Thanks Joe,
I think some of the variance maybe due to the CW keying periods where
samples may have been gathered when there are CW keying artefacts
occurring, the radio had been on for 48 Hrs when these measurements were
made and has a 'heated crystal' for its reference (Icom CR64 reference
module).
I will try the method using the utility program you made mention of in the
other posting, I only hope I can make a set of instructions that are clear
enough for the others here in VK that are on 144 & 432 WSPR as I am chasing
this really for them as I already have a GPS locked rig in use on WSPR. My
example with my aging 275H was to see if it could be solved on a typical
older rig.
Regards,
Peter Sumner
On Thu, May 3, 2018 at 3:37 AM, Joe Taylor <[email protected]> wrote:
> Hi Peter,
>
> For completeness, this message is an addendum to the one sent a few
> minutes ago.
>
> You asked whether the variance in measured frequency offsets might be too
> high. As you point out, it goes from -126 to -131 Hz across the 30 second
> period.
>
> In your file fmt.all the variation appears to be nearly monotonic,
> drifting upward from roughly -131 to -126 Hz over the 30 s interval. If
> your radio was already warmed up, I'd guess that this change was a result
> of propagation effects rather than any drift in the radio.
>
> For reliable calibration of your radio you should try to make sure that
> the measured offset stays close to -129 Hz over long periods of time --
> hours, even. Let the calibration procedure run for a while, and then
> examine the data in fmt.all.
>
> -- 73, Joe, K1JT
>
> On 5/1/2018 9:12 PM, Peter Sumner wrote:
>
>> Hello,
>> following suggestions from others on this list I have tried to use
>> freqcal from WSJT-X 1.9.0-rc3 on a single GPS locked VHF beacon.
>>
>> This beacon on 144.450 (VK5VF) runs a mixture of carrier and CW ID (on
>> off keying). Each time I run the process that is outlined in the
>> documentation when I select the "solve for calibration" I end up with the
>> quite unhelpful error telling me: "Calibration error Check fmt.all for
>> possible bad data" so I dutifully look in this file to try and identify
>> what is wrong (sample below)
>>
>> 21:34:34 144450 1 1500 1368.324 -131.676 14.5 39.8
>> 21:34:36 144450 1 1500 1369.671 -130.329 14.9 38.5
>> 21:34:39 144450 1 1500 1369.555 -130.445 14.8 40.1
>> 21:34:41 144450 1 1500 1368.284 -131.716 17.2 34.2
>> 21:34:44 144450 1 1500 1368.318 -131.682 16.5 36.1
>> 21:35:34 144450 1 1500 1369.171 -130.829 15.9 38.1
>> 21:35:36 144450 1 1500 1369.574 -130.426 14.9 39.5
>> 21:35:39 144450 1 1500 1369.270 -130.730 15.8 36.2
>> 21:35:41 144450 1 1500 1370.659 -129.341 15.4 36.1
>> 21:35:43 144450 1 1500 1372.416 -127.584 14.9 38.3
>> 21:35:49 144450 1 1500 1371.663 -128.337 14.8 39.2
>> 21:36:19 144450 1 1500 1373.065 -126.935 14.7 41.5
>> 21:36:21 144450 1 1500 1372.527 -127.473 15.7 35.2
>> 21:36:24 144450 1 1500 1372.356 -127.644 19.3 28.5
>> 21:36:26 144450 1 1500 1372.464 -127.536 20.3 26.5
>> 21:36:28 144450 1 1500 1372.826 -127.174 19.7 28.8
>> 21:36:34 144450 1 1500 1370.782 -129.218 14.8 40.4
>> 21:36:36 144450 1 1500 1370.859 -129.141 14.9 38.2
>> 21:36:39 144450 1 1500 1371.701 -128.299 14.7 41.4
>> 21:36:41 144450 1 1500 1371.060 -128.940 16.1 37.6
>> 21:36:43 144450 1 1500 1371.607 -128.393 14.8 39.4
>> 21:36:49 144450 1 1500 1373.245 -126.755 14.8 38.1
>>
>> Can any of the list members help me identify which of these lines of data
>> would be in error? Is the variance in offset too high as it goes from,
>> -126 to -131 Hz across the 30 second period, When I try a smaller sample I
>> get the error telling me there is not enough information in the file, so
>> that did not help,
>>
>> Regards,
>> Peter, vk5pj
>>
>>
>> ------------------------------------------------------------
>> ------------------
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>>
>>
>>
>> _______________________________________________
>> wsjt-devel mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/wsjt-devel
>>
>>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> wsjt-devel mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/wsjt-devel
>
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
wsjt-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/wsjt-devel
