December 14, 2025

Oscilloscope - 251

The Oscilloscope 251 uses standard BNC probes. Search for "P6100 100MHz probe" on eBay or Amazon ($10/pair). Ensure the probe has a 1x/10x switch.

Mandatory accessories:

To use the Oscilloscope 251 effectively, you must master the "Big Three" control clusters. oscilloscope 251

This controls the Voltage (Y-axis). You have two identical control banks for Channel 1 (CH 1) and Channel 2 (CH 2). The Oscilloscope 251 uses standard BNC probes

  • VARIABLE: A small knob usually set to the calibrated (detent) position. If turned, it lets you scale between settings (uncalibrated).
  • To effectively use the oscilloscope, one must understand how the image is generated on the screen. VARIABLE: A small knob usually set to the