Anritsu S251B manual DTF Measurement Determining the Length of the Cable, Setting the Marker

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Chapter 4 Measurements

DTF Measurement (Determining the Length of the Cable)

Step 15. Disconnect the Load and connect the test port extension cable to the Site Master test port.

Step 16. Connect the Short to the open end of the test port extension cable.

NOTE:

The number of data points displayed can be changed by selecting RES in the DTF AID table.

Setting the Amplitude Scale

Step 17. Press the AMPLITUDE or LIMIT key to call up the Scale Menu. Optional: Press the AUTO SCALE key to optimize the amplitude scale.

Step 18. In SWR mode, press the TOP soft key and enter 3, 0 using the keypad or Up/Down arrow key. Press ENTER to set the top scale. (In Return Loss mode, enter 0.)

Step 19. In SWR mode, press the BOTTOM soft key and enter 1 using the keypad or Up/Down arrow key. Press ENTER to set the bottom scale. (In Return Loss mode, enter 54.)

Setting the Marker

Step 20. Press the MARKER key to call up the Markers menu.

Step 21. Press the M1 soft key to select the M1 marker function. (Note: pressing the ON/OFF soft key activates or deactivates the M1 marker function.)

Step 22. Press the MARKER TO PEAK soft key to find the cable length.

Step 23. Press the BACK soft key or the ESCAPE key to return to the previous menu. Figures 4-13and 4-14show cable length displays in SWR and Return Loss modes.

NOTE:

Refer to page 4-4for instructions on saving and recalling a setup or display.

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Contents Site Master Model S251B Antenna Cable Analyzer Warranty Page Table of Contents Cable Loss Measurement Iii/iv Introduction Standard AccessoriesDescription Optional Accessories OptionsPerformance Specifications Description Site Master Performance Specifications 2 Preventive Maintenance Calibration Annual VerificationAnritsu Service Centers Charging the Battery in the Site Master Charging a New BatteryCharging the Battery in the Optional Charger Battery Charge Indicator Getting StartedBattery Life Discharging the NiMH BatteryImportant Battery Information Getting Started Chapter Functions and Operations Front Panel OverviewTest Connector Panel RF OutKeypad Controls ClearPrint Sweep Soft Keys FREQ/DIST Amplitude SweepMODE=POWER Monitor Softkeys FREQ/DIST Amplitudesweep ON/OFF Edit SYS Functions and Operations Back Returns to the Distance Menu Rectangular Windowing Example 11. Low Side Lobe Windowing Example Amplitude RUN/HOLD button Functions and Operations Clock Tions are Power Monitor Menu Printing Printing a ScreenPrinter Switch Settings PrinterSymbols Self TestError Codes Self Test ErrorsRange Errors ERRORD2Input Signal 16. Maximum Distance and Resolution vs Frequency Span Using the Soft Carrying Case 17. Using the Site Master Soft Carrying CaseChapter Measurements Measurement FunctionsPower On Procedure Calibration ProcedureSelecting the Frequency Range Performing a CalibrationSaving the Setup Setting the Amplitude ScaleRecalling a Setup Saving a Display to Memory Recalling a Display From MemoryMeasurements Measurements Measurements Device-Under-Test Specification ProcedureSelecting the Measurement Mode SWR Return Loss and Cable Loss MeasurementPerforming a Calibration SWR or Return Loss Measurement Set the Amplitude Scale and Limit LineMeasurements Setting the Markers 10. Cable SWR Measurement ResultsSetting the Segment Limit LInes Cable Loss Measurement12. Cable Loss Measurement Results DTF Measurement LossPerforming a Calibration Setting the Marker DTF Measurement Determining the Length of the Cable13. DTF SWR Measurement Results cable length DTF Measurement Determining the quality of the cable 15. DTF SWR Measurement Results cable quality Insertion Gain Amplifier Measurement Selecting the Measurement17. Two-Port Measurement Calibration Setup Amplifier Gain Measurement Test Port Cable Optional RF in Test Port RF OUT Test PortActivating the Bias Tee 21. Measurement Display Showing Bypass ConditionPress the Marker key to display the marker value Making Power Measurements Changing COM Port Settings-Windows 95/98/NT Communication Port SettingRequirements Software Tools Program Software Installation Plot CaptureCapture multiple traces to a database Capture single or multiple traces to PC screenCustom Cable List Uploading and Downloading Saving a Custom Cable ListSmith Chart Software Fault Location SoftwareProgram Operation Saving Data to a Database Pasting a Plot in Graphic or Spreadsheet For- matDrag-n-Drop Printing Coaxial Cable Technical Data Appendix a Reference DataAppendix a Reference Data

S251B specifications

The Anritsu S251B is a state-of-the-art handheld spectrum analyzer designed for wireless communication applications. This compact yet powerful device is engineered to provide engineers and technicians with versatile and reliable measurements in both field and laboratory environments. Its lightweight design, weighing under 1.5 kilograms, allows for easy portability, making it an ideal solution for on-site testing.

One of the standout features of the S251B is its frequency range, which spans from 100 kHz to 6 GHz. This broad coverage is essential for monitoring various wireless technologies, including LTE, Wi-Fi, Bluetooth, and many others. The exceptional resolution bandwidth options from 1 kHz to 1 MHz help in detecting weak signals and interference, ensuring that users can analyze signals with precision.

The S251B utilizes advanced digital signal processing (DSP) technology, which significantly enhances measurement accuracy and speed. This allows for real-time spectrum analysis, ensuring that users can quickly identify and troubleshoot issues. The device supports a range of measurement applications, including spectrum analysis, interference analysis, and channel power measurements, making it a versatile tool for many scenarios.

For ease of use, the analyzer features a bright, color display that provides clear visibility in various lighting conditions. The intuitive graphical user interface enables quick navigation through settings and configuration options. Additionally, the S251B is equipped with a long-lasting battery that provides hours of continuous operation, further enhancing its suitability for field applications.

Connectivity is another key area where the Anritsu S251B excels. It offers USB and Ethernet ports for easy data transfer and remote control capabilities. This feature is particularly useful for engineers who need to integrate the analyzer into automated testing setups or require remote access for more profound analysis.

Moreover, the S251B is designed with ruggedness in mind. It is built to withstand the challenges of field use, including dropping and exposure to various environmental conditions, ensuring reliable performance even in demanding situations.

In conclusion, the Anritsu S251B handheld spectrum analyzer combines portability, advanced measurement techniques, and durability. With its wide frequency range, user-friendly interface, and connectivity options, it is a vital tool for professionals involved in the testing and deployment of wireless communication systems. Its robust capabilities make it an impressive asset for troubleshooting, maintenance, and installation tasks in the field.
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