Start, Stop, Center, And Span Gate Times; Gating Type - Agilent Technologies FieldFox N9913A User Manual

Start, Stop, Center, and Span Gate Times

These settings specify the time in the trace to be gated (in or out). The gate times
can be specified using either Start and Stop or Center and Span.
 Press
 A settings table appears that allows you to navigate and select the following

Gating Type

This setting defines the type of filtering that will be performed for the gating
function. The gate start and stop flags on the display point toward the part of the
trace you want to keep.
 Choose from the following:
Gating Shape
This setting defines the filter characteristics of the gate function. Choose from
Minimum, Normal, Wide, Maximum.
Time domain Gate Shape setting
Cutoff time is the time between the stop time (-6 dB on the filter skirt) and the
peak of the first sidelobe.
 T
 T
 T
60
Gating Start/Stop
settings. These settings are made exactly like those made on the Transform
Settings table. Learn how on page 54.
Bandpass
- KEEPS the responses within the Gating Start and Stop times.
o
Notch
- REMOVES the responses within the Gating Start and Stop times.
o
Gate Shape Passband
Ripple
Minimum 0.1 dB
Normal 0.1 dB
Wide 0.1 dB
Maximum 0.01 dB
is the gate span, which is equal to the stop time minus the start time.
1
is the time between the edge of the passband and the 6 dB point,
2
representing the cutoff rate of the filter.
is the time between the 6 dB point and the edge of the gate stopband.
3
Sidelobe Cutoff Time
Levels
-48 dB 1.4/Freq Span
-68 dB 2.8/Freq Span
-57 dB 4.4/Freq Span
-70 dB 12.7/Freq Span
Minimum Gate
Span
2.8/Freq Span
5.6/Freq Span
8.8/Freq Span
25.4/Freq Span
FieldFox User's Guide