Comments on: SBS1 Utilities

By: Bob

Bob — Thu, 13 May 2010 12:42:47 +0000

Piotr
I’m using sbs1xxx for a few days now as multiplexer and BS decoder. After a number of hours or even days, sbs1xxx becomes dead. No more output on both the multiplexer and the socket server. I run sbs1xxx in the background using
> /dev/null & at the end of the command line.
Is there a way to debug what happens?

By: Piotr Pawluczuk

Piotr Pawluczuk — Wed, 28 Apr 2010 09:48:22 +0000

The problem is WordPress replaces double “-” with one longer “–” when not using [code]code[/code] tag :/

By: Bob

Bob — Wed, 28 Apr 2010 09:45:20 +0000

Thank you for your answer.
Due to lack of docs I spent a lot of time to found out that you have a typo in your BS30003 example (-ot tcp30003 instead of –ot tcp30003, both look common in Unix environments).
In fact I tested the multiplexer with 5 PCs connecting from Basestation Software and it works. Badly the decoded output allows only one connection :-(( . This would be really nice.

In the hope it may help others, here’s a working example commandline:

sbs1xxx —sbs1ip 192.168.1.170:10001 –ot tcp30003 –ss –ssp 30003 –multiplexer 20072

(no line breaks here)

Explanation:
–sbs1ip = IP-address and port of SBS-1 box (192.168.1.170:10001)
–ot tcp30003 = BaseStation compatible output
–ss = enable socket-server, decoded output as from BaseStation software, only one connection allowed
–ssp = socket-server port (30003)
–multiplexer 20072 = port to connect with BaseStation software (Settings->Hardware Settings->Network (IP-adress from multiplexer and Port 20072), multiple connections allowed

By: Piotr Pawluczuk

Piotr Pawluczuk — Wed, 28 Apr 2010 07:09:55 +0000

Hello Bob,

The multiplexer can handle more than two connections at once, but the socket server ( decoded output ) can only accept one connection. This might change in future, but for now it is this way.

By: Bob

Bob — Tue, 27 Apr 2010 21:59:25 +0000

Hi Piotr,
is it true that the multiplexer can supply only two connections and the socketserver allows only one connection. The Basestation Software allows multiple connections at once.

By: Helge

Helge — Fri, 12 Feb 2010 11:49:45 +0000

Thank you, so the “–ot hex” is really everything that is coming from the receiver.

By: Piotr

Piotr — Fri, 12 Feb 2010 10:41:24 +0000

Unfortunately the only way to do that would be to modify the FPGA firmware which is not something I am going to play with. Especially when you can build your own non-restricted receiver for about $50.

By: Helge

Helge — Fri, 12 Feb 2010 10:39:30 +0000

Hi Piotr,
when I have a look into the hex output I can see the DF04, DF05, DF11, DF17, DF20 and DF21. Do you know if it is also possible to get the DF00 and DF16 from the SBS1?

Best regards
Helge.

By: Piotr

Piotr — Sun, 07 Feb 2010 17:00:36 +0000

Thanks, I have replied to you by email. I can’t tell at this point whether it’s the 0deg crossing issue or not. The algorithm itself was written according to ICAO docs, I believe they have taken that into account, but I must have left a bug. Waiting for a recording now :)

Piotr

By: Colin

Colin — Sun, 07 Feb 2010 16:24:22 +0000

@Piotr

Piotr

Okay – as soon as I have an email address for you I will attach some –record output.

BTW – I’m located in NW. England so would expect to see longitudes perhaps from 1Deg East to 4Deg West. Perhaps getting contacts on “both” sides of 0Deg meridian is the issue?

Colin