[pskmail] Re: RSID sensitivity

  • From: Pär Crusefalk <per@xxxxxxxxxxxx>
  • To: pskmail@xxxxxxxxxxxxx
  • Date: Fri, 29 Jan 2010 09:42:12 +0100


This is just excellent.
As RSID is MFSK-like it should follow that MFSK32 should be the best and
your data seems to verify that. OTOH THOR22 was a disappointment.
It would be excellent to redo this test and add more modes, that way we
would have some real data instead of claimed SNR figures. For now I
think its safe to mark the MFSK-modes as suitable for QRP and weak
signal situations in the mode table.

73 de Per, sm0rwo

ons 2010-01-27 klockan 16:48 +0100 skrev Rein Couperus:
> I performed some tests to see how sensitive the RSID decoder is when 
> connecting in a slow mode.  
> method: wait until SM0RWO switches back to PSK500R reduce power  and connect 
> in the test mode, 
> repeat until it does not work anymore... The test path is 1500 km 
> North-South, frequency 10147 kHz, 
> channel clear.  Here are this afternoon's results:  PSK125R: 1 Watt to 
> connect, RSID switching at 500 mW 
> (block incomplete at 500 mW) MFSK32: 500 mW to connect... RSID switched at 
> 200 mW, 
> (block incomplete at 200 mW) THOR22:  2 Watts to connect  (RSID switched at 
> 300 mW, block incomplete at 300 mW).
> This test was around 15:00 UTC, already getting dark in Stockholm...  
> The server timing needs to be tweaked for the slow modes (MFSK16, THOR8),  
> timing is too short at the moment.  
> Also, a connect request in THOR8 takes so long the chance is big the server 
> switches back to PSK500R  
> during the packet...  Generally, to me it looks like the sensitivity is 
> plenty, also for QRP work.  
> 73,  Rein PA0R     -- 
> http://pa0r.blogspirit.com

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