Anritsu S251C 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 S251C.

Throughout this manual, the term Site Master will refer to the S251C.

Model

Frequency Range

Ports

 

S251C

625 to 2500 MHz

2

 

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. The S251C includes a keypad to enter data and a VGA (640 ￿

480)liquid crystal display (LCD) to provide graphic indications of SWR, RL (dB) over the selected frequency range and distance. The Site Master is capable of up to 2.5 hours of con- tinuous operation from a fully charged field-replaceable battery and can be operated from a 12.5 VDC source. Built-in energy conservation features can be used to extend 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 fault locations of RF components in antenna systems. Power monitoring is avail- able as an option. Site Master model S251C includes transmission gain or loss (S21) mea- surements and an optional built-in bias tee. The displayed trace can be scaled or enhanced with frequency markers or a limit lines. 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￿ 95/98/2000/ME/NT workstation graphic. Measurements stored in the Site Master internal memory can be downloaded to the PC, and vice versa, using the in- cluded null-modem serial cable. 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 can display all of the measurements made with the Site Master (SWR, return loss, cable loss, distance-to-fault) as well as providing other func- tions, such as converting display modes and Smith charts. Refer to Chapter 5, Software Tools, for more information.

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Contents Site Master Model S251C Antenna Cable Analyzer Page Warranty Page Table of Contents Cable & Antenna Analysis Iii/iv Description Standard AccessoriesIntroduction Optional Accessories OptionsPerformance Specifications Description Site Master Performance Specifications 2 Preventive Maintenance ESD PrecautionsAnnual Verification Anritsu 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 Functions and Operations Amplitude Power Monitor Menu Option MODE=POWER Monitor SoftkeysRF Source Menu MODE=RF Source SoftkeysLimit Segment 1 Segment SYS Symbols Self TestError Codes Self Test ErrorsRange Errors ERRORD2Battery Information Charging a New BatteryCharging the Battery in the Site Master Charging the Battery in the Optional ChargerBattery Charge Indicator Battery LifeImportant Battery Information Power On Procedure Chapter Getting StartedSelect the Frequency or Distance CalibrationCalibration Procedure Single Port CalibrationCalibration Procedure Dual Port RF in Test Port RF OUT Test PortSave and Recall a Display Setting the ScaleSave and Recall a Setup Recalling a Display Changing the Display Language Set the Distance and Cable TypeChanging the Units Printing Printing a ScreenPrinter Switch Settings PrinterUsing the Soft Carrying Case Using the Site Master Soft Carrying CaseOne Port Measurements Line Sweep FundamentalsInformation Required for a Line Sweep MeasurementsTypical Line Sweep Test Procedures System Return Loss Measurement2is an example of a typical system return loss trace Procedure Cable Loss Mode Insertion Loss MeasurementType Attenuation dB/ft Length ft = Loss dB Procedure Return Loss Mode Distance-To-Fault DTF Transmission Line Test Procedure DTF-Return Loss ModeProcedure DTF-SWR Mode Antenna Subsystem Return Loss Test Vswr Two Port Measurements IntroductionTMA Measurements TMA-STMA Gain Measurement After Calibration TMA-DD 12. TMA-DD Gain Measurement TMA-D 14. TMA-D Gain Measurement Antenna to Antenna Isolation 15. System IsolationQuency settings for common systems Antenna-to-Antenna Isolation Measurement21/4-22 Features System RequirementsInstallation Communication Port SettingDownloading Traces from the Site Master Using Software ToolsInterface Cable Installation Plot Capture Plot PropertiesTrace Overlay or Plot Overlay Saving TracesCustom Cable List Saving a Plot to a SpreadsheetCreating a Database Printing FormatsCoaxial Cable Technical Data Appendix a Reference DataAppendix a Reference Data A-4 Appendix B Windowing ExamplesAppendix B Windowing B-4
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