QSY Button in fldigi

[ki4tjy-/[e-mail] [linuxham]]

I use flrig and fldigi all the time and I noticed that the QSY button does not react as the documentation states.


HELP FILE:The QSY button is very specific to rigs interfaced with either hamlib or the memory mapped i/o. Each rig has a sweet spot associated with its bandwidth controller. For the Argonaut V this is 1100 Hz. For the the Kachina it is 1000 Hz. As the transceivers bandwidth is changed the changes occur centered at this frequency. So .... let's say that I just started copying a rare dx at 1758 Hz and I wanted to put the signal at the sweet spot so I could easily narrow the receiver bandwidth. Click on the signal on the waterfall. Let the AFC capture and then press the QSY button. The tranceiver frequency will be shifted and the fldigi audio tracking point shifted in unison such that the signal is now at the receivers sweet spot. Very fast and very convenient! If you do not have hamlib enabled for your transceiver this button will be dimmed and not activated.


I use flrig for rig control and I do not have hamlib selected in fldigi and the QSY button is not grey'd out. This conflicts with the documentation. When QSY is pushed it actually moves the operating frequency. If inadvertently hit it takes a second or two to figure out what happened.


Not really sure how to determine the sweet spot for an IC-756ProIII anyway.

['Mike Miller' lists-2PxNX0V3za/[e-mail] [linuxham]]

Okay, I'm sure you will get expert help, but for now under
configure>waterfall controls; there is a check box for QSY among
others. I don't know if this actually works, I'm looking at the
Windows port and only have QSY checked, but have other controls
enabled. Could be that settings window doesn't function or just
doesn't reflect the defaults.

As to how to determine your sweet spot, select the narrowest
filter you will use on the 756 ProIII and look at your waterfall
and see where the center of passband falls. On my TS-2000 in SSB
mode I can do a 1000 lo cut and a 1400 hi cut so 1200 would be
the sweet spot. If I engage the packet filters then it might be
1000.

Since most of the time the soundcard modem DSP will do the job,
you might want to set the sweet spot to a frequency that the
second harmonic of the soundcard audio will be outside the
transceiver's audio bandpass. That may be outdated or just myth,
but that was one of the things that used to be mentioned in psk
setup info.

I haven't migrated to linux yet, got side tracked by Field Day
and for my day to day activities it is easier to run Windows.
Guess that is a disadvantage of dual boot, I don't have to sink
or swim.

73
Mike kc9doa

Post by ki4tjy-/***@public.gmane.org [linuxham]
I use flrig and fldigi all the time and I noticed that the QSY
button does not react as the documentation states.
HELP FILE:The QSY button is very specific to rigs interfaced
with either hamlib or the memory mapped i/o. Each rig has a
sweet spot associated with its bandwidth controller. For the
Argonaut V this is 1100 Hz. For the the Kachina it is 1000 Hz.
As the transceivers bandwidth is changed the changes occur
centered at this frequency. So .... let's say that I just
started copying a rare dx at 1758 Hz and I wanted to put the
signal at the sweet spot so I could easily narrow the receiver
bandwidth. Click on the signal on the waterfall. Let the AFC
capture and then press the QSY button. The tranceiver
frequency will be shifted and the fldigi audio tracking point
shifted in unison such that the signal is now at the receivers
sweet spot. Very fast and very convenient! If you do not have
hamlib enabled for your transceiver this button will be dimmed
and not activated.
I use flrig for rig control and I do not have hamlib selected
in fldigi and the QSY button is not grey'd out. This conflicts
with the documentation. When QSY is pushed it actually moves
the operating frequency. If inadvertently hit it takes a
second or two to figure out what happened.
Not really sure how to determine the sweet spot for an
IC-756ProIII anyway.

------------------------------------
Posted by: "Mike Miller" <lists-2PxNX0V3za/QT0dZR+***@public.gmane.org>
------------------------------------

[[e-mail] [linuxham]]

If you control the radio serially then set the sweet spot to the radio data filter center. With wide radio filter, initially, you can click on a waterfall signal and start decode. If a strong nearby signal shows up and affects your reception of the station you are working, you need to employ your radio filters. Instead of trying to retune the radio, hit or miss, to place your qso in the center of your radio data filter, you only have to click qsy. This retunes your radio to place your waterfall qso at the sweet spot, or center of your data filter, and then adjust the radio to narrow the filter, viola, qrm reduced.