Durdraw is a passion project, and is given away for free with source code under a BSD 3-Clause License. Many hours of unpaid work have gone into creating this softwre.
I did not have a proper fine pitch GSG probe or anywhere to land it, so I created a crime against metrology consisting of a pair of SMA cables off the front of the VNA, a pair of SMA to dual 0.1” pin header adapterss (yes, these exist), a pair of single ended 0.1” extension wires, and a set of PCBite SP10 probes. It wasn’t the slightest bit impedance matched and I had no way to calibrate it (as a rough baseline, insertion loss was somewhere in the vicinity of -10 dB with the probes touching due to all of the reflections in the setup) but for narrowband measurements where I just wanted to check if the crystal was resonant or not, it would do.
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“但江湖豪气是他的风格，他的底色从来不是一个商人。”前述老员工如此形容贾国龙。
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