Choose a country or area to be content specific to your location

    Aktivieren Sie Browser-Cookies, damit Sie die Funktionen der Webseite optimal nutzen können.
    Keysight Technologies
    Toggle Menu
    Chat Live
    Contact Us
    Welcome

    Willkommen

    • Mein Profil
    • Abmelden
    • Login
    • Registrieren
    Quote
    Deutschland

    Bestätigen Sie Ihr Land oder Gebiet

    Deutschland

    • 中国
    • 日本
    • 繁體中文
    • 한국
    • Россия
    • Brasil
    • Canada
    • Deutschland
    • France
    • India
    • Malaysia
    • United Kingdom
    • United States
    • Australia
    • Austria
    • Belgium
    • Denmark
    • Finland
    • Hong Kong, China
    • Ireland
    • Israel
    • Italy
    • Mexico
    • Netherlands
    • Singapore
    • Spain
    • Sweden
    • Switzerland (German)
    • Thailand
    • Mehr...

    Bitte bestätigen

    Bestätigen Sie Ihr Land, damit Sie die für Sie zutreffenden Informationen über Preise, Sonderangebote, Veranstaltungen und Kontaktdaten erhalten.

    • Produkte & Service
      • Oszilloskope & Analysatoren
        • Oszilloskope
        • Spektrumanalysatoren (Signalanalysatoren)
        • Netzwerkanalysatoren
        • Logic Analyzers
        • Protocol Analyzers and Exercisers
        • Bitfehlerraten-Tester
        • Noise Figure Analyzers + Noise Sources
        • High-Speed Digitizers and Multichannel Data Acquisition Solutions
        • AC Power Analyzers
        • DC-Leistungsanalysatoren
        • Materials Test Equipment
        • Device Current Waveform Analyzers
        • Parameter and Device Analyzers, Curve Tracers
      • Meters
        • Digitalmultimeter (DMM)
        • Phase Noise Measurement
        • Power Meters + Power Sensors
        • 53200 Series RF and Universal Frequency Counter / Timers
        • LCR Meters and Impedance Measurement Products
        • B2980 Series Femto / Picoammeter and Electrometer Meters
      • Signalgeneratoren, Quellen & Stromversorgung
        • Signal Generators (Signal Sources)
        • Signal- und Funktionsgeneratoren
        • Arbiträrsignalgeneratoren
        • Pulse Generator Products
        • HEV/EV/Netz-Emulatoren und Testsysteme
        • DC Power Supplies
        • Source Measure Units
        • DC Electronic Load
        • AC Power Sources
      • Software
        • Application Software Testing
        • PathWave Design Software
        • PathWave Test-Software
        • Application Software
        • Productivity Software
        • Software Enterprise Agreement
        • All Design + Test Software  
      • Mobilfunk und andere Wireless-Technologien
        • Wireless Network Emulators
        • Channel Emulators
        • Nemo Wireless Network Solutions
        • 5G OTA Chambers
        • Wireless Analyzers
        • Lösungen zur Einhaltung von IoT-Vorschriften
      • Modulare Messgeräte
        • PXI Products
        • AXIe Products
        • Datenerfassung – DAQ
        • USB Products
        • VXI Products
        • Reference Solutions
        • All Modular Instruments  
      • Netzwerk-Test
        • Protocol and Load Test
        • Netzwerk-Test-Hardware
        • Cloud Test
        • Performance Monitoring
        • Test für 5G-NR-Basisstationen
        • Radio Access and Core Network Test
        • Network Modeling
        • All Network Test  
      • Network Security + Visibility
        • Network Packet Brokers
        • Cloud Visibility
        • Netzwerk-Taps
        • Bypass Switches
        • Netzwerksicherheit
        • Application and Threat Intelligence
      • Additional Products
        • In-circuit Test Systems
        • Application-Specific Test Systems And Components
        • Parametric Test Solutions
        • Photonic Test & Measurement Products
        • Laser Interferometers and Calibration Systems
        • Monolithic Laser Combiners & Precision Optics
        • MMIC Millimeter-Wave and Microwave Devices
      • Service
        • KeysightCare Service and Support
        • KeysightAccess Service
        • Kalibrier-Services
        • Reparatur-Services
        • Technology Refresh Services
        • Test as a Service (TaaS)
        • Network/Security Services
        • Consulting Services
        • Financial Services
        • Education Services
        • Keysight Support Portal
        • Used Equipment
        • All Services  
      • All Products, Software, Services  
    • Lösungen
      • 5G
      • Cloud
      • Vernetzte Fahrzeuge
      • Rechenzentrums-Infrastruktur
      • Entwicklung + Automatisierung
      • Zukünftige Technologien
      • Ökosystem Energie
      • Entwicklung digitaler Hochgeschwindigkeits-Systeme
      • Internet der Dinge
      • Fertigungstest
      • Messtechnikgrundlagen
      • Netzwerksicherheit
      • Netzwerktest
      • Netzwerktransparenz
      • SDN, NFV, Virtualisierung
      • Software-Test-Automatisierung
      • All Solutions  
    • Branchen
      • Luft- und Raumfahrt & Verteidigung
      • Automobil & Energie
      • Kommunikationstechnik
      • Ausbildung
      • Unternehmen
      • Behörden
      • Halbleiterindustrie
      • Dienstleister
      • All Industries + Technologies  
    • Insights
      • Discover Insights
      • Erfolgsgeschichten
      • Blog
      • Keysight University
    • Ressourcen
    • Buy
    • Support
      • Keysight Produkt-Support
      • Ixia Produkt-Support
    No product matches found - System Exception
    Tips for Querying CW and Average Power
    Application Notes

    Tips for Querying CW and Average Power

    Show Description

    Introduction

    This application note applies to the following products from Keysight Technologies

    • N1913/14A EPM power meter
    • E4416/17A EPM-P power meter
    • N1911/12A P-Series power meter
    • U2020 X-Series USB Peak and average power sensor
    • U2000A Series USB average power sensor
    • U8480A USB Thermocouple USB power sensor
    • Keysight power sensors

    This application brief demonstrates the capabilities Keysight Technologies, Inc. power meters and power sensors have for measuring CW and average power signals. It also explains the advantages and disadvantages of selecting SCPI commands and settings for Keysight power meters and power sensors, illustrating how to these items to improve power measurement speed without compromising measurement accuracy.

    Table of Content

    • Power measurements
    • Querying tips
    • Power sensor measurement speed
    • Test configuration and SCPI commands

    Power measurements

    There are many ways to analyze a modulated signal. The power-versus-time measurement is a very useful method for examining power level changes due to pulsed or burst carriers.

    Average, pulse, and peak envelope power measurements provide different types of information about the signal.

    Pulse power is determined by measuring the average power of the pulse and then dividing the result by the pulse duty cycle. This is a mathematical representation of the pulse power rather than an actual measurement and assumes constant pulse power. Pulse power measurement averages out any aberrations in the pulse, such as overshoot or ringing. For this reason, it is called pulse power and not peak power or peak envelope power. To ensure accurate pulse power readings, the modulating signal must be a rectangular pulse with a constant duty cycle. Other pulse shapes such as triangular or Gaussian will cause erroneous results. This technique is not applicable for digital modulation systems, where the duty cycle is not constant, and the pulse amplitude and shape vary.

    When the power pulse becomes non-rectangular and the pulse-power measurement equations become inaccurate, using peak envelop power measurements is a better measurement method. This technique is the most suitable for modern digital communication systems with variable duty cycles and pulse widths.

    Unlike measuring a pulsed signal that has a pulse repetition period and a constant duty cycle, burst signal measurement is considerably more challenging. Measuring a burst signal with an unpredictable burst length that lacks a constant duty cycle requires time-gated functionality (independent measurement gates). This can be accomplished using high-performance power meters and power sensors.

    Keysight power meters and power sensors offer the ability to measure CW and average power. The following example provides some tips for using power meters and power sensors to acquire accurate power without increasing the test time.

    Querying tips

    Measurement query method

    There are three different methods that can be used to query a measurement from the power meter or power sensor. It is beneficial to understand the basic differences between these three commands in order to fully optimize measurement speed.

    MEASure?

    This command is compound command consisting of ABORt, CONFigure, and READ?. It is the simplest of the query commands because it relies on the power meter to select the best settings for the requested configuration and immediately perform the measurement. One drawback to this command is that its use results in a longer test time and overrides some of the power meter’s settings, such as switching the meter from Free Run to Single Shot mode or changing the average count set to the ON state.

    READ?

    The READ? command is another compound command that is equivalent to an ABORt followed by an INITiate and FETCH?. The READ? query is similar to MEAS? in that it causes the meter to perform initializations and auto-configuration. However, READ? gives users the flexibility to change certain settings such as the average count. The READ? command allows the user to manipulate the settings in order to optimize the measurement speed, resulting in a shorter test time than that realized using the MEAS? command.

    FETCH?

    This command retrieves a reading upon measurement completion and puts it in the output buffer. The FETCH? command allows users to manipulate settings such as the average count. However, this command requires additional settling time to complete the average count process, or else FETCH? will return invalid data.

    Möchten Sie die E-Mail-Adresse ändern?
    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Dies ist ein obligatorisches Eingabefeld

    Durch Anklicken der nachstehenden Schaltfläche übermitteln Sie Ihre persönlichen Daten an Keysight. Informationen darüber, wie wir Ihre Daten verwenden, finden Sie in der Datenschutzerklärung von Keysight. Datenschutzerklärung von Keysight.

    Besten Dank
    Download

    Erkunden

    • Produkte & Service
    • Lösungen
    • Branchen
    • Veranstaltungen
    • Keysight University

    Insights

    • Discover Insights
    • Erfolgsgeschichten
    • Ressourcen
    • Blog
    • Community

    Partner

    Support

    • Keysight Produkt-Support
    • Ixia Produkt-Support
    • Softwarelizenzen verwalten
    • Produkt Auftragsstatus
    • Teile / Ersatzteile

    Über Keysight

    • Newsroom
    • Investor Relations
    • Soziale Unternehmensverantwortung
    • Vielfalt, Gerechtigkeit und Inklusion
    • Lieferkettentransparenz
    • Karriere

    • Facebook: Connect with Keysight LinkedIn: Connect with Keysight Twitter: Connect with Keysight YouTube: Connect with Keysight WeChat: Connect with Keysight
    • © Keysight Technologies 2000–2022
    • Privacy
    • Terms
    • Feedback