DATV-Express Project

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G4GUO
Posts: 629
Joined: Tue Feb 16, 2010 12:51 pm

Re: DATV-Express Project

Post by G4GUO » Fri Dec 21, 2018 5:54 pm

I just tried the latest version of DATV-Express with Lime-SDR USB and get a clean 40 dB MER @ 2 MS/s.

- Charles

f4fdw
Posts: 9
Joined: Sat Mar 21, 2015 11:18 am

Re: DATV-Express Project

Post by f4fdw » Sun Dec 23, 2018 4:41 pm

Hi Charles and all
Is it possible to make a linux version of DATV express or to adapt an old linux version to Pluto and Lime
thank you in advance
73
f4fdw laurent

radiogareth
Posts: 355
Joined: Wed Jan 06, 2016 9:46 am

Re: DATV-Express Project

Post by radiogareth » Sun Dec 23, 2018 4:47 pm

Thanks for testing Charles. I'm puzzled to say the least, but a bit frazzled so I'll leave it over the christmas break and come back fresh(er).

73

Gareth

G4GUO
Posts: 629
Joined: Tue Feb 16, 2010 12:51 pm

Re: DATV-Express Project

Post by G4GUO » Sun Dec 23, 2018 10:14 pm

Hello Laurent,

Nothing planned for Linux at the moment.

- Charles
f4fdw wrote:
Sun Dec 23, 2018 4:41 pm
Hi Charles and all
Is it possible to make a linux version of DATV express or to adapt an old linux version to Pluto and Lime
thank you in advance
73
f4fdw laurent

KenW6HHC
Posts: 302
Joined: Mon Jun 01, 2009 4:20 pm

Re: DATV-Express Project

Post by KenW6HHC » Thu Jan 03, 2019 6:20 pm

Art WA8RMC reports that sales of MiniTiouner-Express, the DVB-S/DVB-S2 receiver/analyzer, continue to be brisk during December. Most sales were for distribution to EU customers. Units can be ordered by PayPal from the www.DATV-Express.com web site on the PURCHASE A PRODUCT link. The MiniTioune software for Windows (currently version v0.8s) from Jean-Pierre F6DZP can be downloaded free from http://www.vivadatv.org/viewtopic.php?f=60&t=521
Remember that you must first REGISTER/SIGN-IN to the DATV-Express web site in order to make a purchase.
The price for the MiniTiouner-Express fully tested unit is US$75 + shipping.
Shipping charge within USA is US$7.00
Shipping charge to EU is US$24.00 (including the VAT)
Shipping charge to other international countries is US$35.00


Charles G4GUO released an upgraded v1.25LP12 version of DATV-Express software that is compatible with the latest firmware from Lime MicroSystems. The Windows set-up.exe file and the NOTES file are now available at www.DATV-Express.com on the DOWNLOADS page. Many thanks to G4GUO for his efforts.

Ken W6HHC released an updated Express_DVB_Transmitter User Guide (Draft14) to emphasize that v1.25LP12 software for Windows has transitioned to cover four transmitter boards:
DATV-Express board
LimeSDR-USB (larger) board
LimeSDR-mini board
PLUTO-ADLM board
This User Guide available at www.DATV-Express.com on the DOWNLOADS page.
Ken is currently working on revising the MiniTiouner-Express User Guide to include the new power supply options available with the addition of J3 in RevB version of the MiniTiouner-Express unit.

Image
Draft 14 of DATV-Express Software User Guide has been revised to cover the ability to be used with four different hardware exciter boards.


Charles G4GUO has now received first-article blank PCBs from China for a 250-watt 2.4 GHz power amplifier design that he plans to use for uplink on the Es'hail-2 DATV satellite. He is just waiting for the heatsinks he purchased in order to begin testing the new PA. Also, he has just ordered a 1.8 meter dish antenna for his home Es'hail-2 station. He plans to use dual band feeds to provide both uplink and downlink functions.

Project Speed is set to slow….de Ken W6HHC
Last edited by KenW6HHC on Fri Jan 04, 2019 6:24 pm, edited 2 times in total.

G4GUO
Posts: 629
Joined: Tue Feb 16, 2010 12:51 pm

Re: DATV-Express Project

Post by G4GUO » Fri Jan 04, 2019 8:23 am

I have yet again completely sold out of EU stock so it will be 3 weeks before I get any more.

- Charles

F1CJN_alain
Posts: 54
Joined: Thu Jul 21, 2011 9:50 am

Re: DATV-Express Project

Post by F1CJN_alain » Fri Jan 25, 2019 3:48 pm

1.25.P12 is running fine

I have tested the F6DZP recommendation to use the PLUTO at 3457 MHz, then to send the signal to an SMA to guide transition.
I receive the H3 harmonic at 10371 MHz with a standard PLL LNB (OL 9750MHz) and the Minitiouner Pro tuned at 621 MHz.
Thanks to Jean-Pierre
Image : on the scope the IF 621 MHz DATV signal from the LNB.
73's
Alain F1CJN
Image
Last edited by F1CJN_alain on Sun Jan 27, 2019 5:53 pm, edited 1 time in total.

User avatar
i2NDT
Posts: 53
Joined: Thu Nov 12, 2015 9:26 pm

Re: DATV-Express Project

Post by i2NDT » Sun Jan 27, 2019 11:15 am

Hi,
I have a couple of questions...
I am using DATV-Express 1.25lp12 on my dual core Win7 laptop and a Logitech QuickCam Pro 5000.
I connected a LimeSDR mini and was able to succesfully transmit DVB-S, H.262 down to 187 KS/s. decreasing the rate I get a runtime error.

the first question is:
- is 187 KS/s the limit of the software or the culprit is my PC?

second question:
- how can I transmit a video clip instead of the TS from the webcam?

thanks!

i2NDT Claudio
i2NDT Claudio
Dalmine, Italia

G4GUO
Posts: 629
Joined: Tue Feb 16, 2010 12:51 pm

Re: DATV-Express Project

Post by G4GUO » Sun Jan 27, 2019 11:44 am

At low bitrates the H.262 encoder crashes that is what you are probably seeing. Try H.264

The only way to transmit a loop or pre-recorded video is to use vMix as an input to Express.
You can then use all vMix's features. The basic version of vMix is free but only supports SD (Standard Definition).

- Charles

User avatar
i2NDT
Posts: 53
Joined: Thu Nov 12, 2015 9:26 pm

Re: DATV-Express Project

Post by i2NDT » Sun Jan 27, 2019 12:06 pm

thanks Charles!

Claudio
i2NDT Claudio
Dalmine, Italia

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