Keysight Technologies U2020 X Series User manual

Keysight Technologies
U2020 X-Series
USB Peak and Average Power Sensors
Demo Guide

2
The instruments and software listed in the table below are required to perform
the demonstrations.
To download and update the instrument firmware or software, please visit:
www.keysight.com/find/usbpeaksensor
Product Type Minimum System Requirement
Keysight U2020XA Series USB peak
and average power sensors
–U2021XA or U2022XA
–Firmware version A.01.00 or
later
Keysight USB 2.0 compliant cable,
Mini-B connector with locking
mechanism
–U2031A, U2031B, U2031C
Keysight N5182A MXG Signal Vector
Analyzer
–Firmware version A.01.80 or
later
–Frequency range option 503 or
506
–Baseband generator option 651
or 652
Keysight IO Libraries Suite Version 16.2.xx or later
Keysight N1918A Power Analysis
Manager Power Analyzer (R03.05.xx or later)
Demonstration Preparation
1. Alternatively, you can substitute the N5182A MXG with the E4438C ESG Vector Signal Generator, firmware
revision C.04.98 or later, frequency range option 503 or 506, and baseband generator option 601 or 602
Instructions for PC, U2021XA, and
MXG Connectivity
Procedures
1. Connect the Laptop (installed with the N1918A Power Analysis Manager,
Power Analyzer) to the U2021XA USB power sensors via the USB
Mini-B cable.
2. Connect the U2021XA USB power sensors to the RF Output of the
N5182A MXG signal generator shown in Figure 1.
3. Connect the BNC-SMB cable from the N5182A MXG signal generator’s
rear panel Event 1 to the Trig In socket on the U2021XA USB power
sensor.
4. Launch the Keysight Connection Expert application (Keysight IO Libraries
Suite) and verify the connection of the U2021XA USB power sensors.
Figure 1. Laptop, U2021XA and MXG signal generator setup diagram
Event 1
BNC-SMB cable
N5182A MXG Signal Generator
Trig In
U2021XA Series
USB Power Sensor
USB Mini-B
cable Laptop

3
Keysight N1918A Power Analysis Manager
The Keysight Technologies, Inc. N1918A Power Analysis Manager, Power Analyzer is a Windows-based free license application
software for the U2020XA Series USB Peak and Average power sensors. This application software enables you to perform
advanced power analysis measurements in real time.
For more information on the N1918A Power Analysis Manager, refer to the Keysight N1918A Power Analysis Manager
Datasheet, Literature Number 5989-6612EN

4
Objectives
To demonstrate the capabil-
ity of the Power Analyzer to
perform power measurement
and switch the measurement
display to compact mode.
Average Power Measurement in Compact Mode Display
Demonstration 1
Instructions Keystrokes
On the MXG
1. Set instrument to its default
settings Press [Preset]
2. Set the frequency and ampli-
tude
Frequency = 1 GHz
Amplitude = 0 dBm
–Press [Frequency] [1] {GHz}
–Press [Amplitude] [0] {dBm}
3. Turn on the RF Output –Turn [RF On/Off] to “On”
In the Power Analyzer
Double-click on the Power Analyzer
application software shortcut on your
desktop or access the program via the
Windows Start menu.
4. Run the Power Analyzer
(Note: The latest version of Power
Analyzer demonstrated in this demo
guide will start the measurement upon
running of the
application software)
5. Set the frequency to 1 GHz
(See Figure 2)
–Click {channel} on the Instrument
Navigator panel
–Set Frequency (Hz) to “1G” on the
Instrument Properties panel
6. Switch the normal mode dsplay
to compact mode (See Figure 3)
–Move the cursor to highlight
instrument measurement 1
–Click Switch { } the Power
Analyzer toolbar
7. Switch the compact mode
to normal mode display (soft
panel)
Click Switch { } on the Power Ana-
lyzer
8. Stop the measurement Click Stop { } on the Power Analyzer
In this guide, keystrokes surrounded by [ ] represent front panel keys of the
instruments, keystrokes surrounded by { } represent softkeys of the instrument,
and keystrokes in bold represent the softkeys of the software.

5
Figure 2. Average power measurement shown in normal mode display (soft panel)
Figure 3. Compact mode display show the average power
measurement

6
Objectives
– To demonstrate the alert func-
tions where the system will
notify you the exact time and
date the power measurements
of your DUT has exceeded
the specied upper and lower
limits. Alert functions are es-
pecially useful for applications
such as aging and reliability
text where long test times are
required.
– To demonstrate the strip chart
function in the Power Analyzer
application software, which
allows the user to monitor, re-
cord, and playback the power
measurements tend for a long
period of time.
Enable Alert, Limit, and Recording using Power Analyzer
Demonstration 2
Instructions Keystrokes
(Continue from Demo 1)
On the MXG
1. Set amplitude power to 0.1 dBm Press [Amplitude], [0.1], {dBm}
In the Power Analyzer
2. Add strip chart display
–Click Create Strip Chart { } on
Power Analyzer toolbar.
–Select “Meas ID” and “Current
Active Tab”, then click “OK”
3. Delete the normal mode display
–Click Stop { } on the Power
Analyzer toolbar
–Move the cursor to highlight
normal mode display
–Click { } to delete normal
mode display
–Click Run { } to continue
the measurement
4. Enable limit and alert of
measurement (See Figure 4)
Upper Limit = 0.1 dB
Lower Limit = –0.1 dB
–Click {Measurements} on the
Instrument Navigator panel
–In Instrument Properties panel,
check “Enable Alert”
–Set Upper Limit to “0.1” and Lower
Limit to “–0.1”
5. Enable recording function
(See Figure 6)
–Click Stop { } on the Power
Analyzer toolbar
–Move the cursor to highlight
normal mode display
–Click Recorder { } on the Power
Analyzer toolbar.
–The Recorder menu will prompt
up, select specific time for
recording and enter the recording
file name. In this example, select
“Immediately” and enter the
filename as “Texting” then click
“OK”

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Figure 4. Alert Limits textbox allows user to enter upper/lower limit as per their requirements
Figure 5. Click Alert Indicator { } to view the alert summary as shown here in order
to identify the timestamp where the measurement was over the alert limit
Figure 6. Recording file saved as *.csv can be
viewed via MS Excel

8
Objectives
– To demonstrate the capability
of the U2021XA Series USB
power sensors to obtain
15-point pulse parameter
values from the trace graph,
where the parameters values
are automatically
calculated by the Power
Analyzer application software
whenever a trace pattern
appears on the graph.
– To demonstrate the capability
of the dual gates feature to
measure the pulse width
and pulse period signal
respectively.
– In this demo, pulse signal with
pulse period 40 μs and pulse
width 10 μs will be generated
from the signal generator.
The U2021XA Series USB
power sensors measures the
average, peak, and peak-to-
average of the pulse signal via
the dual gated feature.
Pulse Power Measurement
Demonstration 3 Instructions Keystrokes
On the MXG
1. Set instrument to its default
settings Press [Preset]
2. Set the frequency and ampli-
tude
Frequency = 1 GHz
Amplitude = 0 dBm
–Press [Frequency] [1] {GHz}
–Press [Amplitude] [0] {dBm}
3. Set the pulse signal –{Pulse Period}, [40], {μsec}
–{Pulse Width}, [10], {μsec}
4. Activate the pulse signal Toglle {Pulse On/Off} to “On”
5. Turn on the RF Output Toglle [RF On/Off] to “On”
In the Power Analyzer
6. Run the Power Analyzer
Double-click on Power Analyzer
application software shortcut on your
desktop or access the program via the
Windows Start menu.
7. Set the frequency to 1 GHz
(See Figure 7)
–Click {channel} on the Instrument
Navigator panel.
–Set Frequency (Hz) to “1G” on the
Instrument Properties panel.
8. Add trace graph display
–Click { } on the Power
Analyzer toolbar.
–Select “Meas ID” and “Current
Active Tab” then click “OK”.
9. Delete the normal mode display
–Click Stop { } on the Power
Analyzer toolbar
–Move the cursor to highlight the
normal mode display and click {
} to delete the normal mode
display.
–Click Run { } to continue the
measurement.
Measure Pulse Width Signal
10. Add dual gates to measure
pulse width signal, 10 μs (See
Figure 8)
Move the cursor to highlight the trace
graph display. Right-click on the trace
graph display and select “Apply Gate
Option”, Gate 1. Move the dual gated
(vertical line) to the highlighted pulse
width duration.
Measure Pulse Period Signal
11. Add dual gates to measure
pulse period signal, 40 μs (See
Figure 9)
Move the cursor to highlight the trace
graph display. Right-click on the trace
graph display and select “Apply Gate
Option”, Gate 2. Move the dual gated
(vertical line) to the highlighted pulse
width duration.
12. Add 15-point pulse parameter
values from the trace graph
display (See Figure 10)
In the Measurement Panel (bottom of
the trace graph display), click “Mea-
surement Selector”, then check “Select
All” under Pulse Measurement menu,
and click
“Apply”.

9
Figure 7. Average power measurement of pulse signal (pulse period 40 μs and pulse width 10 μs)
Figure 8. Pulse width measurement (delta time, average, peak and peak-to-average) blue line shown in Pulse Analysis table

10
Demonstration 2
Figure 9. Pulse period measurement (delta time, average, peak and peak-to-average power) orange color shown in Pulse Analysis table (on top of pulse
width measurement
Figure 10. Pulse Analysis table consists of 15-point pulse parameter values.

11
Objectives
– To demonstrate the capability
of U2021XA Series USB
power sensors to measure
burst power (average,
peak and peak-to-average)
signal via external/internal
triggering methodology and
automatically calculated by
Power Analyzer application
software whenever a burst
waveform appears on the
graph.
– To demonstrate the capability
of the dual gates function to
measure the burst signal.
– In this demo, GSM burst
signal with 4.613 ms duration
(consists of 8 timeslots and
each timeslot with 577 μs
duration) will be generated
from the signal generator (See
Figure 11).
– Using external triggering from
Event 1 of signal generator, to
synchronize with the U2021XA
USB power sensors via Trig
In port before starting to
capture GSM waveform for
measuring the average, peak
and peak-to-average power
(see Figure 1).
Burst Power Measurement
Demonstration 4
Instructions Keystrokes
On the MXG
1. Set instrument to its default
settings Press [Preset]
2. Set the frequency and ampli-
tude
Frequency = 1 GHz
Amplitude = 0 dBm
–Press [Frequency] [1] {GHz}
–Press [Amplitude] [0] {dBm}
3. Recall GSM modulation signal
–Press [Mode], {Dual ARB},
{Select Waveform}, {Waveform
Segments}
–Press [ ] or [ ] to select
{GSM_BURST_WFM}
4. Set GSM modulation signal
–Press [Mode], {Dual ARB},
{Select Waveform}
–Press [ ] or [ ] to highlight
{GSM_BURST_WFM}
–Press {Select Waveform} and
toggle {ARB ON/Off} to “On”
5. Set external triggering for GSM
modulation signal
Press [Mode], {Dual ARB} and [More],
{Marker Utilities}, {Route Connectors},
{Route to Event 1 BNC} and {Marker 2}
6. Turn on the RF Output Toggle [RF On/Off] to “On”
Figure 11. GSM timeslot pattern with timeslot 0 on
4.613 ms timeframe duration
577 μs timeslot duration

12
Instructions Keystrokes
In the Power Analyzer
1. Run the Power Analyzer
Double-click on the Power Analyzer
application software shortcut on the
desktop or access the program via the
Windows Start menu
2. Set the frequency to 1 GHz
–Click {Channel} on the Instrument
Navigator panel
–Set Frequency (Hz) to “1G” on the
Instrument Properties panel
3. Add trace graph display
–Click { } on the Power
Analyzer toolbar.
–Select “Meas ID” and “Current
Active Tab” then click “OK”
4. Delete the normal mode display
–Press Stop { } on the Power
Analyzer toolbar.
–Move the cursor to highlight the
normal mode display.
–Click { } to delete the normal
mode display.
–Click Run { } continue the
measurement.
5. Congure trace display to cap-
ture GSM 4.613 ms waveform
–Click {Channel} on the Instrument
Navigator panel
–Set Trace Start (s) to “–100μ” and
Trace Length (s) to “5m”
6. Congure power sensor to
external triggering mode
–Click {Trigger}
–Set “Global Trigger Source” to
“External”
Measure GSM Timeslot 0 Time-Gated Signal (Average, Peak, and Peak-to-Average
Power)
7. Add dual gates to measure GSM
timeslot 0 duration (See Figure
12).
–Move the cursor to highlight the
trace graph display
–Right-click on the trace graph
display and select “Apply Gate
Option”
and “Gate 1”
–Move the dual gated (vertical line)
to highlight the GSM timeslot 0
duration
Measure GSM Waveform Signal (Average, Peak, and Peak-to-Average Power)
8. Add dual gates to measure GSM
whole waveforms (See Figure
13).
–Move the cursor to highlight the
trace graph display
–Right-click on the trace graph
display and select “Apply Gate
Option”
and “Gate 2”
–Move the dual gated (vertical line)
to highlight the GSM waveform

13
Figure 12. Dual gate (Gate 1) press ON GSM timeslot 0, shows delta time, average power, peak power, peak to average power measurement
Figure 13. Dual gate (Gate 2) press ON GSM waveform signal 4.613 ms duration, shows delta time, average power, peak power, and peak to average
power measurement

14
A CCDF curve is defined by how much time the waveform spends at or above a
given power level. This is expressed in dB relative to the average power.
A CCDF curve is a plot of relative power levels versus probability where the
X-axis represents the dB above the average signal power, while the Y-axis
represents the percent of time the signal spends at or above the power level
specified by the X-axis.
Objectives
– To demonstrate the
capability of U2021XA
Series USB power sensors to
measure and compute time-
gated CCDF and waveform
CCDF measuremenet in trace
display view via the N1918A
Power Analysis Manager,
Power Analyzer.
– To demonstrate the capability
of the dual gates function to
measure and computer the
measurement in time-gated
CCDF (Burst CCDF) and
waveform CCDF.
Time-Gated CCDF and Waveform CCDF Measurements
Demonstration 5
Complementary Cumulative Distribution Function (CCDF)
Figure 14. CCDF plot shows the Y-axis that represents the percentage of time the
signal power equals the power specified by the X-axis
Conventional peak power meter/sensors provide a built-in function of waveform
CCDF measurement in graphical and table format. Waveform CCDF calculates
CCDF and peak-to-average ratio using the entire waveform, including portions
where the data is zero (no signal).
Waveform CCDF
Time-gated CCDF or Burst CCDF calculates the entire waveform using only the
actual signal instead of the whole waveform. Gated function of the U2020XA
Series USB power sensor allows the user to allocate the gated (marker 1 and
2) on specific burst on duration where the signal is computed as a time-gated
CCDF measurement.
Time-Gated CCDF

15
Instructions Keystrokes
(Continue on from Demo 4)
In the Power Analyzer
1. Delete GSM waveform dual gated
measurement
–Move the cursor to highlight the
trace graph display.
–Right-click on the trace graph
display and select “Apply Gate
Option” and “Gate 2”
–Gate 2 measurement will disap-
pear and be removed from the
trace display
2. Create time-gated CCDF graph
–Click CCDF graph { } on the
Power Analyzer toolbar. Select
“Meas ID” and “Current Active
Tab”
–Click “OK”
–In CDDF Type Selector menu, click
“Gated CCDF”
–Click “OK”
Measure Time-Gated CCDF
3. Apply Gate 1 signal into Time-Gat-
ed CCDF graph (See Figure 15)
–Move the cursor to highlight the
Gated CCDF graph display.
–Right-click the graph display,
select “Couple to Measurement
Gate”
and “Gate 1”.
Measure Waveform CCDF
4. Move Gate 1 (marker 1 and 2) to
measure waveform CCDF graph
(See Figure 16).
–Move the cursor to highlight the
trace display graph.
–Move the “Gate 1” dual gated
(vertical line) to highlight the GSM
whole waveform signal.

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Figure 16. Gate 1 (blue lines on the trace display) press ON the entire waveform of GSM, including the burst off portion, and computes the waveform CCDF
measurement in table format
Figure 15. Gate 1 (blue lines on the trace display) press ON the GSM timeslot 0 duration, to compute the time-gated CCDF measurement shown in table format

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Ordering Information
For further information, refer to Keysight U2020 X-series USB Peak
and Average Power Sensors Product Fact Sheet, Literature Number
5991-0308EN.
Related Literature
– Keysight U2020 X-Series USB Peak and Power Sensors, Data
Sheet, Literature Number 5991-0310EN
– Keysight N1918A Power Analysis Manager, Technical Overview,
Literature Number 5989-6613EN
– Keysight N1918 Power Analysis Manager, Installation Guide,
Manual Part Number N1918-90002

18 | Keysight | U220 X-Series USB Peak and Average Power Sensors - Demo Guide
This information is subject to change without notice.
© Keysight Technologies, 2017
Published in USA, December 1, 2017
5991-1221EN
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