General Operating Information 2
Keysight U2020 X-Series User’s Guide 53
5 Enable step detection in both manual and automatic average modes. The filter can be set to re-initialize upon detection
of a step increase or decrease in the measured power to reduce the filter settling time after a significant step in the
measured power.
6
Set the video averaging to average repetitions of a triggered signal, with a count of 1 to 256 in multiples of 2
n
. With
video averaging, the average of a number of acquisitions is calculated to smooth the displayed trace and reduce
apparent noise. The measurement requires a continuously repeating signal.
7 Set the video bandwidth.
The Low, Medium, and High pass band shapes achieved by the video bandwidth settings provide flat filter responses
with very sharp cut-off points by applying digital signal processing techniques to ensure accurate power measurement
within the specified band.
When the video bandwidth is set to Off, it removes all digital signal conditioning. This provides less than 3 dB roll-off at
≥500 MHz, and is best suited for capturing an accurate trace, minimizing overshoot, and removing any ringing effects
caused by the sharp cut-off filters used in the Low, Med, and High settings.
No. Function
<–3 dB
5 MHz 15 MHz
30 MHz
0
Frequency
Amplitude
High
Med
Low
Off
Bandwidth
setting
Band width filter shapes (for ≥500 MHz)
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