5-47
Making Measurements
Making voltage measurements automatically
Making voltage measurements automatically
Measurement units for each input channel can be set to Volts or Amps using
the channel Probe Units softkey. A scale unit of U (undefined) will be displayed
for math function 1-2 and for d/dt, and ∫ dt when 1-2 or 1+2 is the selected source
if channel 1 and channel 2 are set to dissimilar units in the channel Probe Units
softkey.
The following figure shows the voltage measurement points.
Math Measurements and Units
Only Peak-Peak, Maximum, Minimum, Average, X at Min, and X at Max automatic
measurements may be made on a math FFT function. See “Making time
measurements automatically” for the FFT X at Max and X at Min measurement. Use
the cursors to make other measurements on FFT. All voltage measurements may be
made on other math functions. The resultant units are:
FFT:
1*2:
1 – 2:
d/dt:
∫ dt:
dB* (decibels)
V
2
, A
2
or W (Volt-Amp)
V (Volts) or A (Amps)
V/s or A/s (V/second A/second)
Vs or As (V-seconds or A-seconds)
* When the FFT source is channel 1 or channel 2 (or channel 3 or 4 on the 54624A), FFT units
will be displayed in dBV when channel units is set to Volts and channel impedance is set to
1M
Ω. FFT units will be displayed in dBm when channel units is set to Volts and channel
impedance is set to 50
Ω (54640-series only). FFT units will be displayed as dB for all other FFT
sources or when a source channel’s units has been set to Amps.
Maximum
Minimum
Peak-Peak
Amplitude
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