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wejones

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Reply with quote  #1 
Wasn't sure which category to put this in, but since observations require computer, putting it here.

I think I may have seen one or both of these before, but didn't trust my reception until leaves started falling off trees.

First transponder is approximately at 4195 V.  On my 6983 and 5927, I cannot lock it, however the constellation pattern in Crazyscan shows a square 4x4 pattern of 16 spots, that I assume is a QAM signal.  Since my 5520 is supposed to do QAM in terrestrial modes, thought that perhaps it might somehow be able to make some sense out of the signal, however not only does it not lock, but the constellation pattern just looks like a square but random pattern.  Anyway, just curious if anyone else sees the same thing and might have an idea of what it might be.  Just curious.

Second transponder is at 3832 V 17138 Ks 3/4.   It locks with 12 dB showing CCM and transport stream, so there should be plenty of signal there.  However, when I stream to TSREADER, it shows tons of errors, and thousands of PIDs.  It must be in some strange mode, or possibly it's in generic stream mode, but isn't identifying as such.  Again, just curious what other people are seeing on this transponder and what it mode it might be in.  Just curious as it's not common to see a strong CCM TS signal showing just gibberish.

photoman76

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Reply with quote  #2 
I've seen this type of signal a few times before.
The TBS 5925 will lock it and shows normal parameters but displays a zillion pids with continuity errors.

My TBS 6522 and your TBS 5520 should show the following:

3833 V 13301
DVB-S2 8psk
3/4 FEC
Pilot ON
Stream Type = Packetized
Roll Off = 0.05

Roll Off below 0.20 would indicate that the signal is DVB-S2X.
If you check the "Update modulation info" box, the stream type changes from Transport to Packetized.



photoman76

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Reply with quote  #3 
They seem to be changing the SR.
Now it's 15230.
photoman76

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Reply with quote  #4 
The TBS 5925 shows this constellation on 4195V.
No Lock.

4195V.jpg 

wejones

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Reply with quote  #5 
Quote:
Originally Posted by photoman76
I've seen this type of signal a few times before.
The TBS 5925 will lock it and shows normal parameters but displays a zillion pids with continuity errors.

My TBS 6522 and your TBS 5520 should show the following:

3833 V 13301
DVB-S2 8psk
3/4 FEC
Pilot ON
Stream Type = Packetized
Roll Off = 0.05

Roll Off below 0.20 would indicate that the signal is DVB-S2X.
If you check the "Update modulation info" box, the stream type changes from Transport to Packetized.



Well, before, I wasn't getting Packetized, only transport, on all three receivers. However, with the 5520, I was using the regular Crazyscan that I've used for quite a while, because I haven't noticed any significant difference.  However I just now checked again, and I observed the change in SR you mentioned, so I re-scanned, and then noticed that the SNR and BER were going from normal to no signal off and on.    So I switched to the newer Crazyscan that Crazycat had mentioned.  Now, I'm seeing the Rolloff at .05, and the stream type as Packetized.  However it's still showing up as being regular DVB-S2, not DVB-S2x. Plus it still shows the thousands of random PIDs.  The 5520 is supposed to be able to do S2x, but it may not be easy to get it to do that.


wejones

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Reply with quote  #6 
Quote:
Originally Posted by photoman76
The TBS 5925 shows this constellation on 4195V.
No Lock.

4195V.jpg 

That's pretty much what the 5520 showed on that transponder.  Ie probably a 16 QAM square but with poor sync so the spots are all blurred out.

photoman76

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Posts: 11,250
Reply with quote  #7 
If the stream type is packetized or continuous, you will see thousands of pids with continuity errors and no channels will scan in.




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Fellow Members, your posts are welcome here! Do not worry about posting everything perfect. Different receivers and LNB's will give you different Frequencies and Symbol Rates. Some set top boxes, PCI cards and USB receivers, Do Not Require all of the same information that others may need. It is not Required to post everything that others may need to tune in a feed. It is just most important to share the find. We can always adjust the Frequency and Symbol Rates and try the various Modulations and FEC's on our own receivers until we get a lock and then give a polite reply with what works for your receiver, as that information might help others as well. We all appreciate the efforts and energy of the Posters!

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