DBC Digital DVB S2 Satellite Finder

[Biswajit.HD]

if yes pl provide info abt the channels on dish tv sd which are being transmitted on dvb s2 standard..... :huh

thanks...

 

[Biswajit.HD]

Digital Video Broadcasting - Satellite - Second Generation (DVB-S2) is a digital television broadcast standard that has been designed as a successor for the popular DVB-S system. It was developed in 2003 by the DVB Project, an international industry consortium, and ratified by ETSI (EN 302307) in March 2005. The standard is based on, and improves upon DVB-S and the electronic news-gathering (or Digital Satellite News Gathering) system, used by mobile units for sending sounds and images from remote locations world-wide back to their home television stations.
DVB-S2 is envisaged for broadcast services including standard and HDTV, interactive services including Internet access, and (professional) data content distribution. The development of DVB-S2 coincided with the introduction of HDTV and H.264 (MPEG-4 AVC) video codecs.

Two new key features that were added compared to the DVB-S standard are:

A powerful coding scheme based on a modern LDPC code.
VCM (Variable Coding and Modulation) and ACM (Adaptive Coding and Modulation) modes, which allow optimizing bandwidth utilization by dynamically changing transmission parameters.

Other features include enhanced modulation schemes up to 32APSK, additional code rates, and the introduction of a generic transport mechanism for IP packet data including MPEG-4 audio–video streams, while supporting backward compatibility with existing MPEG-2 TS based transmission.
DVB-S2 achieves a significantly better performance than its predecessors – mainly allowing for an increase of available bitrate over the same satellite transponder bandwidth. The measured DVB-S2 performance gain over DVB-S is around 30% at the same satellite transponder bandwidth and emitted signal power. When the contribution of improvements in video compression is added, an (MPEG-4 AVC) HDTV service can now be delivered in the same bandwidth that supported an early DVB-S based MPEG-2 SDTV service only a decade before.

Source : Wikipedia

 

[Hero]

have u tried on dish tv sd?? to find dvb s2 signals..

Ya! Successfully! D2H frequencies founded. Just aim for searching satellites.

No any channel transmitted in DVB - S2 format from Dish TV. I think u dont get what I told. Suppose there is TP 11483 V from D2H which is DVB - S2. When I tune TP & align dish for the TP, I find signal when dish direct to the satellite. Thats it. Significance is Dish TV box can catch / find DVB - S2 signals. Thats it again. Dish TV SD box can only show channels which are in MPEG - 2 format & only audio if it is any advanced format expect MPEG - 2.

If in a TP there is no any FTA channel / signal strength is below 50% or not enough then dish TV box shows signal strength and quality in red color & if there is any FTA channel from TP Dish TV shows it in Green Colour.

 

[Hero]

8 QPSK & 16 QPSK are type of modulations but what is it actually? Definition?

Thanks.

 

[Biswajit.HD]

have u tried on dish tv sd?? to find dvb s2 signals..

Ya! Successfully! D2H frequencies founded. Just aim for searching satellites.

No any channel transmitted in DVB - S2 format from Dish TV. I think u dont get what I told. Suppose there is TP 11483 V from D2H which is DVB - S2. When I tune TP & align dish for the TP, I find signal when dish direct to the satellite. Thats it. Significance is Dish TV box can catch / find DVB - S2 signals. Thats it again. Dish TV SD box can only show channels which are in MPEG - 2 format & only audio if it is any advanced format expect MPEG - 2.

If in a TP there is no any FTA channel / signal strength is below 50% or not enough then dish TV box shows signal strength and quality in red color & if there is any FTA channel from TP Dish TV shows it in Green Colour.

i got what u told but there is no channels on dish tv sd in dvb s2... i dont know abt d2h.... i m specifically asking for dish tv sd..

 

[Biswajit.HD]

Quadrature Phase Shift Keying (QPSK) is a form of Phase Shift Keying in which two bits are modulated at once, selecting one of four possible carrier phase shifts (0, 90, 180, or 270 degrees). QPSK allows the signal to carry twice as much information as ordinary PSK using the same bandwidth. QPSK is used for satellite transmission of MPEG2 video, cable modems, videoconferencing, cellular phone systems, and other forms of digital communication over an RF carrier.

.
QPSK Symbol Constellation

 

[Biswajit.HD]

For more info abt qpsk modulation refer this link : http://www.dsplog.com/2008/07/08/compare-bpsk-qpsk-4pam-16qam-16psk-64qam-32psk/

 

[Hero]

Dish TV SD format = DVB - S, MPEG - 2

D2H SD format = DVB - S2, MPEG - 4, QPSK / 8 QPSK Either

I just info here that I can use Dish TV box for align antenna to D2H Satellite.

 

[Biswajit.HD]

Please try and if successful kindly post details... want practical explanation so that it will be helpful for all members also.... awaiting ur practical info details... :huh

 

[Biswajit.HD]

ya... it supports DVB S2 HD signals too....