Keysight Technologies U2020 X-Series - USB Peak and Average Power Sensors Demo Guide
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Keysight Technologies
U2020 X-Series
USB Peak and Average Power Sensors
Demo Guide
Demonstration Preparation
The instruments and software listed in the table below are required to perform
the demonstrations.
Product Type Minimum System Requirement
–– U2021XA or U2022XA
Keysight U2020XA Series USB peak
–– Firmware version A.01.00 or
and average power sensors
later
Keysight USB 2.0 compliant cable,
Mini-B connector with locking –– U2031A, U2031B, U2031C
mechanism
–– Firmware version A.01.80 or
later
Keysight N5182A MXG Signal Vector –– Frequency range option 503 or
Analyzer 506
–– Baseband generator option 651
or 652
Keysight IO Libraries Suite Version 16.2.xx or later
Keysight N1918A Power Analysis
Power Analyzer (R03.05.xx or later)
Manager
To download and update the instrument firmware or software, please visit:
www.keysight.com/find/usbpeaksensor
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.
BNC-SMB cable
Event 1
Trig In
USB Mini-B
N5182A MXG Signal Generator U2021XA Series Laptop
cable
USB Power Sensor
Figure 1. Laptop, U2021XA and MXG signal generator setup diagram
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
2
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
3
Demonstration 1
Average Power Measurement in Compact Mode Display
In this guide, keystrokes surrounded by [ ] represent front panel keys of the
Objectives
instruments, keystrokes surrounded by { } represent softkeys of the instrument,
To demonstrate the capabil- and keystrokes in bold represent the softkeys of the software.
ity of the Power Analyzer to
perform power measurement
and switch the measurement Instructions Keystrokes
display to compact mode. On the MXG
1. Set instrument to its default
Press [Preset]
settings
2. Set the frequency and ampli-
tude –– Press [Frequency] [1] {GHz}
Frequency = 1 GHz –– Press [Amplitude] [0] {dBm}
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.
(Note: The latest version of Power
Analyzer demonstrated in this demo
4. Run the Power Analyzer guide will start the measurement upon
running of the
application software)
–– Click {channel} on the Instrument
5. Set the frequency to 1 GHz Navigator panel
(See Figure 2) –– Set Frequency (Hz) to “1G” on the
Instrument Properties panel
–– Move the cursor to highlight
6. Switch the normal mode dsplay instrument measurement 1
to compact mode (See Figure 3) –– Click Switch { } the Power
Analyzer toolbar
7. Switch the compact mode
Click Switch { } on the Power Ana-
to normal mode display (soft
lyzer
panel)
8. Stop the measurement Click Stop { } on the Power Analyzer
4
Figure 2. Average power measurement shown in normal mode display (soft panel)
Figure 3. Compact mode display show the average power
measurement
5
Demonstration 2
Enable Alert, Limit, and Recording using Power Analyzer
Objectives Instructions Keystrokes
(Continue from Demo 1)
–– To demonstrate the alert func-
On the MXG
tions where the system will
notify you the exact time and 1. Set amplitude power to 0.1 dBm Press [Amplitude], [0.1], {dBm}
date the power measurements
of your DUT has exceeded In the Power Analyzer
the specified upper and lower
limits. Alert functions are es- –– Click Create Strip Chart { } on
Power Analyzer toolbar.
pecially useful for applications 2. Add strip chart display
such as aging and reliability –– Select “Meas ID” and “Current
text where long test times are Active Tab”, then click “OK”
required.
–– To demonstrate the strip chart –– Click Stop { } on the Power
function in the Power Analyzer Analyzer toolbar
application software, which –– Move the cursor to highlight
allows the user to monitor, re- normal mode display
cord, and playback the power 3. Delete the normal mode display
measurements tend for a long –– Click { } to delete normal
period of time. mode display
–– Click Run { } to continue
the measurement
–– Click {Measurements} on the
4. Enable limit and alert of Instrument Navigator panel
measurement (See Figure 4) –– In Instrument Properties panel,
Upper Limit = 0.1 dB check “Enable Alert”
Lower Limit = –0.1 dB –– Set Upper Limit to “0.1” and Lower
Limit to “–0.1”
–– Click Stop { } on the Power
Analyzer toolbar
–– Move the cursor to highlight
normal mode display
–– Click Recorder { } on the Power
5. Enable recording function Analyzer toolbar.
(See Figure 6) –– 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”
6
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
7
Demonstration 3 Instructions Keystrokes
On the MXG
Pulse Power Measurement 1. Set instrument to its default
Press [Preset]
settings
Objectives 2. Set the frequency and ampli-
tude –– Press [Frequency] [1] {GHz}
–– To demonstrate the capability Frequency = 1 GHz –– Press [Amplitude] [0] {dBm}
of the U2021XA Series USB Amplitude = 0 dBm
power sensors to obtain
–– {Pulse Period}, [40], {μsec}
15-point pulse parameter 3. Set the pulse signal
–– {Pulse Width}, [10], {μsec}
values from the trace graph,
where the parameters values 4. Activate the pulse signal Toglle {Pulse On/Off} to “On”
are automatically 5. Turn on the RF Output Toglle [RF On/Off] to “On”
calculated by the Power In the Power Analyzer
Analyzer application software
Double-click on Power Analyzer
whenever a trace pattern
application software shortcut on your
appears on the graph. 6. Run the Power Analyzer
desktop or access the program via the
–– To demonstrate the capability Windows Start menu.
of the dual gates feature to
–– Click {channel} on the Instrument
measure the pulse width Navigator panel.
7. Set the frequency to 1 GHz
and pulse period signal
(See Figure 7) –– Set Frequency (Hz) to “1G” on the
respectively.
Instrument Properties panel.
–– In this demo, pulse signal with
pulse period 40 μs and pulse
–– Click { } on the Power
width 10 μs will be generated
8. Add trace graph display Analyzer toolbar.
from the signal generator.
–– Select “Meas ID” and “Current
The U2021XA Series USB
power sensors measures the Active Tab” then click “OK”.
average, peak, and peak-to-
–– Click Stop { } on the Power
average of the pulse signal via
Analyzer toolbar
the dual gated feature.
–– Move the cursor to highlight the
9. Delete the normal mode display normal mode display and click {
} to delete the normal mode
display.
–– Click Run { } to continue the
measurement.
Measure Pulse Width Signal
Move the cursor to highlight the trace
graph display. Right-click on the trace
10. Add dual gates to measure
graph display and select “Apply Gate
pulse width signal, 10 μs (See
Option”, Gate 1. Move the dual gated
Figure 8)
(vertical line) to the highlighted pulse
width duration.
Measure Pulse Period Signal
Move the cursor to highlight the trace
graph display. Right-click on the trace
11. Add dual gates to measure
graph display and select “Apply Gate
pulse period signal, 40 μs (See
Option”, Gate 2. Move the dual gated
Figure 9)
(vertical line) to the highlighted pulse
width duration.
In the Measurement Panel (bottom of
the trace graph display), click “Mea-
12. Add 15-point pulse parameter
surement Selector”, then check “Select
values from the trace graph
All” under Pulse Measurement menu,
display (See Figure 10)
and click
“Apply”.
8
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
9
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.
10Demonstration 4
Burst Power Measurement
Objectives 4.613 ms timeframe duration
–– 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
577 μs timeslot duration
automatically calculated by
Power Analyzer application Figure 11. GSM timeslot pattern with timeslot 0 on
software whenever a burst
waveform appears on the
Instructions Keystrokes
graph.
–– To demonstrate the capability On the MXG
of the dual gates function to 1. Set instrument to its default
Press [Preset]
measure the burst signal. settings
–– In this demo, GSM burst 2. Set the frequency and ampli-
signal with 4.613 ms duration tude –– Press [Frequency] [1] {GHz}
(consists of 8 timeslots and Frequency = 1 GHz –– Press [Amplitude] [0] {dBm}
each timeslot with 577 μs Amplitude = 0 dBm
duration) will be generated –– Press [Mode], {Dual ARB},
from the signal generator (See {Select Waveform}, {Waveform
Figure 11). 3. Recall GSM modulation signal Segments}
–– Using external triggering from –– Press [ ] or [ ] to select
Event 1 of signal generator, to {GSM_BURST_WFM}
synchronize with the U2021XA –– Press [Mode], {Dual ARB},
USB power sensors via Trig {Select Waveform}
In port before starting to
–– Press [ ] or [ ] to highlight
capture GSM waveform for 4. Set GSM modulation signal {GSM_BURST_WFM}
measuring the average, peak
–– Press {Select Waveform} and
and peak-to-average power
(see Figure 1). toggle {ARB ON/Off} to “On”
Press [Mode], {Dual ARB} and [More],
5. Set external triggering for GSM
{Marker Utilities}, {Route Connectors},
modulation signal
{Route to Event 1 BNC} and {Marker 2}
6. Turn on the RF Output Toggle [RF On/Off] to “On”
11Instructions Keystrokes
In the Power Analyzer
Double-click on the Power Analyzer
application software shortcut on the
1. Run the Power Analyzer
desktop or access the program via the
Windows Start menu
–– Click {Channel} on the Instrument
Navigator panel
2. Set the frequency to 1 GHz
–– Set Frequency (Hz) to “1G” on the
Instrument Properties panel
–– Click { } on the Power
3. Add trace graph display Analyzer toolbar.
–– Select “Meas ID” and “Current
Active Tab” then click “OK”
–– Press Stop { } on the Power
Analyzer toolbar.
–– Move the cursor to highlight the
normal mode display.
4. Delete the normal mode display
–– Click { } to delete the normal
mode display.
–– Click Run { } continue the
measurement.
–– Click {Channel} on the Instrument
5. Configure trace display to cap- Navigator panel
ture GSM 4.613 ms waveform –– Set Trace Start (s) to “–100μ” and
Trace Length (s) to “5m”
–– Click {Trigger}
6. Configure power sensor to
–– Set “Global Trigger Source” to
external triggering mode
“External”
Measure GSM Timeslot 0 Time-Gated Signal (Average, Peak, and Peak-to-Average
Power)
–– Move the cursor to highlight the
trace graph display
–– Right-click on the trace graph
7. Add dual gates to measure GSM display and select “Apply Gate
timeslot 0 duration (See Figure Option”
12). 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)
–– Move the cursor to highlight the
trace graph display
–– Right-click on the trace graph
8. Add dual gates to measure GSM
display and select “Apply Gate
whole waveforms (See Figure
Option”
13).
and “Gate 2”
–– Move the dual gated (vertical line)
to highlight the GSM waveform
12Figure 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
13Demonstration 5
Time-Gated CCDF and Waveform CCDF Measurements
Complementary Cumulative Distribution Function (CCDF)
Objectives
–– To demonstrate the A CCDF curve is defined by how much time the waveform spends at or above a
capability of U2021XA given power level. This is expressed in dB relative to the average power.
Series USB power sensors to A CCDF curve is a plot of relative power levels versus probability where the
measure and compute time- X-axis represents the dB above the average signal power, while the Y-axis
gated CCDF and waveform represents the percent of time the signal spends at or above the power level
CCDF measuremenet in trace specified by the X-axis.
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.
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
Waveform CCDF
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).
Time-Gated 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.
14Instructions Keystrokes
(Continue on from Demo 4)
In the Power Analyzer
–– Move the cursor to highlight the
trace graph display.
–– Right-click on the trace graph
1. Delete GSM waveform dual gated display and select “Apply Gate
measurement Option” and “Gate 2”
–– Gate 2 measurement will disap-
pear and be removed from the
trace display
–– Click CCDF graph { } on the
Power Analyzer toolbar. Select
“Meas ID” and “Current Active
Tab”
2. Create time-gated CCDF graph
–– Click “OK”
–– In CDDF Type Selector menu, click
“Gated CCDF”
–– Click “OK”
Measure Time-Gated CCDF
–– Move the cursor to highlight the
Gated CCDF graph display.
3. Apply Gate 1 signal into Time-Gat- –– Right-click the graph display,
ed CCDF graph (See Figure 15) select “Couple to Measurement
Gate”
and “Gate 1”.
Measure Waveform CCDF
–– Move the cursor to highlight the
4. Move Gate 1 (marker 1 and 2) to trace display graph.
measure waveform CCDF graph –– Move the “Gate 1” dual gated
(See Figure 16). (vertical line) to highlight the GSM
whole waveform signal.
15Figure 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
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
16Ordering 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
1718 | Keysight | U220 X-Series USB Peak and Average Power Sensors - Demo Guide
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Published in USA, December 1, 2017
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