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IM AQ6376-01EN
1.3 Waveform Display
MAX/MIN HOLD Mode (Maximum/Minimum Value Detection Mode)
Writes the maximum/minimum values of the waveform data for each sweep.
When a trace is set to MAX/MIN HOLD mode, each time a sweep is performed, the data
at the individual measurement points are compared with prior measurements, and the
measurement with the higher level (MAX HOLD) or lower level (MIN HOLD) is written.
If you want to measure the maximum or minimum value of a waveform which changes
each time a sweep is performed, set the trace you want to measure to MAX/MIN HOLD
mode and perform REPEAT sweeping.
The trace display at the side of the data area appears as “MAX HOLD” or “MIN HOLD”.
Note that the NOISE MASK soft key setting applies when a waveform is displayed, and
is not affected when a maximum or minimum value is detected.
ROLL AVG Mode (Rolling Average Mode)
Writes the rolling average values of the waveform data during each sweep.
When a trace is set to ROLL AVG mode, each time measurement is performed the rolling
average of the current measurement and past measurements is calculated, and the
measurement data are updated. The number of averagings is set in the range of 2 to
100. The trace display at the side of the data area changes to “ROLL AVG”.
CALCULATE Mode (Calculation Results Display)
Writes the results of calculations performed between data from different traces.
When a trace is set to CALCULATE mode, subtraction between data from different
traces, normalized display, or curve-fit display is performed according to the set
CALCULATE mode. Note that CALCULATE mode can only be set for traces C, F, and
G. Also, the available calculations vary from trace to trace. For more information, see
chapter 6.
Normalized Display Function <<See section 5.6 for the operating procedure>>
This function is one of the trace CALCULATE modes. It normalizes and displays the
trace data.
With normalized display, normalization is performed and the waveform is displayed with
the waveform peak set to 1 if the sub-scale is linear, or set to 0 dB if the sub-scale is
LOG. One trace can be normalized, either trace A, B, or C. If both traces selected for
calculation are set to “BLANK”, then the sub-scale is displayed on the left side of the
screen. Otherwise it is displayed on the right side. The calculation results are displayed
in the sub-scale. The trace display at the side of the data area changes to “NORM @”.
Curve Fit
<<See section 5.7 for the operating procedure>>
Makes an approximation of the specified trace waveform. The result is written to TRACE G.
Calculations are applied to data from the peak to the threshold value. The threshold
value is set in the range of 0 to 99 dB (steps of 1). The trace display at the side of the
data area changes to “CRV FIT @.”
Peak Curve Fit <<See section 5.7 for the operating procedure>>
Makes an approximation of the specified trace waveform. The result is written to TRACE G.
Calculations are applied to mode peaks at or above the threshold value. The threshold
value is set in the range of 0 to 99 dB (steps of 1). The trace display at the side of the
data area changes to “PKCVFIT @”.