Operating Basics
76 TDS5000B Series Quick Start User Manual
Using the Time Controls
The time domain controls for the spectral waveform are:
H Duration, which selects the time from the beginning to the end of the acquired waveform. Set duration
using the record lengt h and/or the sample rate controls.
H Resolution, which determines the time between samples. Duration is kept constant as resolution is
changed. Therefore, the Resolution control affects both the sample rate and the rec ord length simulta -
neously.
Using the Gating Controls
Gating determines which portion of
the acquired waveform is transformed
into the freque ncy domain. The ga te
has a position and a width control.
The gate position is the time in
seconds from the trigger location t o
the center 50% position of the gate
interval. The position and width units
are seconds.
Gate
width
Zero phase reference
Time domain
acquisition
Frequency domain samples
Gate
position
Gate
Trigger
position
Duration
Using the Frequency Controls
The frequency domain controls for the spectral waveform are:
H Span, which is the frequency at the end of the spectral waveform minus the frequency at the beginning of
the waveform.
H Center, which is the frequency at the center of the spectral waveform. Center is equal to the start frequency
plus one half of the span.
H Resolution bandwidth, which is the 3 dB down bandwidth of the spectral a nalyzer frequency response to a
sine wave input.
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