GSS HDM 660 T, Руководство по сборке

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- 6 - HDM 660 T
2.4 d
esCription
The Head-end Digital Modulator COFDM "HDM 660 T", in the following called
COFDM module converts two DVB-S (QPSK) modulated data streams into two
DVB-T (COFDM) modulated data streams. The COFDM module has two SAT-IF
inputs and one HF output. Components (e.g. LNB) which are connected up-
stream can be powered through the SAT-IF inputs.
The COFDM module is equipped with two channel strips (" A " and " B "). The
channel strips consist of the digital SAT tuners, the digital signal processing
levels and an output converter. The output channels are suitable for neighbour-
ing channel assignment and free tunable (no automatic neighbouring-channel
assignment). The channel strips are indicated in the head-end station display
with "
Bx …A " and " Bx …B ".
Using an adequate CA module scrambled channels can be descrambled via
channel strip "
A ". The control of the module takes place via the control unit of
the head-end station.
Two LEDs indicate if the respective channel strip is switched on (LED illumi-
nates) or off, and also provide an indication of the signal quality based on
their colour.
The integrated TPS module (Transport Stream Processing) processes the data
from the demodulated transport streams.
The COFDM modulated HF output signals are sent through the HF output of the
COFDM module to the output collector.
When the head-end station is switched on, the two-line LC display shows the
"
SETUP " menu and the software version of the control unit. The head-end sta-
tion output level can be adjusted in this menu.
To operate the COFDM module the software version of the control unit (head-
end station) must be "
V 8 " or higher. The operating software of the COFDM
module and the head-end station can be updated using a PC or notebook and
the software "
BE-Flash " via the 9-pin D-SUB socket on the head-end station.
You can find the current operating software for the head-end station and the
COFDM module, the software "
BE-Flash " and the current assembly instructions
on the website " www.gss.de ".
The COFDM module is designed exclusively for use in the STC 160 head-end
station.