[pskmail] Comparative tests with THOR22 and PSK250

  • From: Rein Couperus <rein@xxxxxxxxxxxx>
  • To: pskmail@xxxxxxxxxxxxx
  • Date: Mon, 06 Oct 2008 12:46:02 +0200

I have done some testing on 10.148.5 with THOR22. 
The PI4TUE server is now switching to THOR22 on minute 4. I was able to compare
PSK250 with THOR22 on the same channel, a 20 km path. The antenna at the other 
end seems to be  damaged (20 dB down from its normal value).

The method used was to send 3 pings each time and increase the power until no 
ping was 
damaged, and I repeated this scheme for both modes 20 times (yes, that is a lot 
of pings).

PSK250 needed 40 Watts to produce an acceptable number of 3 undamaged pings in 
a row.
THOR22 needed 2 Watts to do the same, a power factor of 20x.

Of course THOR22 took 4x as long, and it needs 2x the bandwidth of PSk250.
The free lunch still does not exist....

But it shows the enormous potential for using THOR22 for pskmail on mediocre  
channels.

73,

Rein PA0R

-- 
http://pa0r.blogspirit.com

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