[Lowfer] Argo performance with low tone frequency?

[jrusgrove at comcast.net]

Paul

Argo sensitivity will be the same at either frequency input. Your receiver 
might have lower audio output at 170 Hz in SSB unless you have passband tuning 
that will shift the passband lower than the standard ~ 300 - 2800 Hz audio 
output.

Sigs down on 2M this morning but you were still Q5. Glad to hear you back on 
the band!

Jay W1VD  WD2XNS  WE2XGR/2



 







----- Original Message -----
From: N1BUG <paul at n1bug.com>
Reply-To: Discussion of the Lowfer \(US, European, & UK\) and MedFer bands 
<lowfer at mailman.qth.net>
To: Discussion of the Lowfer (US, European, & UK) and MedFer bands 
<lowfer at mailman.qth.net>
Sent: 4/8/2017 4:59:02 PM
Subject: [Lowfer] Argo performance with low tone frequency?


Help! Does anyone know if there is any reduction in performance or 
detection sensitivity using Argo for QRSS / DFCW with the signal at 
a low tone, say around 170 Hz?

The last two nights I have been listening for DF2JP on DFCW but I 
was concerned about this. So I set my receiver at 135.000 to get 
1173 Hz tone in Argo. This means I could not monitor WSPR2 at the 
same time. Now I am wondering if it is just as good to leave the 
receiver at 136.000 and run Argo in parallel with WSJT-X for WSPR.

I suppose I lack a real understanding of how the detection works and 
thus don't know if tone frequency has any affect at all on 
sensitivity. I use a SDR so it should be no problem to adjust the 
filter to pass 173 Hz to the decoder. Of course I also have to check 
whether the wider bandwidth upsets WSJT-X...

73
--
Paul
N1BUG 160m-2m DXCC Honor Roll
WI2XTC 2200m-630m Experimental license
FN55mf ME Piscataquis County
http://www.n1bug.com
http://www.aurorasentry.com
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