<p dir="ltr">I've never used Direwolf! I'm a hardware modem guy! and yeah I'm happy living in the past! 😉 </p>
<br><div class="gmail_quote"><div dir="ltr">On Mon., 4 Dec. 2017, 11:32 Glen English VK1XX, <<a href="mailto:glenlist@pacificmedia.com.au">glenlist@pacificmedia.com.au</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">And TX level shouldnt matter much at all unless you savagely overdrive it<br>
<br>
there is only one tone there at a time.<br>
<br>
so there is no IMD<br>
<br>
and since the tones are up at 1600 Hz, the harmonics will be outside the<br>
SSB filter....at least 20dB down.<br>
<br>
On an all-digital radio, overdriving may causing aliasing distortion,<br>
(which would put sh1t everywhere) if the input of the ADC was heavily<br>
clipped.... that's about all.<br>
<br>
I would like to see a mod in Direwolf though that ramped up the tone<br>
level over a few mS as not to hit the ALC hard, often overshooting.<br>
<br>
g<br>
<br>
<br>
<br>
On 4/12/2017 10:45 AM, Scott Evans wrote:<br>
><br>
> Yes I have S9 noise here too but I'm using a vertical so noisy bands<br>
> kinda comes with the territory! 😉<br>
><br>
><br>
> On Mon., 4 Dec. 2017, 09:50 Gavin Rogers,<br>
> <<a href="mailto:grogers@vk6hgr.echidna.id.au" target="_blank">grogers@vk6hgr.echidna.id.au</a> <mailto:<a href="mailto:grogers@vk6hgr.echidna.id.au" target="_blank">grogers@vk6hgr.echidna.id.au</a>>><br>
> wrote:<br>
><br>
> I'd say mine. I'm using the incredibly technical interface of<br>
> using an audio cable from the headphone jack to the sound card :)<br>
><br>
> The antenna is a long wire, although resonant on 40m, I suffer<br>
> from S7-9 noise on all bands at all times (suburban areas, woo<br>
> hoo!) , hence my limited HF experience.<br>
><br>
><br>
><br>
> On 4 December 2017 6:41:11 am AWST, Scott Evans <<a href="mailto:vk7hse@gmail.com" target="_blank">vk7hse@gmail.com</a><br>
> <mailto:<a href="mailto:vk7hse@gmail.com" target="_blank">vk7hse@gmail.com</a>>> wrote:<br>
><br>
> Hi Gavin,<br>
><br>
> Curious, but the mention of the audio level being too high, is<br>
> that saying that mine is or yours? 🤔<br>
><br>
><br>
> On Mon., 4 Dec. 2017, 09:25 Gavin Rogers,<br>
> <<a href="mailto:grogers@vk6hgr.echidna.id.au" target="_blank">grogers@vk6hgr.echidna.id.au</a><br>
> <mailto:<a href="mailto:grogers@vk6hgr.echidna.id.au" target="_blank">grogers@vk6hgr.echidna.id.au</a>>> wrote:<br>
><br>
> Captured a handful of frames last night here in Perth on<br>
> 40m. I guess it<br>
> works! Also is my first 40m digital RX, so that's nice :)<br>
><br>
> VK7HSE-4 audio level = 139(11/14) [NONE] __||___<br>
> Audio input level is too high. Reduce so most stations<br>
> are around 50.<br>
> [0.2] VK7HSE-4>APRX29,WIDE2-1:!4259.56SI14718.64E#RasPi<br>
> iGate & Digi<br>
> Position, OVERLAY DIGI (green star) w/overlay I, >40 APRSmax<br>
> S 42 59.5600, E 147 18.6400<br>
> RasPi iGate & Digi<br>
><br>
> VK7HSE-4 audio level = 158(11/19) [SINGLE] __::___<br>
> Audio input level is too high. Reduce so most stations<br>
> are around 50.<br>
> [0.2] VK7HSE-4>APRX29,WIDE2-1:!4259.56SI14718.64E#RasPi<br>
> iGate & Digi<br>
> Position, OVERLAY DIGI (green star) w/overlay I, >40 APRSmax<br>
> S 42 59.5600, E 147 18.6400<br>
> RasPi iGate & Digi<br>
><br>
><br>
><br>
> 73<br>
> Gavin<br>
> VK6HGR<br>
><br>
> On 3/12/2017 4:00 PM, Gavin Rogers wrote:<br>
> > On 3/12/2017 3:56 PM, Josh wrote:<br>
> >> Thanks Gerard.<br>
> >><br>
> >> I had a minor issue with direwolf using the wrong tones<br>
> earlier, it<br>
> >> appears that<br>
> >> the config line "MODEM 300" will cause 1600 & 1800<br>
> tones to be used but<br>
> >> "MODEM 300 # [comment]" causes 1200 & 1800 Hz tones.<br>
> > Try using<br>
> > MODEM 300 7@30<br>
> ><br>
> > This will set up a number of modem frequency groups<br>
> that'll help with<br>
> > (mis)tuning:<br>
> ><br>
> > Channel 0: 300 baud, AFSK 1600 & 1800 Hz, D, 48000<br>
> sample rate<br>
> > 0.0: D 1510 & 1710<br>
> > 0.1: D 1540 & 1740<br>
> > 0.2: D 1570 & 1770<br>
> > 0.3: D 1600 & 1800<br>
> > 0.4: D 1630 & 1830<br>
> > 0.5: D 1660 & 1860<br>
> > 0.6: D 1690 & 1890<br>
> ><br>
> > Fairly unlikely I'll get anything here on Perth on 40m<br>
> on packet with<br>
> > my antenna but I'm curious on the performance of<br>
> Direwolf on HF so<br>
> > I'll have my station listening for a few days.<br>
> ><br>
> > 73<br>
> > Gavin<br>
> > VK6HGR<br>
> ><br>
><br>
> --<br>
><br>
> Gavin Rogers | Amateur radio<br>
> station VK6HGR<br>
> <a href="http://www.livingwaters.com/good" rel="noreferrer" target="_blank">http://www.livingwaters.com/good</a> | <a href="http://vk6hgr.ampr.org/" rel="noreferrer" target="_blank">http://vk6hgr.ampr.org/</a><br>
> MSN/Skype/Email:<br>
> <a href="mailto:grogers@vk6hgr.echidna.id.au" target="_blank">grogers@vk6hgr.echidna.id.au</a><br>
> <mailto:<a href="mailto:grogers@vk6hgr.echidna.id.au" target="_blank">grogers@vk6hgr.echidna.id.au</a>><br>
><br>
> _______________________________________________<br>
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> --<br>
> Gavin Rogers mobile<br>
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</blockquote></div>