Connections

 

 

SAT inputs A and B:

2

F sockets
HF output (modulators):

1

IEC socket
Connection strip (10-pin):for supply voltages and control circuits
Socket RS 232:serial interface for software update
Conditional access:2 channels can be decoded
2.4Description

The twin transmodulator cassette is a QPSK-converter, which converts all sta- tions modulated according to DVB-S1standard and QPSK2 into two PAL-modu- lated cable signals. The cassette has two digital SAT IF inputs and an HF output. It is equipped with two channel strips (“A” and “B”). Each channel strip consists of a digital tuner, a digital signal preparation unit and a modulator.

The channel strip “A” can decode encoded channels via a corresponding CA module. Depending on the CA module and the smart card, two channels can be decoded simultaneously with one CA module, with the second one supplied via channel strip “B”. The control of the cassette takes place via the control unit of the head-end station. By means of the “a” and “b” levels of the channel strips, channel selection according to a timer is possible. The cassette‘s channel strips are indicated by “Bx A / Bx a“ or “Bx B / Bx b” (“Bx a” / “Bx b” – time controlled channel switch over) in the control unit display.

The prepared input signals reach the HF output collector of the head-end station via the HF output socket. The common output level of the channel strips can be set with the level regulator at the output collector of the head-end station.

When the head-end station is switched on, the two-line LC display briefly shows the software version of the control unit.

To operate this cassette the software version of the control unit must be “V 37” or higher. You can find the current operating software for the control unit and the cassette, the software “BE-Flash” and the current assembly instructions on the website “www.gss.tv”.

The cassette is designed for use in the following head-end stations:–STC 316

–STC 1200

–STR 19-8

1DVB-S – Digital Video Broadcasting - Satellite

2QPSK – Quadrature Phase Shift Keying

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