Oscilloscope Reference Spectral math gating c ontrols
Spectral math gating controls
Gating determines which portion of the acquired waveform is transformed into the frequency domain. The
gate has a position and a width control.
The gate position is the time in seconds from the trigger location to the center 50% position of the gate
interval (see the next figure). The position and width units are seconds.
The gate must reside within the duration interval of the source waveform. If the source waveform duration
is adjusted, and the gate position and width would result in the gate being outside of that duration, then
the gate position or width is set within the limits.
The width of the gate affects the resolution bandwidth of the spectral analyzer. Gate width has units of
seconds. The resolution bandwidth directly controls the gate width, but the numerical value is entered
in units of hertz. Therefore, the time domain gate markers move as you adjust the resolution bandwidth
cont
rol.
The data contained in the gated region is transformed into the frequency domain.
Thegateisidentified on the display using dashed markers (similar to cursors). The default gate width
setting is e qual to the duration of the source waveform.
What do you want to do next?
Go to a list of all spectral math controls. (see page 760)
Learn more about spectral math controls. (see page 763)
Go to a step-by-step procedure for defining a spectral math waveform. (see page 623)
.
762 DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series
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