Minimum CNR, Carrier to Noise Ratios for DVB S2 Reception

[Titanium]

Saw this referenced before and it is a great guide for minimum signal necessary for receiving DVBS2 channels. Credit to Boblop over on Rick's for this recent posting of the link.

http://www.satbroadcasts.com/news,8...e_ratio_values_CNR,_CN_for_DVB_S2_system.html

 

[Cham]

Certainly see why we are needing 12'+ reflectors these days for those 16 and 32 apsk feeds! I see the same as the chart using my 10' dish, 16apsk is getting marginal where 32apsk it's not cutting it.

 

[Babadem]

Saw this referenced before and it is a great guide for minimum signal necessary for receiving DVBS2 channels. Credit to Boblop over on Rick's for this recent posting of the link.

http://www.satbroadcasts.com/news,8...e_ratio_values_CNR,_CN_for_DVB_S2_system.html

Very informative.

 

[skysurfer]

don't forget even if you have enough c/n, you also need what I call a "clean carrier". Your DVB-S2 carrier of interest needs to be clean from the noise floor through the carrier and to the noise floor on the other side.

"Clean" refers to no nearby satellite interference or polarity offset issues such as not having the H and V pols dead on for a linear polarized satellite. In one instance, Pop's DVB-S2 carrier is not lockable on one of my dishes because I get a little bit of CSPAN analog signal showing up at the edge of the Pop carrier, keeping it from being clean. On another slightly larger dish, it's 2 deg spacing compliant so CSPAN's analog signal doesn't creep into the area of the Pop carrier and thus I get a lock.