Anritsu S114C, S113C, S332C, S331C manual Appendix B Windowing, Introduction, Examples

Page 90

Appendix B

Windowing

Introduction

The Distance sub-menu (page 2-10) provides for setting the cable loss and relative propaga- tion velocity of the coaxial cable. The WINDOW key opens a menu of FFT windowing types for the DTF calculation.

The theoretical requirement for inverse FFT is for the data to extend from zero frequency to infinity. Side lobes appear around a discontinuity due to the fact that the spectrum is cut off at a finite frequency. Windowing reduces the side lobes by smoothing out the sharp transi- tions at the beginning and at the end of the frequency sweep. As the side lobes are reduced the main lobe widens thereby reducing the resolution.

In situations where there may be a small discontinuity close to a large one, side lobe reduc- tion windowing should be used. When distance resolution is critical windowing can be re- duced.

Examples

The types of windowing in order of increasing side lobe reduction are: rectangular, nominal side lobe, low side lobe, and minimum side lobe. Figures B-1 thru B-4 show examples of the types of windowing.

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Figure B-1. Rectangular Windowing Example

B-1

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Contents Users Guide Warranty Page Table of Contents Power Measurement Iii/iv Page Introduction Standard AccessoriesChapter General Information DescriptionOptional Accessories OptionsPerformance Specifications Description Site Master Spectrum Analyzer Preventive Maintenance CalibrationAnnual Verification InstaCal ModuleAnritsu Service Centers Test Connector Panel Chapter Functions and OperationsFront Panel Overview Active Function Block Soft KeysFunction Hard Keys ModeKeypad Hard Keys ClearAuto Soft Keys MODE=FREQ FREQ/DIST SoftkeysMODE=DTF FREQ/DIST Softkeys MODE=SPECTRUM Analyzer FREQ/DIST Amplitude Softkeys Power Monitor Mode Soft Key Labels Functions and Operations Functions and Operations Amplitude RUN/HOLD button Functions and Operations Power Monitor Menu Functions and Operations Limit SYS Self Test Errors SymbolsError Codes Self TestError Message Range Errors ERRORD2InstaCal Error Messages InstalledError MessageDescription Charging the Battery in the Site Master Battery InformationCharging a New Battery Charging the Battery in the Optional ChargerBattery Charge Indicator Battery LifeImportant Battery Information Power On Procedure Chapter Getting StartedSelect the Frequency or Distance CalibrationTrace Characteristics in Return Loss Mode Calibration VerificationManual Calibration Procedure CalibrationInstaCal Module Verification Termination MethodOffset Method InstaCal Module Calibration Procedure Calibration with the Test Port Extension CableSaving a Setup Setting the ScaleSave and Recall a Setup Auto ScaleSaving a Display Recalling a SetupSave and Recall a Display Recalling a DisplaySet the Distance and Cable Type Changing the UnitsChanging the Display Language Printing Printing a ScreenPrinter Switch Settings PrinterUsing the Soft Carrying Case Using the Site Master Soft Carrying CaseChapter Cable & Antenna Measurements Line Sweep FundamentalsInformation Required for a Line Sweep Cable & Antenna MeasurementsTypical Line Sweep Test Procedures System Return Loss MeasurementProcedure Cable Loss Mode Insertion Loss MeasurementSet M1 to Marker to Peak Set M2 to Marker to Valley Procedure Return Loss Mode Typical Transmission Line Cable Loss TraceTypical Return Loss Trace Distance-To-Fault DTF Transmission Line Test Procedure DTF-SWR Mode Shows an example of a typical DTF return loss traceAntenna Subsystem Return Loss Test 11/4-12 Page Chapter Spectrum Analyzer Measurements Occupied BandwidthChannel Power Measurement Channel Power Measurement with the Site MasterProcedure Adjacent Channel Power Measurement Example Acpr SpecificationCW Wave Out-of-Band Spurious Emission Measurements In-Band/Out-of-Channel Measurements Field Strength Measurement Antenna Calculations VdBV PdBmPage Chapter Power Measurement Power MeasurementDisplaying Relative Power Features Chapter Site Master Software ToolsSystem Requirements Installation Communication Port SettingUsing Software Tools Interface Cable InstallationDownloading Traces from the Site Master Plot Properties Display ModePlot Capture Graph TitlesMarkers Trace Overlay or Plot OverlaySaving Traces MiscCustom Cable List Saving a Plot to a SpreadsheetCreating a Custom Cable List Entering Antenna Factors Uploading a Cable ListQuerying the Site Master Cable List Uploading Antenna Factors Creating a DatabasePrinting Formats Coaxial Cable Technical Data Appendix a Reference DataAppendix a Reference Data A-4 Page Appendix B Windowing IntroductionExamples Appendix B Windowing B-4 Page

S113C, S332C, S114C, S331C specifications

Anritsu, a leader in test and measurement solutions, offers a range of handheld tools that cater to the needs of professionals in the RF and microwave industries. Among these tools are the Anritsu S331C, S114C, S332C, and S113C, each designed with unique features and technologies that make them suitable for various applications.

The Anritsu S331C is a Cable and Antenna Analyzer that is particularly valued for its accuracy and ease of use. It operates within a frequency range of 3 MHz to 4 GHz, making it applicable for both wireless and microwave communication systems. One of its standout features is the built-in Time Domain Reflectometry (TDR) function, which allows technicians to pinpoint faults in cables quickly. The S331C's intuitive touch-screen interface ensures seamless operation, while its lightweight design allows for portability in the field.

On the other hand, the Anritsu S114C is a versatile handheld RF power meter that can measure a wide range of power levels and frequencies. Its exceptional measurement accuracy and broad dynamic range make it suitable for various applications, from network testing to maintenance. It supports both peak and average power measurements, providing users with the flexibility to adapt to different testing scenarios. The S114C also features a memory function that allows users to store and recall measurement data easily.

The S332C model is designed for more advanced applications, offering vector network analysis capabilities. Operating within a frequency range of 5 kHz to 4 GHz, it is used for characterizing components such as filters, amplifiers, and cables. The S332C features a high-resolution display and supports automated measurements, making it a powerful tool for engineers involved in the design and validation of RF components.

Lastly, the Anritsu S113C is an excellent choice for professionals requiring a compact and efficient solution for insertion loss and return loss measurements. This analyzer covers a frequency range of 5 kHz to 4 GHz and is especially suited for testing antennas and RF components. The S113C's lightweight design, combined with its user-friendly interface, allows operators to conduct measurements easily in various environments, ensuring high performance and reliability.

In summary, the Anritsu S331C, S114C, S332C, and S113C represent a comprehensive suite of handheld analyzers that cater to diverse needs in the RF and microwave sectors. With features like TDR function, RF power measurements, vector network analysis, and a focus on portability, these instruments are essential tools for professionals looking to enhance their testing capabilities and ensure high-quality network performance.
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