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Key Reference
Waveform (Time Domain) Keys
Waveform (Time Domain) Keys
NOTE
You must have selected Waveform under the Key Path: MEASURE menu
to access these menus.
Measurement Setup Key Menu
Key Path: Meas Setup
• Sweep Time - Specifies the measurement acquisition time which is
used as the length of the time capture record. The range is 1.0 µs and
100.0 s, depending upon the resolution bandwidth setting and the
available internal memory size for acquisition points.
• Res BW - Sets the measurement bandwidth. The range is 10 Hz to 8
MHz using the Gaussian filter selected from RBW Filter under the
Advanced menu, or 10 Hz to 10 MHz using the Flat top filter selected
from RBW Filter. A larger bandwidth results in a larger number of
acquisition points and reduces the maximum value allowed for the
sweep time.
• Average
Key Reference
— Avg Number - Changes the number of N averages.
— Avg Mode - Toggles the averaging mode between Exp (exponential)
and Repeat. This selection only effects on the averaging result
after the number of N averages is reached. The N is set using the
Avg Number key.
• Normal averaging: Normal (linear) averaging is always used
until the specified number of N averages is reached. When the
Measure key under Meas Control is set to Single, data
acquisition is stopped when the number of N averages is
reached, thus Avg Mode has no effect in the single
measurement mode.
• Exponential averaging: When Measure is set to Cont, data
acquisition will continue indefinitely. Exponential averaging is
used with a weighting factor of N (the displayed count of
averages stops at N). Exponential averaging weights new data
more heavily than old data, which allows tracking of
slow-changing signals. The weighting factor N is set using the
Avg Number key.
• Repeat averaging: When Measure is set to Cont, data
acquisition will continue indefinitely. After the number of N
averages is reached, all previous result data is cleared and the
average count displayed is set back to 1. This is equivalent to
being in Measure Single and pressing the Restart key each time
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Chapter 5