30 W Feeds

[Adam792]

Which boxes are used by broadcasters to receive DAB+ feeds? I would like to test such signal (not only at 30 West) but my linux skill is very poor, so I have no chance to build any linux-based setup. But I would like to know which type of professional receivers are used. Thanks.

Something like this - FlexXtract+ - 2wcom DAB+ Distribution Extractor It costs around € 2500 from what I can see, but all it does is extract the ETI (encapsulated DAB multiplex stream) data from the satellite feed, just like the Linux ETI-Tools are able to do. The DAB transmitters themselves just take ETI as their input format. So it wouldn't solve your problem of listening to them.

Note that the feeds listed by Flysat as DAB+ on Hispasat 30°W are incorrectly listed - they're not DAB, just IP encapsulated AAC streams (they're actually for the FM networks in Spain and Portugal). The equipment above wouldn't decode these as they're not ETI data. The confusion is because one of the tools included in ETI-Tools (mpe2aac) can decode these too.

 

[7mdish]

Thank you Adam792 for your reply.
Yes I'm totally confused about these types of signal. My thought was: if satellite transponders are used to supply terrestrial transmitters, surely broadcasters must have such equipment to clear sound, what do you think? I believe that many radio signals are distributed on many satellites in Europe for FM, DAB+, cables..... it is a very interesting topic try to receive such transmissions, but it is not so easy for me having no linux skill as I mentioned. Bad luck.

 

[Adam792]

Thank you Adam792 for your reply.
Yes I'm totally confused about these types of signal. My thought was: if satellite transponders are used to supply terrestrial transmitters, surely broadcasters must have such equipment to clear sound, what do you think? I believe that many radio signals are distributed on many satellites in Europe for FM, DAB+, cables..... it is a very interesting topic try to receive such transmissions, but it is not so easy for me having no linux skill as I mentioned. Bad luck.

For the FM ones, yes they will have equipment that clears the sound as the audio has to then be modulated to an analogue FM signal.

For the 30°W ones this will be DVB-IP equipment - for the Spanish and Portuguese radio stations (SER, LOS40, Rádio Comercial, Vodafone FM, etc.), the satellite transponder is being used like a private internet connection. A satellite router will be used, exactly like for people who use internet via satellite services. The audio signals for the radio stations are then available via Ethernet from the satellite router at the studios/transmitters via their respective multicast IP addresses.

For DAB feeds, as the signal is digital, the data is “pre-assembled” in the transport format used for DAB multiplexes (ETI) before being carried over satellite. The DAB transmitter equipment accepts the pre-assembled data in this format and modulates it, only the end user’s radio has to decode the data after it’s been transmitted and received over Band III!

For example, in Linux you can use the Dablin_gtk software to play DAB multiplexes you receive terrestrially if you have a DAB tuner, as well as via satellite, because the final content of the signal is the same format (ETI).

 

[7mdish]

Any chance to have such software for Windows instead of Linux? Thanks.

 

[Dggrr]

Any chance to have such software for Windows instead of Linux? Thanks.

Neither ETI tools nor Dablin interact directly with DVB hardware, i.e. they are network tools that rely on the standard network output of a tuner device. In my case a SF8008 Enigma2 box.

I'm pretty sure both tool sets would work with either Cygwin or Windows Subsystem for Linux on Windows 10/11.

 

[Adam792]

Neither ETI tools nor Dablin interact directly with DVB hardware, i.e. they are network tools that rely on the standard network output of a tuner device. In my case a SF8008 Enigma2 box.

I'm pretty sure both tool sets would work with either Cygwin or Windows Subsystem for Linux on Windows 10/11.

Great idea. Just tried this myself with Windows Subsystem for Linux on Windows 11 and it works perfectly, as well as being pretty straightforward.

I will post more details in the DAB thread.

 

[ViaHussun]

Love Island

30W 12003 V 14400 8PSK 4:2:0
ID: 229 Via 1 ASi

Biss

 

[Adam792]

Can anyone lock the narrow Portuguese IP radio transponder on 12517/12518V any more?

Listed as 12518V 704 3/4 DVB-S2 QPSK. I used to lock it until fairly recently slightly lower on my TBS6905 at 12517.

No signal on it today, I've checked both frequencies and nothing locking. Just wondering if anyone who can do a spectrum scan can see if it's moved slightly further away or been turned off completely?

The Media Capital stations in a similar IP format on 12529V are still there and working as normal (Rádio Comercial etc), as well as the regular DVB-S RTP ones on 12519V.

 

[cirio70]

Nothing for me too.



And the spectrum scan is not helpful..

 

[SimonE]

Can anyone lock the narrow Portuguese IP radio transponder on 12517/12518V any more?

Listed as 12518V 704 3/4 DVB-S2 QPSK. I used to lock it until fairly recently slightly lower on my TBS6905 at 12517.

No signal on it today, I've checked both frequencies and nothing locking. Just wondering if anyone who can do a spectrum scan can see if it's moved slightly further away or been turned off completely?

The Media Capital stations in a similar IP format on 12529V are still there and working as normal (Rádio Comercial etc), as well as the regular DVB-S RTP ones on 12519V.

Adam, I have just checked 12519V for you. There are 9 AAC Radio stations as listed on Lyngsat. The symbol rate is 1481. 12530V 1041 locks but no stations found there. 12520V 704 won't lock here but there is a signal there. on the spectrum display.

 

[maxi_power]

keep working on 12519 V 1481.

 

[SimonE]

Adam, I have just checked 12519V for you. There are 9 AAC Radio stations as listed on Lyngsat. The symbol rate is 1481. 12530V 1041 locks but no stations found there. 12520V 704 won't lock here but there is a signal there. on the spectrum display.

Here's a pic of the three frequencies centered on 12520V

 

[SatSearcher]

Looks like it might have moved frequency slightly and changed SR?

 

[deeptho]

Here is 12519V on tbs6909x with neumoDVB. Nice clean signal. Locks easily.
12518.885 Mhz, 1281 kS/s DVBS



The mux "next door" requires some manual fiddling, to lock: 12520.420 Mhz, 512 kS/s QPSK.
It has no valid PAT, SDT or NIT but can be locked, contains DVB data and has 4 streams.
PID Usage Access Bitrate |
| Total Unreferenced PID's ........................... C Unknown |
| 0x03E9 Unreferenced ................................. C Unknown |
| 0x03EA Unreferenced ................................. C Unknown |
| 0x03EB Unreferenced ................................. C Unknown |
| 0x1038 Unreferenced ................................. C Unknown |
=



So all of this confirms what others wrote above

The spectrum suggests that there would be another mux (about 256 kS/s) in between, at 12519.9V
but the card cannot lock it.

 

[Adam792]

Thanks all for your help , I will investigate 12520.42 with the four PIDs, the lack of any table data would match the old 12517 frequency (and indeed 12529).

These are encapsulated AAC audio in DVB-IP (each PID contains a data-stream with AAC audio inside. The IP packet headers have RDS data for the FM transmitters in Portugal that the system feeds).

Interesting that there’s also another super narrow one in-between this one and the RTP radio one. Presumably another Portuguese radio feed.

 

[Adam792]

Sure enough, it's the same group of stations. They seem to have moved them because Rádio Sim has been removed. There are now only three PIDs in the new 12520.42V transponder carrying audio. The other PID (4152) contains SAP/SDP data with the details for each service -

application/sdpv=0
o=- 1 56 IN IP4 192.168.40.101
s=CH_01
i=RR
a=X-PID:1001
m=audio 10001 RTP/AVP 14
c=IN IP4 229.0.0.1
a=bitrate:0

application/sdpv=0
o=- 2 10 IN IP4 192.168.40.102
s=CH_02
i=RFM
a=X-PID:1002
m=audio 10002 RTP/AVP 14
c=IN IP4 229.0.0.2
a=bitrate:0

application/sdpv=0
o=- 3 33 IN IP4 192.168.40.108
s=CH_03
i=MEGA
a=X-PID:1003
m=audio 10003 RTP/AVP 14
c=IN IP4 229.0.0.3
a=bitrate:0

So PID 1001 is Rádio Renascença
PID 1002: RFM
PID 1003: Mega Hits FM

They play with the mpe2aac tool included in the piratfm eti-tools (otherwise used for DAB over sat).

 

[cirio70]

It wasn't easy to lock... i had to play with the MHz but in the end i got it!



And yes, the 3 Portuguese radios plays fine with mpe2aac on my octagon!
229.0.0.1:10001 Renascença
2290.0.2:10002 RFM
229.0.0.3:10003 Mega Hits

 

[Adam792]

These seem to have moved a little again, I've had to nudge my TP frequency up to 12521 (from 12520.4) to get them to lock this morning.

 

[EnoSat]

12519H/SR-718 also changed?

 

[Adam792]

12519H/SR-718 also changed?

No, I'm not sure why that one has been removed from Flysat - it's still there as before.

12519.5H 718 3/4