Setting Gate Shape - Agilent Technologies ENA Series User Manual

Operational procedure
Step 1. Press
which you want to set the gate type.
Step 2.
Step 3. Press

Setting gate shape

The gate is a filter whose shape looks like a band pass filter. There are several parameters
that indicate the gate shape. Figure 8-9 shows the definitions of them.
Figure 8-9 Parameters of gate shape
Table 8-1 shows the comparison of the characteristics depending on the gate shape. When
the shape is "minimum," the cutoff time is shorter and the response is deleted abruptly, but
the sidelobe level and band pass ripples become larger. When it is "maximum," cutoff is
gentler, but the sidelobe level and the band pass ripple become smaller. The minimum gate
span in Table 8-1 is the minimum gate range you can set. This value is defined as the
minimum gate span necessary for the existence of the pass band and is equal to 2 times the
cutoff time.
Table 8-6 Comparison of characteristics of gate
Gate shape Passband ripple
±0.13 dB
Minimum
±0.01 dB
Normal
Wide ±0.01 dB
±0.01 dB
Maximum
8
Deleting unnecessary data in time domain (gating)
(or
- Press to display the "Gating" menu.
Gating
to toggle between band pass (
Type
Sidelobe level
-48 dB
-68 dB
-57 dB
-70 dB
Analysis in Time Domain (Option 010)
) and (or
) and notch (
Bandpass
Cutoff time
1.4/frequency span
2.8/frequency span
4.4/frequency span
12.7/frequency span
) to activate a trace for
).
Notch
Minimum gate span
2.8/frequency span
5.6/frequency span
8.8/frequency span
25.4/frequency span
189