1 Preparation for Use
42 Keysight 53220A/53230A User’s Guide
Auto level
The threshold level is the trigger (input) level at which the counter begins the
measurement. Auto-level is the automatic setting of this threshold based on the
positive and negative peaks of the input signal.
The minimum frequency at which auto-leveling can occur is set as shown.
Slow sets the minimum frequency for auto-leveling at 50 Hz.
Fast sets the minimum frequency for auto-leveling at 10 kHz.
Refer to Threshold level and sensitivity in Chapter 4 for additional information on
using auto-level.