AEMC OX III Series User Manual page 85

Oscilloscope Mode - The "Measure" Menu
Oscilloscope Mode (cont'd)

Reference memory
difference

Example

20 automatic
measurements
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 It is possible to select two permanent measurements.
 The "" symbol indicates the measurement(s) that will be indicated
in the status area.
 Activation of the automatic measurements causes two markers (+) to
appear on the curve, if at least one period is visible on the screen.
 The display order corresponds to the chronological order of the
selection and the markers are assigned to the first measurement
selected.
Automatic measurements in the status area can be deleted by means of
this menu, by erasing the selected measurements (no "" symbol in the
automatic measurements table).
Activation of the "Reference memory difference" option is a way of
calculating the deviations, for all the automatic measurements, between
the selected trace and the memorized reference trace (see §. Memory
Menu).
Calculation performed and displayed on one of the 20 automatic
measurements:
Vpp (Ref. memory difference) = Vpp (Trace 1) – Vpp (Trace 1  Ref 1)
The calculation is performed in the same way for all the measurements.

This option is only active if a reference trace is present.
It must correspond to the trace on which you wish to perform
automatic measurements

( Example: Trace 1 and Trace 1

Condition: the reference trace must have the same characteristics as
the associated trace (sensitivity and time base)
Vmin minimum peak voltage
maximum peak voltage
Vmax
Vpp peak-to-peak voltage
Vlow established low voltage
Vhigh established high voltage
amplitude
Vamp
Vrms rms voltage
Vrms_c Rms voltage performed on an integer number of cycles
Vavg average voltage
positive overshoot
Over+
Trise rise time
Tfall fall time
positive pulse width (at 50 % of Vamp)
W+
negative pulse width (at 50 % of Vamp)
W-
P period
F frequency
DC cyclic ratio
number of pulses
N
Over- negative overshoot
Sum summon of instantaneous values of the signal
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IV - 85