ubitx:calibration
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ubitx:calibration [2019/09/20 23:14] f4ija |
ubitx:calibration [2019/09/23 23:04] (current) f4ija |
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| (Please read the whole article of KD8CEC, it's well explained). | (Please read the whole article of KD8CEC, it's well explained). | ||
| - | So, I've tried this this a spreadsheet to make the calculations with the mean frequencies and you will find this in the [[https://www.dropbox.com/sh/537byjdofw8a2mw/AABylslZM-fazlWtRnez65kAa?dl=0|DropBox folder of the whole project]] with the filename Master calibration.ods. | + | So, I've tried this this a spreadsheet to make the calculations with the mean frequencies and you will find this in the [[https://www.dropbox.com/sh/537byjdofw8a2mw/AABylslZM-fazlWtRnez65kAa?dl=0|DropBox folder of the whole project]] with the filename **Master calibration.ods** in the **Tests** folder. |
| It seems to work but the new calculated value is like a range which is getting narrower the more you test. | It seems to work but the new calculated value is like a range which is getting narrower the more you test. | ||
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| However, I think this method is quite simple and easy to measure by the community of WSPR spotters. Another useful thing with WSPR ! | However, I think this method is quite simple and easy to measure by the community of WSPR spotters. Another useful thing with WSPR ! | ||
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| + | ==== Extra tests : electronics heat importance ==== | ||
| + | After the conclusion of the calibration, I wanted to test if the heating of the electronics could have a noticable impact upon the deviation of the frequency. | ||
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| + | So, I've tested my Ubitx with a WSPR spotting just after a cold boot (after at least one day without turning it on) and after a while, at least 30 minutes. | ||
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| + | The results are in the Test folder, with the name **WSPR deviation heating up.ods.** | ||
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| + | After a cold start : | ||
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| + | {{ :ubitx:heatdeviation1.png |}} | ||
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| + | After at least 30 minutes, without changing everything else : | ||
| + | |||
| + | {{ :ubitx:heatdeviation2.png |}} | ||
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| + | The result is much better !! | ||
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| + | Let's try after more than one hour : | ||
| + | |||
| + | {{ :ubitx:heatdeviation3.png |}} | ||
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| + | OK, it's not better. Maybe there is not enough values to validate the results but it seems that there no improvements after 35 minutes. | ||
| + | |||
| + | The point is that you need after all to wait before making some calibration to be sure to have right values and not fluctuing measures. | ||
| ===== Calibrating the BFO ===== | ===== Calibrating the BFO ===== | ||
ubitx/calibration.1569014064.txt.gz ยท Last modified: 2019/09/20 23:14 by f4ija
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