I am not JTDX user but happened just give help to one ham who uses it.
That guy was wondering why he sees just some decoded stations even when
waterfall seems to be full of them.
It seems to be that JTDX has some kind of internal filter that decodes
just a part of whole audio band. I do not know how this filter reacts
during qso if opponent station jumps very far from CQ-callers frequency.
At least during monitoring it drops away decodes outside filter area.
This could be one reason.
Another is rig's filters. Usually older rigs go just a bit over 2500Hz
where the latest ones go happy to near 4000Hz.
JTDX filter, old rigs or too narrow rig filters in use are the reasons
that may drive stations to same small area of used audio band.
--
Saku
OH1KH
Jim Brown kirjoitti 8.7.2021 klo 22.23:
On 7/8/2021 12:02 PM, Jon Anhold wrote:
There are absolutely guys running narrow filters where you have to
get very close to them, or even right ON their frequency for them to
hear you. Apparently they have no idea what they are missing.
Not only missing callers, but also degrading the decoding process, as
a result of the phase shift in those filters. Joe has made it clear in
the User Guide that RX bandwidth should be wide, to minimize this effect.
But many fail to study the User Guide, nor Release Notes, nor Quick
Start Guides.
73, Jim K9YC
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