Oscilloscope probe comparison

Used oscilloscopes:

• Uni-T UTD2025C, 25 MHz bandwidth
• Tektronix TDS540D, 500 MHz bandwidth
  Used probe: UT-P01 with 10x enabled (25 MHz bandwidth).

Measuring signal at laser current output J2:

Laser supply voltage 10V:
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Uni-T, factory BNC-U.FL cable

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Uni-T, probe

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Tektronix, factory BNC-U.FL cable

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Laser supply voltage 15V:
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Uni-T, factory BNC-U.FL cable

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Uni-T, probe

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Uni-T, probe with spring ground

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Tektronix, factory BNC-U.FL cable

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Tektronix, factory BNC-U.FL cable + 50 ohm load is enabled in oscilloscope

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Tektronix, probe

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Tektronix, probe with spring ground