USB DVB-S2 only picking up 1 Sky transponder

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indapie2000

196 posts

Master Geek

#201328 14-Aug-2016 14:42

Sorry if this has been asked before, I've tried searching but not found anything that matches my problem.

I live in an apartment in Wellington, we have a comms cabinet inside the apartment where we can connect the phone line, TV cables etc to different plugs around the apartment.

We've only used DVB-T for TV but I decided to experiment with DVB-S.

I have a TBS 5980 USB tuner http://www.tbsdtv.com/products/tbs5980-dvb-s2-ci-tv-tuner-usb.html

I've figured out which cable in the comms carries the satellite signal, programmed the LNB settings (after some trial and error sine I can't physically check the dish myself) to DVBViewer to 10750 but only ever seem to pick up the Sky transponder 12268 (Sky Sports, ESPN etc.)

None of the Freeview frequencies comes up, is there something I might be doing wrong or is it possible the TBS tuner is faulty? Any help is appreciated

Thanks

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8955 posts

Uber Geek

#1611395 14-Aug-2016 15:28

Do you have to specify LO Hi & Lo? If so, what are these set to, and what is the switch frequency?

indapie2000

196 posts

Master Geek

#1611399 14-Aug-2016 15:48

Low is 10750, high is 0 and switch 11800

RunningMan

8955 posts

Uber Geek

#1611406 14-Aug-2016 16:06

OK, Try Lo and Hi set to 10750, and set the switch to something artificially high like 15000

indapie2000

196 posts

Master Geek

#1611488 14-Aug-2016 18:36

Still brings up the same 7 Sky channels on 12268 plus also it shows on 12271

fe31nz

1231 posts

Uber Geek

#1611621 14-Aug-2016 23:08

I have only used DVBViewer with my TBS-5922 USB DVB-S2 tuner via a SAT>IP connection and minisatip on my MythTV box, but it seemed to find all the Sky transponders I tried it on. The LNB settings I was using were:

LNB type: 10750 LOF

LOF1: 10750

LOF2: empty

LOF SW: empty

The difference from your settings being that I had the LOF SW setting empty instead of having a value. Sky dish LNBs do not have a switch (they are single local oscillator LNBs).

When using DVBViewer's TransEdit 4.1.2 program to do channel scanning, the settings were:

LOF1: 10750

LOF2: empty

LOF SW: 65535

For the DVB-S (SD) Sky transponders, the other settings that work are:

Polarization: H

Modulation: QPSK

Symbolrate: 22500

FEC: 3/4

The list of transponders is available on Lyngsat:

http://www.lyngsat.com/Optus-D1.html

which will have the right settings for the DVB-S2 (HD) transponders.

Minisatip (on my Linux MythTV box) was able to do the decryption of the Sky channels with my Sky card in its card reader using Oscam via DVBAPI.

openmedia

3329 posts

Uber Geek

Trusted

#1611627 14-Aug-2016 23:32

Where did you pickup the USB DVB-S2 tuner as i'm after one myself.

Generally known online as OpenMedia, now working for Red Hat APAC as a Technology Evangelist and Portfolio Architect. Still playing with MythTV and digital media on the side.

fe31nz

1231 posts

Uber Geek

#1611652 14-Aug-2016 23:44

openmedia:

Where did you pickup the USB DVB-S2 tuner as i'm after one myself.

I bought mine from the web shop the TBS web site directed me to:

http://www.buydvb.net/dvbs2s-tv-tuner-usb-c-3.html

It is a while ago now, but my recollection is that the delivery charges were reasonable and the delay not too excessive for a postal delivery. These days, the TBS web site has a few more options for web sites that sell their product, including Aliexpress. The TBS web site is here:

http://www.tbsdtv.com/

There do not seem to be any local shops offering DVB-S2 USB tuners that I know of.

Sharesies

Trade NZ and US shares and funds with Sharesies (affiliate link).

indapie2000

196 posts

Master Geek

#1611894 15-Aug-2016 13:11

fe31nz:
I have only used DVBViewer with my TBS-5922 USB DVB-S2 tuner via a SAT>IP connection and minisatip on my MythTV box, but it seemed to find all the Sky transponders I tried it on. The LNB settings I was using were:

LNB type: 10750 LOF

LOF1: 10750

LOF2: empty

LOF SW: empty

The difference from your settings being that I had the LOF SW setting empty instead of having a value. Sky dish LNBs do not have a switch (they are single local oscillator LNBs).

When using DVBViewer's TransEdit 4.1.2 program to do channel scanning, the settings were:

LOF1: 10750

LOF2: empty

LOF SW: 65535

For the DVB-S (SD) Sky transponders, the other settings that work are:

Polarization: H

Modulation: QPSK

Symbolrate: 22500

FEC: 3/4

The list of transponders is available on Lyngsat:

http://www.lyngsat.com/Optus-D1.html

which will have the right settings for the DVB-S2 (HD) transponders.

Minisatip (on my Linux MythTV box) was able to do the decryption of the Sky channels with my Sky card in its card reader using Oscam via DVBAPI.

I had a quick try at these settings his morning(running late for work so didn't get much of a chance) but still only the same Sky channels.
Will try again tonight but I'm wondering if there might be an issue with the cable that connects to my tuner? The signal seems to come and go, 1 scan in transedit shows those sky channels but then the next they gone.

Signal strength when running the analise feature shows at 24%

A few weeks ago I did get the Freeview channels and not those sky ones, now it's the opposite.

fe31nz

1231 posts

Uber Geek

#1612101 15-Aug-2016 18:01

In case it helps, here are the current transponder frequencies I am using to scan for channels (Hz):

Sky DVB-S2 (HD): 12267000 12295000 12331000 12358000
Sky DVB-S (SD): 12394000 12421000 12519000 12546000 12581000 12608000 12644000 12671000 12707000 12734000

Freeview DVB-S (SD): 12456000 12483000

RunningMan

8955 posts

Uber Geek

#1612109 15-Aug-2016 18:20

There certainly seems to be some fault, perhaps with cabling. As above, it's pretty rare for LNBs in NZ to have dual oscillators. The settings you have allow for setting the LO frequencies of two oscillators, and the frequency at which the receiver switches between the two. Generally speaking, setting a switch frequency higher than the highest frequency transponder should force it to stay on the low frequency, and as long as that matches the actual LNB frequency, all should be well.

Is it possible to check with the building manager or someone knowledgeable to confirm the LNB settings, just in case there is something odd fitted (unlikely, but possible) - you could try setting it to "universal LNB" if the option is there...

Rickles

2937 posts

Uber Geek

Trusted

#1612161 15-Aug-2016 19:32

If the LNB has been replaced sometime it may be a single-throat model ... change settings to 11300 and scan again?

indapie2000

196 posts

Master Geek

#1612254 15-Aug-2016 23:23

RunningMan:

There certainly seems to be some fault, perhaps with cabling. As above, it's pretty rare for LNBs in NZ to have dual oscillators. The settings you have allow for setting the LO frequencies of two oscillators, and the frequency at which the receiver switches between the two. Generally speaking, setting a switch frequency higher than the highest frequency transponder should force it to stay on the low frequency, and as long as that matches the actual LNB frequency, all should be well.

Is it possible to check with the building manager or someone knowledgeable to confirm the LNB settings, just in case there is something odd fitted (unlikely, but possible) - you could try setting it to "universal LNB" if the option is there...

I've emailed the body corp to see if they know anything (doubt it but will give it a go.)

Changing to 11300 doesn't work, only 10750 and only the Sky channels on tp 12267

I'll also try if a new F-Type cable works (any recommendations about what to look for?)

RunningMan

8955 posts

Uber Geek

#1612294 16-Aug-2016 07:27

Have you tried 10700 for the LOF?

EDIT: Or even 10600 is in use occasionally.

Rickles

2937 posts

Uber Geek

Trusted

#1612297 16-Aug-2016 07:38

Try unselecting "Both" option and selecting only "Free to air" ... you never know

BTW, where in NZ are you?

indapie2000

196 posts

Master Geek

#1612308 16-Aug-2016 08:26

Wellington here.

Gonna get a new F-type cable this morning before and will give it a go tonight, hopefully the body corp reply back to me by then too.

I guess in theory though if I'm getting that 1 Sky tp then I should be able to pick all of the other ones right?

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