Keysight x-series Measurement Guide

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Making Time-Gated Measurements
Gated FFT Measurement
Figure 8-12 Viewing the Gated FFT Measurement results
The duration of the analysis required is determined by the RBW. Divide 1.83 by 4 ms to calculate the minimum
RBW. The pulse width in our case is 4 ms so we need a minimum RBW of 458 Hz. In this case because the RBW
is so narrow let the analyzer choose the RBW for the current analyzer settings (span). Check that the RBW is
greater than 458 Hz. Vary the RBW settings and note the signal changes shape as the RBW transitions from
1 kHz to 300 Hz.
NOTE If the trigger event needs to be delayed use the Trig Delay function under the Trigger menu.
Apply some small amount of trigger delay to allow time for the device under test to settle.
Step Action Notes

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)