6-12
IM AQ6370D-01EN
Explanation
When a trace is set to ROLL AVG mode, each time measurement is performed the sweep
average is taken of the current and past measured data, and the measurement data are
updated.
The roll averaging is calculated according to the following equation.
Wj (i) =Wj-1 (i)• (n - 1)/ n + W (i) •1 / n ( i=1, 2•••••••••••••••N)
Wj (i): Newly displayed waveform
Wj-1(i): Previously displayed waveform
W (i): Newly obtained waveform
N: Number of sampling points
n: Number of averagings
Note
• The setting values of the NOISE MASK function are not affected by sweep averaging. The
noise mask is executed when the results of the sweep average are displayed.
• When CHOP MODE in the measurement sensitivity settings is set to SWITCH, two
sweepings is one count.
6.4 Sweep Average
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