But it gets worse as the frequency goes up. In the following graph probe impedance in ohms is shown on the vertical axis and frequency ... For those of us working at more modest frequencies, say 50 to ...

In short, [Christer] needed a high-frequency active differential oscilloscope probe, and they’re not cheap. So he built one himself. With some minor tweaking on the input damping resistors ...

A pelvic ultrasound scan uses high frequency sound waves to create a picture of the area between your hip bones (your pelvis). It it sometimes called a gynaecological ultrasound. The ultrasound ...