BATC Forum

Hi All

I have just released a new software update for the Portsdown transmitter that includes a lot of minor fixes and some experimental code for controlling a Jetson Nano to do H265 encoding from an LKV373A HDMI input and then transmit it using a LimeSDR.

The change list includes:

• Add DVB-S2 pilots on/off
• Improve DVB-S2 selection labelling
• Add initial code for Jetson control
• Add user-configurable buttons
• Enable update from other GitHub users' repos
• Store user's previous config after upgrade

If transmitting using a DVB-S2 using a LimeSDR, you can now select Pilots on or Pilots off. The use of pilots may improve receive lock times on marginal paths (during the contest?).

Initial details of how to use the Jetson Control code are here: https://wiki.batc.org.uk/Jetson_Nano.

There are 5 User-configurable scripts (which get preserved during software upgrades) which can betriggerd from buttons on the Menu 2, extra functions touchscreen. There are also 2 user-configurable scripts which get called at transmit selection and receive selection.

There are still problems with H264 encoding to the LimeSDR at some SRs and FECs. Evariste and I are still working on sorting this out, but it is not easy! Thanks to F5OEO, G4FRE, GI7UGV and M0DNY for their contributions to the fixes and new features.

Dave, G8GKQ

Dave, thank you and Evariste (and everybody else involved!) for your hard work on this! Absolutely love the Portsdown system.

The SR/FEC issues regarding H264 and LimeSDR-Mini, I am seeing these with the IPTSIN also. Is this something you'd expect at this stage? Just asking as I see IPTSIN wasn't mention in your table in the other posting. FWIW, it seems that anything 333 or higher causes the dropouts in my case.

Thanks

Jonny

Apologies Dave, I didn't see your answer here: viewtopic.php?f=103&t=6118#p19779

Cheers

Jonny

Hi Dave,

I noticed a problem with the update.
During the update, the ".portsdown_gitsrc" file is incremented.

There are several times the name of the depot.

To solve this problem, I added a line "sudo rm /home/pi/.portsdown_gitsrc" before writing this file.

Stephane.

Thanks Stephane

Well spotted! I have just corrected this error in the latest development version, which will be released soon.

Dave, G8GKQ