Tektronix TPS2012B, User Manual

Page: 71 / 184

Application Examples
Viewing a Math Instantaneous Power Waveform
You can use a voltage probe, a current probe, and the oscilloscope math multiply
function to view an instantaneous power waveform.
NOTE.
Be sure to understand the rating of the voltage or current probes you are
using. Do not exceed the probe rating. (See page 3, Probe Connection.)
To view a math instantaneous power waveform, follow these steps:
1. Connect a voltage probe to channel 1, and a current probe to channel 2.
WARNING.
Do not fl oat the TPP0101 or TPP0201 probe reference lead to >
30 V
RMS
. Use the P5120 probe ( fl oatable to 600 V
RMS
CAT II or 300 V
RMS
CAT III)
or similarly rated, passive, high voltage probe (not the ground referenced P5100
probe), or an appropriately rated, high voltage, differential probe when
fl oating
the reference lead above 30 V
RMS
, subject to the ratings of such high voltage probe.
To avoid electric shock when using probes with exposed metal parts, do not
connect the reference lead to voltages above 30 V
RMS
.
2. Push the channel 1 .
3. Push Probe ► Voltage ► Attenuation and set to match the attenuation
of the voltage probe.
4. Push the channel 2 .
5. Push Probe ► Current ► Scale and set to match the scale of the current
probe.
6. Push the AutoSet .
TPS2000B Series Digital Oscilloscope User Manual 45