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I've searched the messages, and could not find an answer to my question, so here goes:? In the VNWA program, under settings, Calibration Kit, the dialogue box for the Simple SOLT Model Settings, has this text in blue letters: "The delays above are correction values, i.e., the negative of the negative of the delays of the standard."? ? ?

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Does that mean that from the calibration data that came with my calibration kit, which has all negative numbers, I enter them into the dialogue box as positive numbers?? For example, the paper shows the male load delay as -246.74 ps.? Do I enter that into the software as +246.74?? Thanks in advance for any guidance.? Tom

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Thomas,

this is more a question to the designer of VNWA about his implementation (DG8SAQ). Please note that sdr-kits provides a download link (on the small paper of the kit) to a calibration value file for your specific BNC-Cal-Kit. If you load that fle in VNWA, the values will have the correct signs. The screenshot below shows the values for simple SOLT value from my own implementation. Negative numbers! This is also true for the arbritary model. Any reason not to use the arbritary model? This will give you more accurat results. Measuring a capacitor at 430 MHz, this will make a difference. Measuring SWR at 7 MHz, just go ahead with the ideal model.

Regards
Michael, DG5MK

Thank you Michael.? I have the paper, and the numbers are negative.? The problem for me, is the statement "negative of the negative of the delays of the standard."? ?I watched a few videos, but when it got to inputting, they just blew past that, so there was no answer.? Thanks for your response, and I guess I will just input them exactly as stated, instead of trying to figure out the statement.?