User`s guide

6 Measurements and Math Functions
226 InfiniiVision Oscilloscopes User’s Guide
Units
Units for each input channel can be set to Volts or Amps using the Units softkey in the
channel’s Probe Menu. Scale and offset units are:
A scale unit of U (undefined) will be displayed for math functions when two source
channels are used and they are set to dissimilar units and the combination of units
cannot be resolved.
Math function Units
add or subtract V or A
multiply V
2
, A
2
, or W (Volt-Amp)
d/dt V/s or A/s (V/second or A/second)
 dt Vs or As (V-seconds or A-seconds)
FFT dB
*
(decibels)
(square root) V
1/2
, A
1/2
, or W
1/2
(Volt-Amp)
* When the FFT source is channel 1, 2, 3 or 4, FFT units will be displayed in dBV when channel
units is set to Volts and channel impedance is set to 1 M. FFT units will be displayed in dBm
when channel units is set to Volts and channel impedance is set to 50. FFT units will be
displayed as dB for all other FFT sources or when a source channel’s units has been set to Amps.