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OscilloscopeS

• Intro
• How not to blow up your scope
• Isolation
• Frequency Measurement Analog Scope - good.
• Lissajous Patterns #48
  • phase shift. 90˚ is a circle if frequency is the same. Lines if in phase, falling if 180˚ out of phase
  • doubled freq results in figure 8
  • dances at beat frequency.
• alt chop add#31 ]] invert to subtract
• AC-DC Coupling good to look at ripple on power supplies| Saturation.. need to look more
• probe tour #9
• Power Supply Noise Measurement --- short leads.
• Noise from switching power supplies
• EEVblog #441 - How To Track Down Common Mode Noise
• Tektronics Triggering

Isolation Transformers

• Triad 500 $141
• TRiad 250
• Triplight 250
• https://www.digikey.com/product-detail/en/triad-magnetics/N-55MG/237-1863-ND/4915277 $79 Triad common green ground. Isolated hot and neutral.
  • Mouser source $78.78