Bill's Tektronix 453 and 454 Info Pages
  Proper Grounding
High frequency scope measurements require careful grounding of the probe input! Don't assume that the ground leads provided with the probe are good enough for all applications. They work great at DC, but not at 150MHz.
If you see ringing on leading edge of pulses, assume that you need a better ground! Keep the ground lead as short as possible; use the bayonet ground adapter if you can.
  Back to 453/454 Scope Home Page