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Chapter 4 Measurements

Step 5. Disconnect the Tx (Transmit) coax from System 1 and connect it to the RF Out port of the Site Master.

Step 6. Disconnect the Rx (Receive) coax from System 2 and connect it to the RF In port of the Site Master.

Step 7. Adjust the scale, either manually or by using the AUTO SCALE key, to display the isolation level in the center of the display.

Step 8. Press the MARKER key and set markers M1 and M2 to identify the receive band of the amplifier.

Step 9. Press the LIMIT key and set the limit line to the estimated average signal level. Figure 4-17displays a typical antenna isolation measurement display.

R x	Gain/Insertion Loss

R F In p u t
T x
R F O u tp u t	A n ten n a
	A n ten n a
Site Master S251C	Is o latio n
	L ev el
S ite Mas ter S 251C	R x

Figure 4-17. Typical Antenna Isolation Measurement Display

Typical antenna-to antenna isolation measurements are made between –50 dB and –100 dB below the 0 dB reference line established by the 2-port calibration.

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Contents Site Master Model S251C Antenna Cable Analyzer Page Warranty Page Table of Contents Cable & Antenna Analysis Iii/iv Standard Accessories IntroductionDescription 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 ERRORD2Charging 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 CalibrationCalibration Procedure Single Port CalibrationCalibration Procedure Dual Port RF in Test Port RF OUT Test PortSetting the Scale Save and Recall a SetupSave and Recall a Display Recalling a Display Set 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 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 SettingUsing Software Tools Interface Cable InstallationDownloading Traces from the Site Master 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