Ugly mode possible on other frequencies?

Discussion about this major DATV Project. See https://wiki.batc.org.uk/The_Portsdown_Transmitter
Post Reply
G8PEF
Posts: 176
Joined: Mon Oct 30, 2017 6:42 pm

Ugly mode possible on other frequencies?

Post by G8PEF » Wed Feb 28, 2018 7:15 am

Hi, all

Is the RPi software capable of generating an ugly mode signal on 146 MHz? (Or any other frequency lower than 437 MHz, for the matter).

I'm wondering if it's possible to generate a 125ks ugly morse signal on '2m' for the purposes of a demo with a Minitiouner.

If it's not possible, what is it that imposes the limitation to 437 MHz only?

73
John
Last edited by G8PEF on Thu Mar 01, 2018 7:16 am, edited 1 time in total.

G8GKQ
Site Admin
Posts: 2798
Joined: Sun Mar 22, 2009 1:21 pm

Re: Ugly mode possible on other frequencies?

Post by G8GKQ » Wed Feb 28, 2018 1:43 pm

Hi John

Yes, ugly mode works at 146 MHz. I did some tests a while ago, and it worked up to nearly 900 MHz. Not sure of the lower limit, but I have used it at 146 MHz.

Morse? RPiTX might be better suited to that: https://github.com/F5OEO/rpitx

Dave

f5oeo
Posts: 70
Joined: Mon Mar 10, 2014 5:46 pm

Re: Ugly mode possible on other frequencies?

Post by f5oeo » Fri Mar 02, 2018 11:39 am

I am currently rewriting rpitx to handle higher range of frequencies and better precision. Upper limit is now 1.5GHZ, down limit should be around 5Khz.
Hope to have this new version available soon.

73's Evariste F5OEO
Attachments
rpitx1.5.jpg
rpitx1.5.jpg (95.87 KiB) Viewed 2464 times

G8PEF
Posts: 176
Joined: Mon Oct 30, 2017 6:42 pm

Re: Ugly mode possible on other frequencies?

Post by G8PEF » Sat Mar 03, 2018 12:59 am

G8GKQ wrote:
Wed Feb 28, 2018 1:43 pm

Yes, ugly mode works at 146 MHz.

...

Morse? RPiTX might be better suited to that: https://github.com/F5OEO/rpitx
Haha - autocorrect strikes again … That should, of course have said 'ugly mode', not 'ugly morse'.

John

vk3gmz
Posts: 17
Joined: Fri Apr 06, 2018 4:51 am

Re: Ugly mode possible on other frequencies?

Post by vk3gmz » Thu Apr 12, 2018 8:35 am

Are there any tricks to getting the ugly mode to work.. ?
I would love 1255 3500 3/4 if posdible, running the later update of stretch.

Cheers
Phil.

Post Reply

Return to “The Portsdown Digital ATV System”