Calibrate And Measure - HP 8753E User Manual

8. Tbmaximiz e the dynamic range in the stopband (increasing the incident power and
narrowing the IF bandwidth), press:
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Calibrate and Measure

1. Remove the DUT and perform a full two-port calibration. Refer to Chapter 5, "Optimizing
Measurement Results. n
With the thru connected, set the scale to autoscale to observe the benefits of using swept
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list mode.
The segments used to measure the stopbands have less noise, thus maxinUng dynamic
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range within the stopband frequencies
The segment used to measure the passband has been set up for faster sweep speed with
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more measurement points.
Figure Z-52. Calibrated Swept List Thru Measurement
Reconnect the filter and adjust the scale to compare results with the first filter measurement
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that used a linear sweep.
In Figure 2-53, notice that the noise level has decreased over 10 dB, conllrming that the
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noise reduction techniques in the stopbands were successful
In Figure 2-53, notice that the stopband noise in the third segment is slightly lower than in
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the first segment. This is due to the narrower IF bandwidth of the third segment (300 Hz).
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