U2021XA Datasheet, PDF (4/20 Pages) Keysight Technologies – U2020 X-Series USB Peak and Average Power Sensors

04 | Keysight | U2020 X-Series USB Peak and Average Power Sensors – Data Sheet
Bundled intuitive power analysis
software
The U2020 X-series USB power sensors
are bundled with a free N1918A Option 100
Power Analyzer PC license key. Simply
connect the USB power sensor and the
PC will recognize the license.
A N1918A Power Analysis Manager
software CD will be shipped together
with the U2021XA or U2022XA. Users
can also download the software from
www.keysight.com/find/N1918A.
The U2020 X-Series is supported by the
Keysight BenchVue software (version 2.5
and above). BenchVue makes it easy to
control your power meter to log data and
visualize measurements in a wide array of
display options without any programming.
This software is available on the Keysight
Instrument Control DVD, which is included
with each sensor. You can download the
latest version of the software cost free
at www.keysight.com/find/BenchVue.
Upgrading to the paid BenchVue Power
Meter Pro version (BV0007A) provides
unrestricted data logging.
Keysight recommends that you use the
BenchVue software for new projects or
applications.
Complementary cumulative
distribution function (CCDF)
curves
CCDF characterizes the high power
statistics of a digitally modulated signal,
and is defined by how much time the
waveform spends at or above a given
power level. The U2020 X-series supports
two types of CCDF curves. Normal CCDF
displays the power statistics of the whole
waveform under free run, internal or
external trigger modes. Gated CCDF can
be coupled with a measurement gate and
only the waveform within the gated region
is analyzed statistically. Gated CCDF is
only applicable in internal trigger and
external trigger modes.
Designers of components, such as power
amplifiers, will compare the CCDF curves
of a signal at the amplifier’s input and
output. A well designed component will
produce curves that overlap each other. If
the amplifier compresses the signal, then
the peak-to-average ratio of the signal will
be lower at the output of the amplifier. The
designer will need to improve the range of
the amplifier to handle high peak power.