Antenna Subsystem Return Loss Test | Anritsu S251C manual

Chapter 4 Measurements

Antenna Subsystem Return Loss Test

Antenna Subsystem return loss measurement verifies the performance of the transmit and receive antennas. This measurement can be used to analyze the performance of the antenna before installation. The antenna can be tested for the entire frequency band, or tested to a specific frequency range. Transmit and receive frequency measurements are conducted sep- arately. The following steps explain how to measure the antenna loss in return loss mode.

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

Antenna Sub Assembly

Procedure

Step 1. Press the MODE key.

Step 2. Select FREQ-RETURN 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 port and calibrate the Site Mas- ter as described on page 3-2.

Step 5. Press SAVE SETUP and 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.

Step 7. Press the MARKER key.

Step 8. Set marker M1 to 750 MHz and M2 to 829 MHz.

Step 9. Record the lowest return loss over the specified frequency.

Step 10. Press SAVE DISPLAY (page 3-5) name the trace, and press ENTER.

4-10

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Anritsu S251C manual Antenna Subsystem Return Loss Test

Contents

Site Master Model S251C Antenna Cable Analyzer Page Warranty Page Table of Contents Cable & Antenna Analysis Iii/iv Introduction Standard AccessoriesDescription Options Optional Accessories Performance Specifications Description Site Master Performance Specifications 2 ESD Precautions Preventive Maintenance Annual Verification Anritsu Service Centers Chapter Functions and Operations Test Connector Panel Active Function Block Soft Keys Front Panel Overview Mode Function Hard Keys Clear Keypad Hard Keys Auto MODE=FREQ FREQ/DIST Softkeys Soft Keys MODE=DTF FREQ/DIST Softkeys Functions and Operations Amplitude MODE=POWER Monitor Softkeys Power Monitor Menu Option MODE=RF Source Softkeys RF Source Menu Limit Segment 1 Segment SYS Self Test Symbols Self Test Errors Error Codes ERRORD2 Range Errors Charging the Battery in the Optional Charger Battery InformationCharging a New Battery Charging the Battery in the Site Master Battery Life Battery Charge Indicator Important Battery Information Chapter Getting Started Power On Procedure Calibration Select the Frequency or Distance Calibration Calibration Procedure Single Port RF in Test Port RF OUT Test Port Calibration Procedure Dual Port Save and Recall a Setup Setting the ScaleSave and Recall a Display Recalling a Display Changing the Units Set the Distance and Cable TypeChanging the Display Language Printing a Screen Printing Printer Printer Switch Settings Using the Site Master Soft Carrying Case Using the Soft Carrying Case Line Sweep Fundamentals One Port Measurements Measurements Information Required for a Line Sweep System Return Loss Measurement Typical Line Sweep Test Procedures 2is an example of a typical system return loss trace Insertion Loss Measurement Procedure Cable Loss Mode Type Attenuation dB/ft Length ft = Loss dB Procedure Return Loss Mode Procedure DTF-Return Loss Mode Distance-To-Fault DTF Transmission Line Test Procedure DTF-SWR Mode Antenna Subsystem Return Loss Test Vswr Introduction Two Port Measurements TMA-S TMA Measurements TMA Gain Measurement After Calibration TMA-DD 12. TMA-DD Gain Measurement TMA-D 14. TMA-D Gain Measurement 15. System Isolation Antenna to Antenna Isolation Antenna-to-Antenna Isolation Measurement Quency settings for common systems 21/4-22 System Requirements Features Communication Port Setting Installation Interface Cable Installation Using Software ToolsDownloading Traces from the Site Master Plot Properties Plot Capture Saving Traces Trace Overlay or Plot Overlay Saving a Plot to a Spreadsheet Custom Cable List Printing Formats Creating a Database Appendix a Reference Data Coaxial Cable Technical Data Appendix a Reference Data A-4 Examples Appendix B Windowing Appendix B Windowing B-4