DVB-S2 vs. DVBS2X

[electrosat]

The main tuner for the Edision OS mio 4K s listed as including DVB-S2X with ACM. In OpenVix, when I do a "Signal Finder" scan by entering my own user defined transponder information, the choice for "System" is either DVB-S2 or DVB-S, with DVB-S2X not being an option.

Likewise, the TNAP image Manual Scan does not list DVB-S2X as an option under its "System" choice with DVB-S and DVB-S2X also being the only options.

There was a football game last night that was listed as being a DVB-S2X, 32 APSK feed. When I entered the transponder information and then chose DVB-S2 on OpenVix's Signal Finder scan (System Choice), I had a strong lock on the channel, but I could not scan the game in.

So my question is, does the OpenVix "Signal Finder" scan include DVB-S2X even though it is not an option for the "System Choice" ?

 

[Titanium]

As I don't have a DVBSX signal to test. I asked El Bandidio to assist. Here is his reply:

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DVB-S2X is an extension of DVB-S2. LinuxTv has not defined DVB-S2X, so any DVB-S2X transponder will be shown as DVB-S2. The FEC is also different for DVB-S2X. The tuner driver will set the DVB-S2X FEC to Auto.

The MIO Tuner will Auto-Detect many of the transponder settings. All you need to enter for a successful scan is transponder frequency, polarity, and symbol rate. The tuner driver will take care of the rest

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What was the signal strength (SNR) for the TP? What was the FEC?

 

[primestar31]

These are the signal levels required for DVB-S2 signals at 16 and 32APSK. Not sure if s2x needs even better. You'd need a large dish, and a very well tuned system for the higher fec's:

 

[comfortably_numb]

These are the signal levels required for DVB-S2 signals at 16 and 32APSK. Not sure if s2x needs even better. You'd need a large dish, and a very well tuned system for the higher fec's:

View attachment 141210

Personally, I've never seen anything over FEC 5/6 on my setup. I've seen a few (and I mean very few) 16PSK signals (there is one on 95 Ku right now) but never an FEC over 5/6.

 

[c-spand]

Personally, I've never seen anything over FEC 5/6 on my setup. I've seen a few (and I mean very few) 16PSK signals (there is one on 95 Ku right now) but never an FEC over 5/6.

I am scanning 95w . What are the parameters for your signal?

 

[comfortably_numb]

I am scanning 95w . What are the parameters for your signal?

It's data, no video.

 

[c-spand]

oh i have seen that one too. sr45000.

 

[electrosat]

As I don't have a DVBSX signal to test. I asked El Bandidio to assist. Here is his reply:

- - - - - -

DVB-S2X is an extension of DVB-S2. LinuxTv has not defined DVB-S2X, so any DVB-S2X transponder will be shown as DVB-S2. The FEC is also different for DVB-S2X. The tuner driver will set the DVB-S2X FEC to Auto.

The MIO Tuner will Auto-Detect many of the transponder settings. All you need to enter for a successful scan is transponder frequency, polarity, and symbol rate. The tuner driver will take care of the rest

- - - - - -

What was the signal strength (SNR) for the TP? What was the FEC?

Hi Brian,

Here is the exchange between myself and a member on another forum:

_________________

Quote:
Originally Posted by Electrosat


I have a good lock on this, but it will not scan in on my Edision OS mio. Is this the UCLA game?


"121 W 3800 H 34285 is a ACM signal. It was DVB-S2X 32 APSK about 40 minutes ago, now its DVB-S2X 16 APSK"

"When it was 32 APSK, crazyscan actually showed DVB-S2X. While it did not show the S2X extension when it changed to 16 APSK, it still had a DVB-S2X MODCOD and ROF..."

________________

Unfortunately, I don't know the FEC. The signal strength was bouncing around 11dB, over 80%.

Dan

 

[electrosat]

Ok, so from y'all's responses, it looks like that if you manually enter the transponder information for a "Signal Finder" search, the search will automatically include DVB-S2X channels.

The reason that I wasn't able to scan in the game last night may be that I didn't have enough signal strength for a DVB-SX2 signal (according to primestar31's chart above).

Looks like I'm gonna need a bigger dish.

Thanks for everyone's replies.

Dan

 

[Titanium]

ACM and VCM use changing FEC parameters to provide reliable delivery within the link budget agreement. Yes, an 11dB SNR would be marginal for 16APSK and below the level required for 32APSK. This is when a 5+ meter dish comes in handy!

 

[comfortably_numb]

Well, primestar31 guess what? There is an FEC 9/10 signal active on 91 right now: 11804 V 5000

 

[ZetaMale]

Even if I was able to afford a 5 meter dish, the city would refuse the permit. Too bad the wife prefers to live within the city limits. I could buy some property outside the city limits and install a microwave link back to the house. That is, if I could afford it. Then there's the issue of cost versus benefit.......

 

[Titanium]

I could buy some property outside the city limits and install a microwave link back to the house.

That is how I watch C-band at home. The C-band dish, receiver and controller are at my office and link 1/2 mile back to the house.

 

[comfortably_numb]

If my boss would let me put a C-band dish on the roof of our complex, I'd put a 12-footer up there and Sling it to my house

 

[FTA4PA]

That is how I watch C-band at home. The C-band dish, receiver and controller are at my office and link 1/2 mile back to the house.

That is cool! What is required to doing something like that?

 

[Titanium]

Use Ubiquiti Networks Bullet M2 transceivers with a 3' grid antenna at the office and a 2' grid antenna at home. Set-up a private point to point WLAN between the office and home.

At home use a PC connected to the TV to control either the TBS tuner via VPN or The Edision Mio via WebIF. Used to use Sling, but retired it last year.

 

[FTA4PA]

Use Ubiquiti Networks Bullet M2 transceivers with a 3' grid antenna at the office and a 2' grid antenna at home. Set-up a private point to point WLAN between the office and home.

At home use a PC connected to the TV to control either the TBS tuner via VPN or The Edision Mio via WebIF. Used to use Sling, but retired it last year.

Thanks!

 

[Cham]

Those Ubiquti Bullet M2/M5 radios are quite handy, been able to catch wifi signals using a 1m offset dish about 40mi away using a tin can feed horn. The M5 might be better for high bitrate satellite feeds though, the 2.4 GHz can be marginal if there is any kind of interference. Need line-of-sight.