7 Using the Power Profiler Kit desktop application
Doc. ID 4425_027 v1.0
Page 23
automatically update their calculations also when
a plot is stopped. This makes it easy to select the
average data consumption at specific events.
Change graph color
Used to adjust the color of the graph (plot) displayed
in the
Plots
window of the PPK desktop application.
Change background color
Used to adjust the background color of the
Plots
window.
Voltage regulator (supply voltage - VDD)
Used to adjust the supply voltage. Adjusting the
voltage will only have an effect if the power is
supplied by the on-board regulator (the Power select
(
SW4
) switch is in the "Reg" position).
Switching points
The PPK has three different measurement ranges
(low/medium/high). The switching between them is
done automatically based on the defined switching
points. If your DUT has a current consumption
that is close to a switching point between the
different ranges, erroneous or misleading power
measurements can be made. To avoid this, you can
adjust the values for the switching points.
Use the
Switch up
setting (move the slider left/
right) to define the switching point from low to
medium range (
LO
value) and the switching point
from medium to high range (
HI
value). Changing
the switching points in the
Switch up
setting will
automatically adjust the switching points in the
Switch down
setting.
Use the
Switch down
setting (move the slider left/
right) to define the switching point from high to
medium range (
HI
value) and the switching point
from medium to low range (
LO
value).
For more information about the switching points, see
on page 8.
Resistor calibration
Each PPK is factory calibrated and the resistor values
are displayed in the
Resistor calibration
section of
the
Settings
window. If recalibration of your PPK is
needed, the resistor values can be adjusted.
Before adjusting these values, connect an accurate
current load to the External DUT (
P16
) connector.
While measuring the current with the PPK, adjust the
resistor values so that the measured current matches
the current load. Press the
Update
button to update
the PPK with new resistor values.
You can always go back to default factory values by
pressing the
Reset
button.
Typical current ranges:
• Lo: 1 µA - 70 µA
• Mid: 340 µA - 1.2 mA
