e_esEin schönes Testboard für #VNA:
Filter, Diff, Match, open, stub, ...
https://github.com/antmicro/signal-integrity-test-board
https://openhardware.antmicro.com/boards/si-simulation-test-board/
VTC News BotTổng Bí thư Tô Lâm đã có cuộc điện đàm với Thủ tướng Singapore Lawrence Wong chiều 30/1 tại Trụ sở Trung ương Đảng. Hai bên nhấn mạnh tầm quan trọng của quan hệ đối tác chiến lược Việt Nam - Singapore, trao đổi về định hướng thúc đẩy hợp tác kinh tế, an ninh, chuyển đổi số và giao lưu nhân dân trong thời gian tới.
#Vietnam #Singapore #Diplomacy #TongBilam #LawrenceWong #QuanHeDoiNgo #DoiTacChienLuoc #VietnamSingapore #VNA #外交 #越南 #新加坡
A 1990s VNA Gets An LCD https://hackaday.com/2026/01/10/a-1990s-vna-gets-an-lcd/
#RadioHacks #Lcd #VectorNetworkAnalyser #Vga #Vna
#RadioHacks #Lcd #VectorNetworkAnalyser #Vga #Vna
niconiconiCool VNA calibration paper: Backward-Unknown-Thru. Instead of SOLR (which is just SOLT with an unknown adapter), in the Backward-Unknown-Thru, you measure a flush Thru at the near end of the test cables, and do two 1-port calibrations at the far end. The solved Unknown Thru will have a negative length, which is the "mirror image" of the test cable error. Great if the two far-end ports are really "far". Even better, you can measure the 2-port Thru first, before doing two 1-port calibrations, this way the cable movement error is absorbed into the error box. #electronics #vna
* J.-H. Kim, J.-S. Kang, J.-I. Park, and C.-H. Cho, “Backward Unknown-Thru calibration method,” in 2020 95th ARFTG Microwave Measurement Conference (ARFTG), Aug. 2020, pp. 1–3. 10.1109/ARFTG47271.2020.9241362.
* J.-H. Kim, J.-S. Kang, J.-I. Park, and C.-H. Cho, “Backward Unknown-Thru calibration method,” in 2020 95th ARFTG Microwave Measurement Conference (ARFTG), Aug. 2020, pp. 1–3. 10.1109/ARFTG47271.2020.9241362.
Onno (VK6FLAB)
sperber64And this is how you can measure your choke aka Ugly Balun with a quick and dirty solution. VNA set to Logmag.
Candidus DünschAn die im Impressum der Deutsche Wohnen App genannte Adresse der Vonovia kassen sich gar keine Nachrichten übermitteln.
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