Anritsu S331C, S113C, S332C Information Required for a Line Sweep, Cable & Antenna Measurements

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Chapter 4 Cable & Antenna Measurements

The performance of a transmission feed line system may be effected by excessive signal re- flection and cable loss. Signal reflection occurs when the RF signal reflects back due to an impedance mismatch or change in impedance caused by excessive kinking or bending of the transmission line. Cable loss is caused by attenuation of the signal as it passes through the transmission line and connectors.

To verify the performance of the transmission feed line system and analyze these problems, three types of line sweeps are required:

Return Loss Measurement￿Measures the reflected power of the system in decibels (dB). This measurement can also be taken in the Voltage Standing Wave Ratio (VSWR) mode, which is the ratio of the transmitted power to the reflected power. However, the return loss measurement is typically used for most field applications.

Insertion Loss Measurement￿Measures the energy absorbed, or lost, by the transmission line in dB/ft or dB/meter. Different transmission lines have different losses, and the loss is frequency and distance specific. The higher the frequency or longer the distance, the greater the loss.

Distance-To-Fault (DTF) Measurement￿Reveals the precise fault location of compo- nents in the transmission line system. This test helps to identify specific problems in the system, such as connector transitions, jumpers, kinks in the cable or moisture intrusion.

The different measurements are defined as:

Return Loss - System Sweep￿A measurement made when the antenna is connected at the end of the transmission line. This measurement provides an analysis of how the various components of the system are interacting and provides an aggregate return loss of the entire system.

Distance To Fault - Load Sweep￿A measurement made with the antenna disconnected and replaced with a 50￿ precision load at the end of the transmission line. This measure- ment allows analysis of the various components of the transmission feed line system in the DTF mode.

Cable Loss - Insertion Loss Sweep￿A measurement made when a short is connected at the end of the transmission line. This condition allows analysis of the signal loss through the transmission line and identifies the problems in the system. High insertion loss in the feed line or jumpers can contribute to poor system performance and loss of coverage.

This whole process of measurements and testing the transmission line system is called Line Sweeping.

Information Required for a Line Sweep

The following information must be determined before attempting a line sweep measure- ment:

￿System Frequency Range, to set the sweep frequency

￿Cable Type, to set the cable characteristics for DTF measurements

￿Distance of the Cable Run, to set the distance for DTF measurements

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Contents Users Guide Warranty Page Table of Contents Power Measurement Iii/iv Page Description Standard AccessoriesChapter General Information IntroductionOptions Optional AccessoriesPerformance Specifications Description Site Master Spectrum Analyzer Calibration Preventive MaintenanceInstaCal Module Annual VerificationAnritsu Service Centers Chapter Functions and Operations Test Connector PanelActive Function Block Soft Keys Front Panel OverviewMode Function Hard KeysClear Keypad Hard KeysAuto MODE=FREQ FREQ/DIST Softkeys Soft KeysMODE=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 SymbolsError Codes Self Test ErrorsError Message ERRORD2 Range ErrorsInstalled InstaCal Error MessagesError MessageDescription Charging the Battery in the Optional Charger Battery InformationCharging a New Battery Charging the Battery in the Site MasterBattery Life Battery Charge IndicatorImportant Battery Information Chapter Getting Started Power On ProcedureCalibration Select the Frequency or DistanceCalibration Verification Trace Characteristics in Return Loss ModeCalibration Manual Calibration ProcedureTermination Method InstaCal Module VerificationOffset Method Calibration with the Test Port Extension Cable InstaCal Module Calibration ProcedureAuto Scale Setting the ScaleSave and Recall a Setup Saving a SetupRecalling a Display Recalling a SetupSave and Recall a Display Saving a DisplayChanging the Units Set the Distance and Cable TypeChanging the Display Language Printing a Screen PrintingPrinter Printer Switch SettingsUsing the Site Master Soft Carrying Case Using the Soft Carrying CaseLine Sweep Fundamentals Chapter Cable & Antenna MeasurementsCable & Antenna Measurements Information Required for a Line SweepSystem Return Loss Measurement Typical Line Sweep Test ProceduresInsertion Loss Measurement Procedure Cable Loss ModeSet M1 to Marker to Peak Set M2 to Marker to Valley Typical Transmission Line Cable Loss Trace Procedure Return Loss ModeTypical Return Loss Trace Distance-To-Fault DTF Transmission Line Test Shows an example of a typical DTF return loss trace Procedure DTF-SWR ModeAntenna Subsystem Return Loss Test 11/4-12 Page Occupied Bandwidth Chapter Spectrum Analyzer MeasurementsChannel Power Measurement with the Site Master Channel Power MeasurementProcedure Example Acpr Specification Adjacent Channel Power MeasurementCW Wave Out-of-Band Spurious Emission Measurements In-Band/Out-of-Channel Measurements Field Strength Measurement VdBV PdBm Antenna CalculationsPage Power Measurement Chapter Power MeasurementDisplaying Relative Power Chapter Site Master Software Tools FeaturesSystem Requirements Communication Port Setting InstallationInterface Cable Installation Using Software ToolsDownloading Traces from the Site Master Graph Titles Display ModePlot Capture Plot PropertiesMisc Trace Overlay or Plot OverlaySaving Traces MarkersSaving a Plot to a Spreadsheet Custom Cable ListCreating a Custom Cable List Uploading a Cable List Entering Antenna FactorsQuerying the Site Master Cable List Creating a Database Uploading Antenna FactorsPrinting Formats Appendix a Reference Data Coaxial Cable Technical DataAppendix a Reference Data A-4 Page Introduction Appendix B WindowingExamples 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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