9362576b, Operating Manual Twin-DVR Sat Receiver ... - Kathrein
9362576b, Operating Manual Twin-DVR Sat Receiver ... - Kathrein
9362576b, Operating Manual Twin-DVR Sat Receiver ... - Kathrein
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Short Technical Guide<br />
Short Technical Guide<br />
DiSEqC<br />
DiSEqC components<br />
DVB MPEG-2<br />
EB/NO ratio<br />
FEC<br />
OTR<br />
PID<br />
DiSEqC (Digital <strong>Sat</strong>ellite Equipment Control) is a communication<br />
system between a satellite receiver (master) and the peripheral<br />
satellite components (slaves), such as LNBs, multi-switches, rotating<br />
antenna systems.<br />
It is a single master/multi-slave system, i.e. there is only ever one<br />
master in the satellite system. All activities start from the master.<br />
If DiSEqC switching matrices are cascaded, the master receiver<br />
must transmit the DiSEqC signal several times, so that all<br />
DiSEqC multi-switches in the cascade receive their commands.<br />
These days, DiSEqC components (slaves) must be reverse<br />
compatible, i.e. respond to the analogue switching criteria from<br />
receivers that are only equipped with H/V and 22 kHz control signals.<br />
A DiSEqC switching matrix will work with analogue switching critiera<br />
until the DiSEqC command from the master is received. All<br />
analogue switching criteria are then ignored.<br />
DVB is the abbreviation for Digital Video Broadcasting. DVB-S refers<br />
to the transmission method (S = satellite). MPEG is the abbreviation<br />
for Moving Picture Experts Group, a working group that formulates<br />
internationally applicable standards for the digital compression of<br />
video and audio. MPEG-2 has established itself as the standard for<br />
compression of digital TV signals. MPEG-2 works up to a data rate of<br />
100 MBit/s.<br />
The EB/NO ratio is a measure of the signal to noise ratio of a digital<br />
signal. The value is not identical to the C/N value familiar from<br />
analogue reception technology. At EB/NO values below 5 dB no<br />
reception is normally possible.<br />
FEC is the abbreviation for Forward Error Correction. The FEC error<br />
rate corresponds to the Viterbi rate.<br />
One Touch Recording<br />
The PID (Packet IDentification) number is an identification number for<br />
video signals and audio signals in the digital data stream of DVB-<br />
MPEG-2 signals. The receiver uses the PID number to create a<br />
unique assignment for the video and audio data transmission. The<br />
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