Anritsu S251C manual Insertion Loss Measurement, Procedure Cable Loss Mode

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Chapter 4 Measurements

Insertion Loss Measurement

The transmission feed line insertion loss test verifies the signal attenuation level of the ca- ble system in reference to the specification. This test can be conducted with the Site Master in either FREQ–CABLE LOSS or FREQ–RETURN LOSS mode. In Cable Loss mode, the Site Master automatically considers the signal traveling in both directions when calculating the insertion loss, making the measurement easier for the user in the field. Both methods are explained below.

Required Equipment

Site Master Model S251C

Precision Open/Short, Anritsu 22N50 or Precision Open/Short/Load, Anritsu OSLN50LF

Precision Load, Anritsu SM/PL

Test Port Extension Cable, Anritsu 15NNF50-1.5C

Optional 510-90 Adapter, DC to 7.5 GHz, 50 ohm, 7/16(F)-N(M)

Device Under Test

Transmission Feed Line with Short

Procedure - Cable Loss Mode

Step 1. Press the MODE key.

Step 2. Select FREQ-CABLE LOSS using the Up/Down arrow key and press ENTER. Step 3. Set the start and stop frequencies, F1 and F2, as described on page 3-2.

Step 4. Connect the Test Port Extension cable to the RF Out port and calibrate the Site Master as described on page 3-2.

Step 5. Save the calibration set up (page 3-5).

Step 6. Connect the Device Under Test to the Site Master phase stable Test Port Exten- sion cable. A trace will be displayed on the screen as long as the Site Master is in sweep mode.

Step 7. Press the AMPLITUDE key and set the TOP and BOTTOM values of the dis- play. In the example below, the TOP is set to 2, and the BOTTOM is set to 5.

Step 8.

Step 9.

Step 10.

Step 11.

Step 12.

Step 13.

Press the MARKER key.

Set M1 to MARKER TO PEAK.

Set M2 to MARKER TO VALLEY.

Calculate the measured insertion loss by averaging M1 (marker to peak) and M2 (marker to valley) as follows:

Insertion Loss M1 M2

2

Press SAVE DISPLAY (page 3-5) name the trace, and press ENTER.

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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 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 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