Hi Pf,
Most tone modes operate at an offset from carrier frequency, so that
the audio frequencies of interest are more or less cenetered in the
filter passband. I believe the JTx modes are already in the 1200 to
1500 Hz range so no offset is required.
The crystal filter being used only
Matt == Matt Zilmer mzil...@roadrunner.com writes:
Matt Hi Pf,
Matt Most tone modes operate at an offset from carrier frequency, so that
Matt the audio frequencies of interest are more or less cenetered in the
Matt filter passband. I believe the JTx modes are already in the
Hello,
I'm dabbling with wsjtx, and I see that my rx audio has some definite roll
off at 300 Hz and 3500 Hz. Selected filter is the 12 kHz one, and
width is set to 4 kHz. Audio soundcard is the Numark studio-io, but I
also saw this with an el-cheapo adapter.
Also, I see the same roll-off in
Hi Guys,
As an active WSJT-mode user, I'll attempt to clarify this set of issues.
For a more complete answer, download the WSJT 10 and WSJT-X pdf documents.
WSJT 10 and WSJT-X are designed for the rig to be set for the full USB
bandwidth of an average radio. Each mode has an agreed upon
Yes, and that was what I wanted to know. I've read in this mailing
list that the DSP limits the audio at 4 kHz. I'm seeing it roll off
at little above 3400. The low end rolls off at around 300, so I'm
getting an audio passband of ~3100 Hz. I wonder if this is normal, or
if there's something
Joe == Joe Subich, W4TV li...@subich.com writes:
Joe It depends on your roofing filter ... If you have an AM (6 KHz) or
Joe FM (13 KHz) filter, you will see 300 Hz to 4200 Hz with FC=2.20 and
Joe BW=4.00 (at -3dB). If you only have a 2.8 KHz filter, bandwidth
Joe will be around
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