Keysight 53220A/53230A 350 MHz Universal Frequency Counter/
Timer
User’s Guide
155
5 Triggering and Gating
Settings Summary  156
Trigger and Gate Cycle  157
Measurement Gate  168
53220A/53230A counter measurements are made by triggering the instrument 
and gating the input signal to select the portion or duration during which the 
input signal is measured. 
This chapter covers the counter’s trigger and gate cycles as they relate to counter 
measurements.