Ugly Mode

Discussion about this major DATV Project. See https://wiki.batc.org.uk/The_Portsdown_Transmitter
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G8XPZ
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Joined: Sat Oct 07, 2017 5:17 pm

Ugly Mode

Post by G8XPZ » Wed Oct 11, 2017 8:43 am

Hi
New to forum and I can't find an answer to this:-

I am building the Portsdown but before boxing it up would like to test it in ugly mode.

What is the minimum number of modules I need to connect up to test the system? i.e. the RPi + breakout board + LED Screen + ADF4355? is what I am thinking is needed.

Thoughts please?

Thanks
Steve
G8XPZ

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M5TXJ
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Joined: Wed Jul 05, 2017 8:34 pm

Re: Ugly Mode

Post by M5TXJ » Wed Oct 11, 2017 4:18 pm

Absolute minimum would be a Pi with programmed SD card and a network connection to a computer running putty.

73 Dave
...are you sure I can't use a pair of 813's?... :shock:

G8XPZ
Posts: 24
Joined: Sat Oct 07, 2017 5:17 pm

Re: Ugly Mode

Post by G8XPZ » Wed Oct 11, 2017 4:34 pm

Thanks for the reply - Off to program the card . Cheers

g0mjw
Posts: 2568
Joined: Sat Sep 20, 2014 9:15 am

Re: Ugly Mode

Post by g0mjw » Wed Oct 11, 2017 5:48 pm

M5TXJ wrote:Absolute minimum would be a Pi with programmed SD card and a network connection to a computer running putty.

73 Dave
It needs a little more - you have to connect the output pin to the receiver input. You will need a DC blocking capacitor for that - small 10pF ceramic say. I would not attach it to an aerial because you would be radiating out of band.

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M5TXJ
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Re: Ugly Mode

Post by M5TXJ » Wed Oct 11, 2017 5:55 pm

I found my Minitiouner sensitive enough to receive the signal direct from the Pi, the only aerial being a 6" piece of wire in the Minitiouner F socket, nothing on the Pi...
...are you sure I can't use a pair of 813's?... :shock:

G8XPZ
Posts: 24
Joined: Sat Oct 07, 2017 5:17 pm

Re: Ugly Mode

Post by G8XPZ » Wed Oct 11, 2017 7:28 pm

Hi
Thanks all for the help - TX working! I just used my RPI and led and then ran the tx in ugly mode- Received across shack on the minitioune with a small piece of wire. 100% signal!

So now to continue building some more modules.

Regards
Steve
G8XPZ
Nottingham

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