# Sensitivity

- Sensitivity:

  - High — The triggering system in higher bandwidth Infiniium oscilloscopes has a high-sensitivity trigger mode that lowers the hysteresis, allowing the oscilloscope to trigger on higher frequency waveforms. High sensitivity should be used for waveforms above 4 GHz.

  - Normal — The Infiniium triggering system is set, by default, to normal trigger sensitivity. In this mode, hysteresis is used in the trigger circuit to prevent incorrect double-triggering on low bandwidth waveforms. This is the normal sensitivity of all Infiniium oscilloscopes. Normal sensitivity should be used for all waveforms 4 GHz or below in frequency.

  - Noise Reject — This selection provides the greatest amount of hysteresis. With noisy signals, more false triggers are rejected.

- Coupling — When the Edge trigger is selected on an analog channel input trigger source, this option lets you specify the coupling for the trigger source:

  - DC — Allows DC and AC signals into the trigger path.

  Note that edge trigger coupling is independent of channel coupling (see Channel Dialog Box).