HP 8753E User Manual page 137

Network analyzer

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Gate Span Minimum

I NOTE: With 1601 frequency points, gating is available only in the bandpass mode.

The passband ripple and sidelobe levels are descriptive of the gate shape. The cutoff time is the

time between the stop time (-6 dB on the filter skirt) and the peak of the first sidelobe, and

is equal on the left and right side skirts of the hlter. Because the minimum gate span has no

passband, it is just twice the cutoff time.

13. 'lb see the effect of the gating in the frequency domain, press:

This places the gated response in memory. F'igure 2-62 shows the effect of removing the RF

leakage and the triple travel signal path using gating. By transforming back to the frequency

domain, we see that this design change would yield better out-of-band rejection.

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