Keysight Technologies U2000 Series User manual

Keysight Technologies
N1918A Power Analysis Manager
and U2000 Series USB Power Sensors
Demo Guide

Introduction
This demonstration guide helps you to get familiar with the basic setup
and conguration requirements to perform power measurements using
the Keysight Technologies, Inc. U2000 Series USB power sensor via
Keysight N1918A Power Analysis Manager.
All demonstrations exercised in this guide require the U2000 Series bundled
application software N1918A Power Analysis Manager–Power Panel, any of
the U2000 Series USB power sensors and a Keysight ESG E4438C vector
signal generator.
This demonstration guide includes a step-by-step demonstration of basic
average and pulse measurements.

03 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
U2000 Series USB Power Sensors
The U2000 Series USB power sensors are average, wide dynamic range power
sensors that can be used with a PC or any selected Keysight USB-based instrument.
Key Features
– Performs power measurements without a power meter
– Offers a frequency range of 9 kHz to 24 GHz (sensor-dependent)
– Provides a dynamic range from –60 dBm to +44 dBm
– Offers internal zeroing capability and external calibration-free measurements
– Allow average power measurement of CW and modulated signals, including
GSM, EDGE, WLAN and WIMAXTM
Figure 2. U2000 Series USB power sensor
Figure 1. Power Panel View – graphical user interface and functions
Power Panel
The Power Panel is the basic version of the Power Analysis Manager and is bundled
with the purchase of a U2000 Series USB power sensor. The Power Panel provides an
easy-to-use GUI that offers basic features that can be found in a typical power meter.
Key Features
– Processes and displays multi-channel power measurements (with more than
10 channels simultaneously)
– Provides larger, enhanced visual display, including power versus time graph
(trend chart)
– Performs delta and ratio computations between data from two channels
– Saves and restores instrument settings
– Stores up to 10,000 measurement points
– Stores data in comma separated value (CSV) les that are compatible with
Microsoft Excel
– Provides up to 10 frequency dependent offset (FDO) tables
– Supports time-gated measurement capability
save image le
disconnect instrument
connect instrument
Menu bar
Toolbar
Instrument Navigator panel
Instrument Properties tab
Gauge View
Multi List View
Soft Panel View
start measurements
stop measurements
create Soft Panel
create Gauge
create Strip Chart
remove view
preset
save instrument settings
load instrument settings
save instrument screen
unlock local access
show error list
reset instruments
FDO table
Instrument Properties toolbar
duty cycle (%)
input frequency in MHz
channel offset (dB)

04 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
Demonstration Preparation
The following instruments and software are required in order to perform the
demonstrations illustrated in this demo guide:
– Keysight N1918A Power Analysis Manager (Power Panel)
– Keysight U2000 Series USB Power Sensors
– Keysight IO Libraries Suite
– Keysight ESG E4438C Vector Signal Generator
Product type Description
N1918A Power Analysis Manager Power Panel—Basic version
Keysight U2000 Series USB Power Sensors Any of the USB sensors—U200xA/B/H Series
Keysight ESG E4438C Vector Signal Generator E4438C rmware revision C.04.60 or later
Keysight Automation-Ready CD Keysight IO Libraries Suite 14.2 or higher
In this guide, keystrokes surrounded by [ ] represent instrument front panel keys.
Connecting and Verifying ESG and U2000 Series USB
Power Sensors
Instructions
1. Connect the USB sensor to a PC that runs the Power Analysis
Manager and the Keysight IO Libraries Suite 14.2 or higher
using the USB mini-B connector.
2. Connect the other end of the USB sensor to the ESG as shown
in Figure 3.
3. Go to Start > All Programs > Keysight IO Libraries Suite >
Keysight Connection Expert to launch the Keysight Connection
Expert application.
4. Detect and verify all connected instruments to ensure suc-
cessful connections have been established. Right-click on
each listed instrument in the Keysight Connection Expert and
send the standard *IDN? command to the instrument for
identication.
5. Once all connected instruments have been successfully veried,
launch the Power Panel to begin. Go to Start > All Programs >
Keysight N1918A Power Analysis Manager > Power Panel.
6. To start using the Power Panel, search for a connected
instrument using the options available in the Find Connected
Instrument panel.
7. Click Find to search for a connected instrument via the sup-
ported IO connectivity—GPIB, LAN, or USB options.
8. Select the USB sensor and click Connect. The Power Panel
is ready to use.
9. Select the USB sensor on the Instrument Navigator panel.
On the Instrument Properties panel, click Zero to perform
zeroing on the USB sensor.
For more information on the Power Panel installation, system
requirements, setup, and usage, visit www.keysight.com/nd/N1918A.
Figure 3. PC, ESG and USB power sensor conguration diagram
Connecting U2000
Series USB sensor to
PC using USB mini-B
connector
RF Out

05 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
Average Power Measurement Demonstration
Objective
To demonstrate the capability of the Power Panel to carry out average power
measurement using the U2000 Series USB power sensor.
Instructions
On the ESG
1. Set the instrument to default Press [Preset]
2. Set the frequency and amplitude 1. Press [Frequency] 1900 > MHz
2. Press [Amplitude] 0 > dBm
3. Turn on the RF Output Toggle [RF On/Off] to “ON”
In the Power Panel
1. Set the frequency 1. Click Channel on the Instrument
Navigator panel.
2. Set Frequency (Hz) to “1.900 G” on the
Instrument Properties panel.
2. Start the measurement
(See Figure 4)
Click on the Power Panel toolbar.
Figure 4. Setting the properties in the Power Panel for average power measurements using USB power sensor

06 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
Pulse Power Measurement Demonstration
Pulse power is determined by measuring the average power of the pulse and then
dividing the measurement results by the pulse cycle value to obtain the pulse power
reading, as expressed by the following equation:
Pp= Pavg / Duty Cycle
The measurement result is a mathematical representation of the pulse power rather
than the actual measurement with the assumption of constant peak power. To ensure
accurate pulse power readings, the input signal must be a repetitive rectangular pulse
with a constant duty cycle.
Objective
To demonstrate the capability of the Power Panel to carry out pulse power measure-
ment using the U2000 Series USB power sensor.
In this demonstration, we supplying a pulsed signal with the pulse width of 10 μs and
a pulse period or pulse repetition interval (PRI) of 40 μs. The pulse signal is set to the
power level of approximately 0 dBm. The measured average power of the signal is
–6.24 dBm (See Figure 6). The duty cycle is known to be 10 μs divided by 40 μs, which
is 25%—this value can be congured in the Power Panel. This generates a pulse reading
of –0.22 dBm (See Figure 7).
To understand what the USB power sensor does, we can look at the duty cycle calcula-
tion. The equation, Average Power = 10 log (Pulse Width/PRI), provides the difference
between average power and pulse power. The calculated value in this demonstration
shows that the average power is –6.02 dBm lower than the pulse power. The Power
Panel makes this correction to show the pulse power using the provided duty cycle.
Instructions
On the ESG
1. Set the instrument to default Press [Preset]
2. Set the frequency and amplitude 1. Press [Frequency] 1900 > MHz
2. Press [Amplitude] 0 > dBm
3. Set the pulse signal 1. Press [Pulse] Pulse Period > 40 > usec
2. Pulse Width > 10 > usec
4. Activate the pulse signal Toggle Pulse On/Off to “ON”
Power
Time
A (Pulse Width)
B (Pulse Repetition Interval)
Measured
Average Power
Duty Cycle = A
B
Figure 5. Pulse power calculation

07 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
Instructions
In the Power Panel
1. Set the frequency 1. Click Channel on the Instrument Navigator panel.
2. Set Frequency (Hz) to “1.900 G” on the Instrument
Properties panel.
2. Acquire average power measurement
(See Figure 6)
Click on the Power Panel toolbar.
3. Stop the power measurement Click the Stop button on the Power Panel toolbar.
4. Enable and set the duty cycle to 25% 1. Click Channel on the Instrument Navigator panel.
2. Select Duty Cycle checkbox.
3. Set the Duty Cycle (%) to “25.000”.
5. Start the measurement
(See Figure 7)
Click on the Power Panel toolbar.
Figure 7. Pulse power measurement with duty cycle value set to 25%
Figure 6. Average power measurement of pulse signal

08 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
Instructions
On the ESG
1. Set the instrument to default Press [Preset]
2. Set the frequency and amplitude 1. Press [Frequency] 900 > MHz
2. Press [Amplitude] 0 > dBm
3. Set GSM signal 1. Press [Mode], {Real Time TDMA}, {GSM}.
2. Toggle {GSM} to “On”.
3. Press {Data Format Framed}.
4. Turn off the Timeslot #0 1. Press {Congure Timeslot}.
2. Toggle {Timeslot} to “Off”.
5. Turn on the Timeslot #5 1. Press {Timeslot #0}, {5} and {Enter}.
2. Toggle {Timeslot} to “On”.
6. Turn on the RF signal 1. Toggle [RF On/Off] to “On”.
In the Power Panel
1. Set the frequency 1. Click Channel on the Instrument Navigator panel.
2. Set Frequency (Hz) to “900 M” on the Instrument
Properties panel
2. Set the gate 1. Click Gate on the Instrument Navigator panel.
2. Select Enable Gate to enable the gate.
3. Set gate 1 Start (s) to “2.912 m”.
4. Set Length (s) to “520 μ”.
3. Set instrument source to
external trigger
1. Click Trigger on the Instrument Navigator panel.
2. Select Cont Trig on the Instrument Properties panel.
4. Start the measurement (See Figure 8) Click on the Power Panel toolbar.
Time-Gated Average Power Measurement Demonstration
Objective
To demonstrate the capability of time-gated function to carry out average power
measurement of a 900 MHz GSM pulse using the U2000 Series power sensor.
Figure 8. Time-gated average power measurement of a GSM pulse at Timeslot #5.

09 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
References
Publication title Pub number
Application Note 1449-1: Fundamental of RF and Microwave Power
Measurements (Part 1)
5988-9213EN
Application Note 1449-2: Fundamental of RF and Microwave Power
Measurements (Part 2),
5988-9214EN
Application Note 1449-3: Fundamental of RF and Microwave Power
Measurements (Part 3)
5988-9215EN
Application Note 1449-4: Fundamental of RF and Microwave Power
Measurements (Part 4)
5988-9216EN
Application Note 64-4D: 4 Steps for Making Better Power Measurements 5989-8167EN
Product Note: Choosing the Right Power Meter and Sensors 5968-7150EN
Related Literature
Publication title Pub number
Data Sheet: N1918A Power Analysis Manager 5989-6612EN
Installation Guide: N1918A Power Analysis Manager N1918A-90002
Technical Overview: N1918A Power Analysis Manager 5989-6613AEN
Data Sheet: U2000 Series USB Power Sensor 5989-6278EN
Technical Overview: U2000 Series USB Power Sensor 5989-6279EN

10 | Keysight | N1918A Power Analysis Manager and U2000 Series USB Power Sensors - Demo Guide
This information is subject to change without notice.
© Keysight Technologies, 2017
Published in USA, December 1, 2017
5989-7083EN
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