liquids. Do not place containers with water on or near the
equipment if it is not adequately protected.
• Do not place the equipment near sources of heat or in excessively
moisture conditions.
• Do not place the equipment where it may be aff ected by strong
vibrations or knocks.
• This symbol indicates that the equipment complies with
the requirements of CE mark.
NOTE: The complete user manual is available in the CD
that is provided with the product.
Technical specifi cations
Input frequency
Input connectors
COFDM input
Frequency steps
Input level
Input impedance
Constellation
Guard interval
COFDM *
Modulator
FEC
Scrambling
Output frequency
Frequency steps
COFDM output
Bandwidth
Maximum output level
Attenuation
Consumption**
General
Index of protection
* The transmodulator is completely transparent to the COFDM input modulation, and therefore it keeps its parameters at the output.
**Consumption of the CAM unit depends on the type of CAM used. It is considered a consumption of 50 mA for the preamplifi er.
The technical characteristics described are defi ned for a maximum ambient temperature of 45°C (113ºF). Forced ventilation is used for higher temperatures.
Inputs/Outputs/Connections description
The unit (Fig. 1) is provided with:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Programmer unit 7234
Introduction
The COFDM-COFDM CI transmodulator receives a digital terrestrial television
(DTT) multiplex (DVB-T standard) and demodulates it to get a transport
stream packet, which is processed to remove and/or unscramble services.
To unscramble, the transmodulator has a Common Interface slot for the
insertion of a conditional access module (CAM).
Subsequently, the TS packet is modulated in the same COFDM modulation
format of its input (DVB-T standard), and converted to the output channel
(UHF or VHF with a maximum bandwidth of 8 MHz) using an agile up-
converter.
The programming of the transmodulator operating parameters (input
frequency, output channel and adaptation of services mainly) is performed
through the universal programmer (ref. 7234).
177,5 - 226,5 (VHF) (Select.)
MHz
474 - 858 (UHF)
type "F" female
KHz 125, 166 (Select.)
dBm -60 to -20
ohm. 75
QPSK, 16QAM, 64QAM
1/4, 1/8, 1/16, 1/32
1/2, 2/3, 3/4, 5/6, 7/8
DVB ET300744
177,5 - 226,5 (VHF) (Select.)
MHz
474 - 858 (UHF)
KHz 125, 166 (Select.)
MHz 7, 8
dBμV 80 ±5
dB >15 (Select.)
250 (no CAM module inserted and without powering preamplifi ers)
24V
300 (with CAM module inserted and without powering preamplifi ers)
mA 24V
300 (no CAM module inserted and powering preamplifi ers)
typ. 24V
340 (with CAM module inserted and powering preamplifi ers)
24V
IP20
COFDM input
COFDM output
RF input
RF output + 1Ch COFDM
Powering BUS connectors
Status LED
Control BUS connector
Slot CAM
Programmer / PC connector
Input VSWR
Bandwidth
Through loss
Input line powering
Interleaving
Cell_id
Spectral inversion
Through loss
Return loss
Output connectors
Output impedance
dB typ. >10
MHz 7, 8
dB typ. < 1,5
Vdc 0, 12, 24 (Select.)
DVB ET300744
Auto
Normal / Inverted
dB typ. < 1,5
dB typ. > 12
type "F" female.
ohm. 75
6