Bug fixes to fix occaisional crashes due to even numbers of segments.ģ. Beta version of multi band optimization in OWA Genetic tool, please report any problems.Ģ. Home YagiCAD News New YagiCAD 6.2.7 Changes 6.2.6 to 6.2.7 August 2019ġ.

Readings you make at the shack end of the line will then be the same as if you had made them directly at the antenna. Then reconnect the feedline to the antenna and make measurements over the frequency range of interest. This will move the reference plane of your instrument to the antenna feedpoint, effectively 'calibrating out' the transmission line. As explained inAppendix 1 of the Zplots documentation: The most accurate way to make antenna measurements is to temporarily disconnect the far end of the transmission line from the antenna, place OSL (Open-Short-Load) terminations at the far end, connect the shack end of the line to your instrument, and perform a calibration. For example, if your AutoEZ model has calculated impedance values at the center of a dipole 30 ft in the air then your measurements should be at that same point, not at the lower end of 30 ft of transmission line. To make meaningful comparisons between measured and modeled it is important that you keep in mind the reference plane of your measuring device.

That's not a catastrophe, just revise the formula to replace the undefined names 'LastFreq' and 'NumSteps' with the desired numeric values of 100 and 25. (If you neglect to click on the formula bar or press F2 you will paste both the text characters and the text font, not what you want.) Change 'LastFreq' to 100 and 'NumSteps' to 25, then press Enter.If you press Enter before changing 'LastFreq' and 'NumSteps' the formula will evaluate to the Excel error code '#NAME?' meaning you used an undefined name in the formula. = ROUND(10 ^ (LOG(B$11) + (ROW()-11) * (LOG(LastFreq) - LOG(B$11)) / (NumSteps - 1)), 3) Hint: You can swipe the above line on this web page, press Ctrl-C to copy, return to the Excel window, select cell B12, click on the formula bar to activate it (or just press F2), then press Ctrl-V to paste. Then select cell B12, the second frequency, and enter the following string in the formula bar at the top of the Excel window.

On the Calculate sheet enter '1' as the first frequency in cell B11.

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