Anritsu S251B manual Introduction, Description, Standard Accessories

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Chapter 1

General Information

Introduction

This chapter provides a description, performance specifications, optional accessories, pre-

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ventive maintenance, and calibration requirements for the Site Master model S251B.

Throughout this manual, the term Site Master will refer to the S251B.

Model

Frequency Range

Ports

 

S251B

625 to 2500 MHz

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Description

The Site Master is a hand held SWR/RL (standing wave ratio/return loss), transmission gain/loss and Distance-To- Fault (DTF) measurement instrument that includes a built-in synthesized signal source. All models include a keypad to enter data and a liquid crystal display (LCD) to provide graphic indications of SWR, RL or dB over the selected fre- quency range and SWR or RL over the selected distance. The Site Master is capable of up to 2.5 hours of continuous operation from a fully charged field-replaceable battery and can be operated from a 12.5 dc source. Built-in energy conservation features can be used to ex- tend battery life over an eight-hour work day.

The Site Master is designed for measuring SWR, return loss, or one-port cable insertion loss and locating faulty RF components in antenna systems. Power monitoring is available as an option. Site Master model S251B includes transmission gain or loss (S21) measure- ments and an optional built-in bias tee. The displayed trace can be scaled or enhanced with frequency markers or a limit line. A menu option provides for an audible “beep” when the limit value is exceeded. To permit use in low-light environments, the LCD can be back lit using a front panel key.

Standard Accessories

The Software Tools PC-based software program provides a database record for storing measurement data. Site Master Software Tools can also convert the Site Master display to a Microsoft Windows￿ 95/98/NT workstation graphic. Measurements stored in the Site Mas- ter internal memory can be downloaded to the PC using the included null-modem serial ca- ble. Once stored, the graphic trace can be displayed, scaled, or enhanced with markers and limit lines. Historical graphs can be overlaid with current data, and underlying data can be extracted and used in spreadsheets or for other analytical tasks.

The Site Master Software Tools program also performs DTF (Distance To Fault) and Fault Location.

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Contents Site Master Model S251B Antenna Cable Analyzer Warranty Page Table of Contents Cable Loss Measurement Iii/iv Introduction Standard AccessoriesDescription Options Optional AccessoriesPerformance Specifications Description Site Master Performance Specifications 2 Preventive Maintenance Annual Verification CalibrationAnritsu Service Centers Charging the Battery in the Site Master Charging a New BatteryCharging the Battery in the Optional Charger Getting Started Battery Charge IndicatorBattery Life Discharging the NiMH BatteryImportant Battery Information Getting Started Front Panel Overview Chapter Functions and OperationsRF Out Test Connector PanelClear Keypad ControlsPrint Sweep FREQ/DIST Amplitude Sweep Soft KeysMODE=POWER Monitor Softkeys FREQ/DIST Amplitudesweep ON/OFF Edit SYS Functions and Operations Back Returns to the Distance Menu Rectangular Windowing Example 11. Low Side Lobe Windowing Example Amplitude RUN/HOLD button Functions and Operations Clock Tions are Power Monitor Menu Printing a Screen PrintingPrinter Printer Switch SettingsSelf Test SymbolsSelf Test Errors Error CodesERRORD2 Range ErrorsInput Signal 16. Maximum Distance and Resolution vs Frequency Span 17. Using the Site Master Soft Carrying Case Using the Soft Carrying CaseMeasurement Functions Chapter MeasurementsCalibration Procedure Power On ProcedurePerforming a Calibration Selecting the Frequency RangeSaving the Setup Setting the Amplitude ScaleRecalling a Setup Recalling a Display From Memory Saving a Display to MemoryMeasurements Measurements Measurements SWR Return Loss and Cable Loss Measurement Device-Under-Test SpecificationProcedure Selecting the Measurement ModePerforming a Calibration Set the Amplitude Scale and Limit Line SWR or Return Loss MeasurementMeasurements 10. Cable SWR Measurement Results Setting the MarkersCable Loss Measurement Setting the Segment Limit LInes12. Cable Loss Measurement Results Loss DTF MeasurementPerforming a Calibration DTF Measurement Determining the Length of the Cable Setting the Marker13. DTF SWR Measurement Results cable length DTF Measurement Determining the quality of the cable 15. DTF SWR Measurement Results cable quality Selecting the Measurement Insertion Gain Amplifier Measurement17. Two-Port Measurement Calibration Setup Test Port Cable Optional RF in Test Port RF OUT Test Port Amplifier Gain Measurement21. Measurement Display Showing Bypass Condition Activating the Bias TeePress the Marker key to display the marker value Making Power Measurements Changing COM Port Settings-Windows 95/98/NT Communication Port SettingRequirements Software Tools Program Plot Capture Software InstallationCapture single or multiple traces to PC screen Capture multiple traces to a databaseSaving a Custom Cable List Custom Cable List Uploading and DownloadingSmith Chart Software Fault Location SoftwareProgram Operation Saving Data to a Database Pasting a Plot in Graphic or Spreadsheet For- matDrag-n-Drop Printing Appendix a Reference Data Coaxial Cable Technical DataAppendix a Reference Data

S251B specifications

The Anritsu S251B is a state-of-the-art handheld spectrum analyzer designed for wireless communication applications. This compact yet powerful device is engineered to provide engineers and technicians with versatile and reliable measurements in both field and laboratory environments. Its lightweight design, weighing under 1.5 kilograms, allows for easy portability, making it an ideal solution for on-site testing.

One of the standout features of the S251B is its frequency range, which spans from 100 kHz to 6 GHz. This broad coverage is essential for monitoring various wireless technologies, including LTE, Wi-Fi, Bluetooth, and many others. The exceptional resolution bandwidth options from 1 kHz to 1 MHz help in detecting weak signals and interference, ensuring that users can analyze signals with precision.

The S251B utilizes advanced digital signal processing (DSP) technology, which significantly enhances measurement accuracy and speed. This allows for real-time spectrum analysis, ensuring that users can quickly identify and troubleshoot issues. The device supports a range of measurement applications, including spectrum analysis, interference analysis, and channel power measurements, making it a versatile tool for many scenarios.

For ease of use, the analyzer features a bright, color display that provides clear visibility in various lighting conditions. The intuitive graphical user interface enables quick navigation through settings and configuration options. Additionally, the S251B is equipped with a long-lasting battery that provides hours of continuous operation, further enhancing its suitability for field applications.

Connectivity is another key area where the Anritsu S251B excels. It offers USB and Ethernet ports for easy data transfer and remote control capabilities. This feature is particularly useful for engineers who need to integrate the analyzer into automated testing setups or require remote access for more profound analysis.

Moreover, the S251B is designed with ruggedness in mind. It is built to withstand the challenges of field use, including dropping and exposure to various environmental conditions, ensuring reliable performance even in demanding situations.

In conclusion, the Anritsu S251B handheld spectrum analyzer combines portability, advanced measurement techniques, and durability. With its wide frequency range, user-friendly interface, and connectivity options, it is a vital tool for professionals involved in the testing and deployment of wireless communication systems. Its robust capabilities make it an impressive asset for troubleshooting, maintenance, and installation tasks in the field.
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