Improving the LimeSDR Performance with Portsdown Buster

Discussion about this major DATV Project. See https://wiki.batc.org.uk/The_Portsdown_Transmitter
G8KOE
Posts: 178
Joined: Fri Aug 09, 2019 8:14 am

Re: Improving the LimeSDR Performance with Portsdown Buster

Post by G8KOE » Wed Feb 26, 2020 10:45 am

Hi Dave,
Been testing C920 Webcam.
Settings S2QPSK H264 Lime DVB Audio Webcam.
Pictures good sound tends to stutter as light gets poor and camera working harder.
Using MiniTioune and VLS media player.
VLC usually has the edge.
My station is in dark corner of lounge have invested in variable light source which helps.
Hope the information helps the development of Buster.

Keep up the good work
Martin
G8KOE

G8GKQ
Site Admin
Posts: 2810
Joined: Sun Mar 22, 2009 1:21 pm

Re: Improving the LimeSDR Performance with Portsdown Buster

Post by G8GKQ » Fri Feb 28, 2020 9:01 pm

I have just released an update to the Portsdown Buster Software 202002290. The new features are:
  • New IPTS Viewer
  • Reduce frame rate for C920
  • Lime Carrier Mode restored
The IPTS viewer (on Menu 2) will display an H264 (not H265) IP transport stream sent to the Portsdown on Port 10000. This is to enable fault-finding for those using external video encoders (such as the Jetson or PCs with vMix or OBS). There are more details about this on the Wiki https://wiki.batc.org.uk/IPTS_Input_to_ ... he_LimeSDR

The C920 frame rate has been reduced slightly to improve the encoding reliability.

The carrier mode is now available (from the modulation menu) for the LimeSDR in both stock and DVB firmware modes.

You can update from Menu 3 in the normal way. Note that this update is not available to those using the older Portsdown Stretch software.

Dave, G8GKQ

g0mjw
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Joined: Sat Sep 20, 2014 9:15 am

Re: Improving the LimeSDR Performance with Portsdown Buster

Post by g0mjw » Fri Feb 28, 2020 9:09 pm

is it time to update the LimeNetMicro?

G8GKQ
Site Admin
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Joined: Sun Mar 22, 2009 1:21 pm

Re: Improving the LimeSDR Performance with Portsdown Buster

Post by G8GKQ » Fri Feb 28, 2020 9:17 pm

LimeNET Micro? Not yet....

G8KOE
Posts: 178
Joined: Fri Aug 09, 2019 8:14 am

Re: Improving the LimeSDR Performance with Portsdown Buster

Post by G8KOE » Tue Mar 10, 2020 9:24 am

Hi,
If you haven't updated to the Buster image would recommend you do.
All my operation is on QO-100 with Portsdown and Lime mini.
The Buster image and the new firmware for Lime mini has made a stable system.
I have been testing with Sym Rate 66, 8PSK, H264, FEC 3/4.
Using Test Card Pi Cam & C920 webcam and getting good results.
Dave is constantly making improvement so a big thank you to him!
Lots more to test on the Buster image to find what works me.

73's
Martin
G8KOE

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