GW Instek GDM-906 Series - Math Measurement

GDM-906X Series User Manual
86
Define
filter
window
Press the F6 (Window) key to enter the
subsequent menu. Press the F1 – F5 keys to
choose desired Filter Window percentage.
Range
0.01%, 0.1%, 1%, 10%, None
Turn off
Filter
Press the Shift key + the Menu (Filter) key. Press
the F2 (Filter) key to turn Off Filter function.
The Filter indicator will disappear from display.
Math Measurement
Applicable to
Background
Math measurement runs 6 types of mathematical
operations, dBm, dB, Compare, MX+B, 1/X and Percent,
based on the other measurement results.
Math Equation
dBm
10 x log10 (1000 x Vreading2 / Rref)
dB
dBm – dBmref
Compare
Checks and updates if measurement data
stays between the specified upper (high)
and lower (low) limit.
MX+B
Multiplies the reading (X) by the factor (M)
and adds/subtracts offset (B).
1/X
Divides 1 by the reading (X).
Percentage
Runs the following equation.
(ReadingX – Reference)
x 100%
Reference
dBm/dB/Watt Measurement
Applicable to