DigiThin - Pre-production Info

The place for discussion about the RPi add-on RB-TV modulator card developed by G4EWJ and supported by the BATC Shop
g8vpg
Posts: 311
Joined: Fri Oct 11, 2013 9:35 am

Re: DigiThin.

Post by g8vpg » Thu Mar 05, 2015 11:19 am

Brian,
Ian and I have been mulling over the problem of a lack of suitable receivers for very low symbol rate transmissions, which is going to be a barrier to entry for many. I have searched around and looked at what the satellite feed hunters are using. I came across the TBS5925 from http://www.tbsdtv.com . This is a USB connected satellite TV tuner card which the manufacturers specify down to 200ks/s on DVB-S & DVB-S2. There is also a PCI version TBS6925. I wonder has anyone tried one and do the experts think it might be suitable to our use?
Shaun.

G4EWJ
Posts: 711
Joined: Wed Feb 17, 2010 10:11 am

Re: DigiThin.

Post by G4EWJ » Thu Mar 05, 2015 6:11 pm

I haven't tried the TBS units myself. The price is rather high at £150.

Brian

g8gtz
Posts: 1156
Joined: Wed Apr 07, 2010 6:26 pm

Re: DigiThin.

Post by g8gtz » Thu Mar 05, 2015 7:14 pm

There is already a thread running on this topic - see http://www.batc.org.uk/forum/viewtopic.php?f=76&t=3994

Please any replies there and we will close off this one.

73

Noel - G8GTZ

G4KLB
Posts: 207
Joined: Wed May 28, 2008 10:46 am

Re: DigiThin.

Post by G4KLB » Sun Apr 05, 2015 3:36 pm

DigiThin Beta testing continues, working fine on 437MHZ.

Today tests were done on 146.5MHz, 71MHz and 51.2MHz

The test file was received on all frequency's

Lowering the frequency requires less local oscillator drive (Thanks Brian)

Very happy with todays tests. :D
Attachments
145.6 mer 25 s.png
145.6 mer 25 s.png (481.94 KiB) Viewed 3862 times
71MHz 4x3 s.png
71MHz 4x3 s.png (741.71 KiB) Viewed 3862 times
DigiThin 51.2MHz s.jpg
DigiThin 51.2MHz s.jpg (307.84 KiB) Viewed 3862 times

G1LWX
Posts: 49
Joined: Sun Mar 27, 2011 11:10 pm

Re: DigiThin.

Post by G1LWX » Sun Apr 05, 2015 11:32 pm

Good work Colin, finally got the Tuitoune monitor working. Digithin test software now working fine
on 333k symbols on 437mHz.

g8gtz
Posts: 1156
Joined: Wed Apr 07, 2010 6:26 pm

DigitThin shortform kit in BATC shop

Post by g8gtz » Sun May 10, 2015 9:05 pm

The kit of hard to get parts for the RPi add modulator card designed by Brian G4EWJ is now available in the BATC shop.

Please note this item is not a project or complete set of parts - it is the short kit of hard to get parts for the DigiThin project. The kit contains the following:
digithin list.jpg
digithin list.jpg (60.32 KiB) Viewed 3705 times
DigiThin is a DIY project with a degree of difficulty similar to DigiLite and also limited at the moment to very low symbol rates and using the PiCamera – it is not a Digilite / DTX1 replacement.

Further links giving hard ware construction details and schematics will be published by Brian under this topic.

m0nqb
Posts: 1
Joined: Fri Jul 24, 2015 7:43 pm

Re: DigiThin - Pre-production Info

Post by m0nqb » Fri Jul 24, 2015 7:55 pm

Hi Folks,

I note from the last posting on this thread that the construction details were to be published here.

I have just received the Digithin short kit today, thanks to the kind efforts of Noel G8GTZ, as I live locally to him, but at the moment I have no information how to put it together - so can anyone point me to the locations of the circuit diagram, Parts List, and layout or ideally an assembly overlay to show where each component is located w.r.t. the Parts List?

Apologies if it is actually displayed anywhere prominent, as I haven't managed to spot it anywhere

Thanks in advance

Nigel M0NQB

G4EWJ
Posts: 711
Joined: Wed Feb 17, 2010 10:11 am

Re: DigiThin - Pre-production Info

Post by G4EWJ » Sat Jul 25, 2015 1:34 pm

Hi Nigel,

Sorry for the delay. I don't know how I missed this last night. Here are the links to what you need.

You will also need to install the wiringPi utility from the web. http://wiringpi.com/download-and-install/

This is the RPi software that only lets you replay transport stream files rather than use the camera. I must admit to being slightly out of touch with the full software for the camera. Perhaps Noel could comment.

Brian

http://tinyurl.com/DigiThin-Hardware

http://tinyurl.com/DigiThin-dsPIC-Software

http://tinyurl.com/DigiThin-RPi-Software

M0SKM
Posts: 253
Joined: Sun Jul 13, 2014 3:15 pm

Re: DigiThin - Pre-production Info

Post by M0SKM » Sat Jul 25, 2015 5:20 pm

Hi,
This is the version I'm using, no separate wiring file required. Download from Evariste's site.

http://f5oeo.fr/RpiDATV1.2.1.img.zip

73 Steve

G4EWJ
Posts: 711
Joined: Wed Feb 17, 2010 10:11 am

Re: DigiThin - Pre-production Info

Post by G4EWJ » Sat Jul 25, 2015 7:14 pm

Thanks. I'll put a note in the DigiThin links to go for that one.

Brian

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