On 09/01/2017 23:57, Joe Taylor wrote:
> ... so there's no
> way we're going to get accuracies much better than 0.2 (or maybe 0.1)
> Hz. This is by design; since we're using HF-propagated signals, which
> can have Doppler shifts or spreads greater than 0.2 Hz, there is little
> point in doing long
Hi Bill,
On 1/9/2017 5:28 PM, Bill Somerville wrote:
> I have just been looking at a problem with FeqCal when FTol>DF, I have a
> fix for that but I also noticed that, when I connect another WSJT-X
> instance as a tone generator back to back (digital loopback) with an
> instance running FreqCal,
On 09/01/2017 23:23, Steven Franke wrote:
> With 55296 point FFT, a 1600 Hz tone (7.5 sa/period) has 55296/7.5=7372.8
> cycles in a record - so there is an endpoint discontinuity (i.e. a
> discontinuity between the first and last points of the record).
>
> A 1500 Hz tone (8 samples per period) ha
Since Joe is probably eating dinner at the moment…
With 55296 point FFT, a 1600 Hz tone (7.5 sa/period) has 55296/7.5=7372.8
cycles in a record - so there is an endpoint discontinuity (i.e. a
discontinuity between the first and last points of the record).
A 1500 Hz tone (8 samples per period) h
On 09/01/2017 22:28, Bill Somerville wrote:
> ... for sure the three
> magnitudes going into peakup are much flatter when the error is greater ...
Hi Joe,
Here are some examples, these are DFT magnitudes (s vector) for five
bins around a 1500Hz tone:
0.107814305 0.175234795 9.38052
On 09/01/2017 21:45, Joe Taylor wrote:
> ... about FreqCal mode in WSJT-X ...
Hi Joe,
I have just been looking at a problem with FeqCal when FTol>DF, I have a
fix for that but I also noticed that, when I connect another WSJT-X
instance as a tone generator back to back (digital loopback) with an
Hi Joe,
This is great news. I tried to convert the FMT Fortran files to C++, but
failed in an epic way, e. This will be a very welcome addition to
WSJT-X.
Thanks!
Greg.
On 1/9/2017 2:45 PM, Joe Taylor wrote:
> Hi all,
>
> A brief follow-up to my message about FreqCal mode in WSJT-X. Th
With WSJT-X code revision r7467 the tools are in place to allow you to
determine calibration constants (Intercept A and Slope B) for your radio.
Builds using cmake will put the programs fmtave[.exe], fcal[.exe] and
fmeasure[.exe] in the .../install/bin directory along with wsjtx[.exe]
and the
Here's a brief update for those who may not be active on the VHF bands
or otherwise following the development of QRA64 and MSK144.
QRA64A QSOs are being made nightly on 160 m, of all places; and QRA64
activity on 2m EME is becoming significant, especially on weekends.
Last Friday evening I point
On 09/01/2017 13:38, Joe Taylor wrote:
> Thanks for your additions to FreqCal mode committed in r7463. They are
> just about what I had been planning, but you were one step ahead of me!
> Before long I will provide some instructions for using this mode to
> calibrate one's radio.
Hi Joe,
The fre
Hi Bill,
Thanks for your additions to FreqCal mode committed in r7463. They are
just about what I had been planning, but you were one step ahead of me!
Before long I will provide some instructions for using this mode to
calibrate one's radio.
-- Joe, K1JT
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