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|model=WM490 | |model=WM490 | ||
|class=Accessory | |class=Accessory | ||
|summary=Waveguide | |summary=Waveguide mixer | ||
|image=Tek_WM490.jpg | |image=Tek_WM490.jpg | ||
|caption=Tektronix WM490 | |caption=Tektronix WM490 |