Satlink WS-6906 Meter

I can't mine to work on any of the DirecTV satellites. It's useless junk until we get some U.S. support.

 

Well, it's a junk for those who don't know a damn thing about difference of DTV DSS and world DVB-S signals.

 

I also have the same problem. Even though I hand loaded the parameters for the DTV satellites, I still can't see them with my meter. Has anyone had any success getting this meter to see the U.S. satellites?

 

Loading the parameters for Directv's satellites won't help if the meter can't handle DSS, which it can't.

 

same for Ka/Ku DVB-S2D,
what is modified [AMC enforced] world standard become non-standard for such meters in USA

 

What is the difference between Directv's DVB-S2D and standard DVB-S2?

 

using "AMC" - see DTV patent

 

Do you have a patent number for the one you're talking about?

 

if I will find papers what I printed a few years ago... you could easily reproduce my steps eg find it in Internet

 

I did some digging around last night after seeing your post, and while I could find some patents mentioning AMC i.e. Advanced Modulation/Coding (like in Directv's original HMC patent) I couldn't find anything specifically detailing it. So if you could dig up that patent number it would be much appreciated!

One thought though - Directv has used various tuner chips from multiple vendors in their HD receivers over the year, none of which specifically call out DVB-S2D support like they do DSS support. So it is interesting that even hardware using the same tuner chips as in Directv hardware can't handle DVB-S2D - they can't even demodulate to the point of calculating BER / CNR. There may be some initial settings required on the chip's registers to handle DVB-S2D, and no one has cared enough to figure out what they are. Since the video is scrambled in a whole separate layer dependent on the access card, the only commercial gain from decoding DVB-S2D would be the ability to make a meter that can show CNR for Directv's Ka transponders. Directv already has the AIM, so the market for such a widely interoperable meter would be pretty small.

Directv is part owner of the DVB-S2 patent licensing pool (perhaps via their past ownership by Hughes?) so they may have more flexibility to depart from the standard than other licensees - often patent licenses require adherence to published standards to preserve interoperability.

 

You/re right on all counts, the designator "D" has been added by Lyngsat to distinguish WW DVB-S2 signals from DTV's DVB-S2 + AMC mix.
The company (IMO, over paranoid) keep own card close to a chest, hence using additional level of protection at RF modulation level.