DTX1 with Portsdown software

Help and support for the BATC DTX1 ATV digital encoder and modulator system
Posts: 15
Joined: Sun Dec 06, 2015 10:26 am

DTX1 with Portsdown software

Postby g8lce » Thu Oct 12, 2017 9:29 pm

Hi everyone with a DTX1 and TS Dock. Thanks to the help of G8GKQ (he changed some of the options on his new release of the Portsdown software ) I have the DTX1 working with the Portsdown software.
The software works from the Windows 10 64bit computer using Putty
vMix running on the Windows PC has the external feed pushed to the Raspberry Pi using Video Transport Stream to Portsdown.
Using a touchscreen and the HDMI port can be used (config.txt has to be appended.
There were a few problems but overall the results were good.
1) The DTX1 must be set to preset 3 (you also need the updated firmware post January 2016)
2) The DTX1 will transmit the SR it is set to not the one the Software says - so make sure you match the two. Setting the RPi to 2000kS and the DTX1 to 333kS will TX at 333kS and work but that can cause confusion apart from any other problems.
3)The advanced menu on the DTX1 lets you set the video for the TS Stream 2 to H264 but this does not mean that. The tx is what the RPi is set to.
4)The HDMI touchscreen may not be supported in all modes but this screen here will be https://www.element14.com/community/doc ... en-display according to G8GKQ. However it works for now. You have to add these lines to the end of the config.txt in the RPi root directory:
hdmi_cvt 1024 600 60 6 0 0 0

5)The screen takes power from the RPi usb so when using a EasyCAP dongle and RTL.SDR these need to be via a powered usb hub it would appear.
6) With all the options you will be tempted to try them. When your MiniTioune 0.6d does not decode the video make sure it is in the same mode you are txing. H264 mode will not see Mpeg2 and visa versa!
Some pictures are included showing the setup and rxed pictures.
DSC05284.JPG (225.3 KiB) Viewed 68 times
Capture 08.JPG
Capture 08.JPG (234.46 KiB) Viewed 68 times
Capture 07.JPG
Capture 07.JPG (245.83 KiB) Viewed 68 times

I will be changing to the new screen soon and update then.

Martin G8LCE

Posts: 15
Joined: Sun Dec 06, 2015 10:26 am

Re: DTX1 with Portsdown software

Postby g8lce » Thu Oct 12, 2017 9:32 pm

Some more pictures
DSC05286.JPG (250.05 KiB) Viewed 67 times
DSC05285.JPG (296.23 KiB) Viewed 67 times
DSC05288.JPG (284.69 KiB) Viewed 67 times

Hope this helps

Martin G8LCE

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