Anritsu S251C manual Type Attenuation dB/ft Length ft = Loss dB

Page 51

Chapter 4 Measurements

Step 14. Verify the measured insertion loss against the calculated insertion loss:

	Type	Attenuation (dB/ft)	Length (ft)	= Loss (dB)
First Jumper	LDF4-50A	0.0325	20	0.65

Main Feeder	LDF5-50A	0.0186	150	2.79

Top Jumper	LDF4-50A	0.0325	10	0.325

The number of connector pairs (3) times the loss per pair (in dB) equals the con- nector loss: 3 0.14 = 0.42.

The insertion loss of the transmission system is equal to:

First Jumper loss + Main Feeder Loss + Top Jumper Loss + Connector Loss = Insertion Loss

0.65

+

2.79

+

0.325

+ 0.42

= 4.19 dB

Figure 4-3is an example of a typical transmission line cable loss trace.

Figure 4-3. Typical Transmission Line Cable Loss Trace

4-6

Image 51

Contents Site Master Model S251C Antenna Cable Analyzer Page Warranty Page Table of Contents Cable & Antenna Analysis Iii/iv Standard Accessories IntroductionDescription Options Optional AccessoriesPerformance Specifications Description Site Master Performance Specifications 2 ESD Precautions Preventive MaintenanceAnnual Verification Anritsu Service Centers Chapter Functions and Operations Test Connector PanelActive Function Block Soft Keys Front Panel OverviewMode Function Hard KeysClear Keypad Hard KeysAuto MODE=FREQ FREQ/DIST Softkeys Soft KeysMODE=DTF FREQ/DIST Softkeys Functions and Operations Amplitude MODE=POWER Monitor Softkeys Power Monitor Menu OptionMODE=RF Source Softkeys RF Source MenuLimit Segment 1 Segment SYS Self Test SymbolsSelf Test Errors Error CodesERRORD2 Range ErrorsCharging the Battery in the Optional Charger Battery InformationCharging a New Battery Charging the Battery in the Site MasterBattery Life Battery Charge IndicatorImportant Battery Information Chapter Getting Started Power On ProcedureCalibration Select the Frequency or DistanceCalibration Calibration Procedure Single PortRF in Test Port RF OUT Test Port Calibration Procedure Dual 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 a Screen PrintingPrinter Printer Switch SettingsUsing the Site Master Soft Carrying Case Using the Soft Carrying CaseLine Sweep Fundamentals One Port MeasurementsMeasurements Information Required for a Line SweepSystem Return Loss Measurement Typical Line Sweep Test Procedures2is an example of a typical system return loss trace Insertion Loss Measurement Procedure Cable Loss ModeType Attenuation dB/ft Length ft = Loss dB Procedure Return Loss Mode Procedure DTF-Return Loss Mode Distance-To-Fault DTF Transmission Line TestProcedure DTF-SWR Mode Antenna Subsystem Return Loss Test Vswr Introduction Two Port MeasurementsTMA-S TMA MeasurementsTMA Gain Measurement After Calibration TMA-DD 12. TMA-DD Gain Measurement TMA-D 14. TMA-D Gain Measurement 15. System Isolation Antenna to Antenna IsolationAntenna-to-Antenna Isolation Measurement Quency settings for common systems21/4-22 System Requirements FeaturesCommunication Port Setting InstallationUsing Software Tools Interface Cable InstallationDownloading Traces from the Site Master Plot Properties Plot CaptureSaving Traces Trace Overlay or Plot OverlaySaving a Plot to a Spreadsheet Custom Cable ListPrinting Formats Creating a DatabaseAppendix a Reference Data Coaxial Cable Technical DataAppendix a Reference Data A-4 Examples Appendix B WindowingAppendix B Windowing B-4