Anritsu S251B manual Selecting the Frequency Range, Performing a Calibration

Page 49

Chapter 4 Measurements

Step 3. Press the ENTER key to select the measurement mode.

 

LOAD

 

OPEN

TEST PORT CABLE

SHORT

(OPTIONAL)

LOAD

 

TEST PORT CABLE (OPTIONAL)

RF IN TEST PORT

RF OUT TEST PORT

Site Master S251B

1

2

START AUTO

CAL SCALE

3 4

ESCAPE

CLEAR

 

 

 

SAVE

RECALL

 

 

 

 

SETUP

SETUP

 

 

 

 

5

6

 

 

 

 

LIMIT

MARKER

 

 

 

 

7

8

ENTER

 

 

 

 

 

 

 

SAVE

RECALL

RUN

 

 

 

DISPLAY

DISPLAY

HOLD

 

 

 

9

0

+/-

625.0

 

 

2500.0

 

 

1384.45 MHz

 

 

 

 

2096.66 MHz

 

ON

PRINT

SYS

 

 

 

OFF

.

MODE

FREQ/DIST

AMPLITUDE

SWEEP

 

 

Figure 4-2. Two-Port Measurement Calibration Setup

Selecting the Frequency Range

The following procedure selects the frequency range for the calibration.

Step 4. Press the FREQ/DIST key.

Step 5. Press the F1 soft key.

Step 6. Enter 6, 2, 5 or a user-defined frequency using the key pad or the Up/Down ar- row key.

Step 7. Press ENTER to set F1 to 625 MHz or the user-defined frequency. Step 8. Press the F2 soft key.

Step 9. Enter 2, 5, 0, 0 or a user-defined frequency using the keypad or the Up/Down ar- row key.

Step 10. Press ENTER to set F2 to 2500 MHz or the user-defined frequency.

Step 11. Check that the FREQ (MHz) scale in the display area indicates the new fre- quency start and stop values (for example: F1 = 625 MHz, F2 = 2500 MHz).

Performing a Calibration

The following procedures detail how to perform the calibrations. Steps 12 through 15 de- scribe OSL calibration, while steps 16 and 17 apply only to OSLT calibration.

Step 12. Press the START CAL key. The message “CONNECT OPEN TO RF OUT PORT” will appear in the display.

Step 13. Connect the calibrated Open and press the ENTER key. The messages “Mea-

suring OPEN” and “CONNECT SHORT TO RF OUT” will appear.

Step 14. Remove the Open, connect the calibrated Short and press the ENTER key. The messages “MEASURING SHORT” and “CONNECT LOAD TO RF OUT” will appear.

4-3

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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 Options Optional AccessoriesPerformance Specifications Description Site Master Performance Specifications 2 Preventive Maintenance Annual Verification CalibrationAnritsu Service Centers Charging the Battery in the Site Master Charging a New BatteryCharging the Battery in the Optional Charger Getting Started Battery Charge IndicatorBattery Life Discharging the NiMH BatteryImportant Battery Information Getting Started Front Panel Overview Chapter Functions and OperationsRF Out Test Connector PanelClear Keypad ControlsPrint Sweep FREQ/DIST Amplitude Sweep Soft KeysMODE=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 a Screen PrintingPrinter Printer Switch SettingsSelf Test SymbolsSelf Test Errors Error CodesERRORD2 Range ErrorsInput Signal 16. Maximum Distance and Resolution vs Frequency Span 17. Using the Site Master Soft Carrying Case Using the Soft Carrying CaseMeasurement Functions Chapter MeasurementsCalibration Procedure Power On ProcedurePerforming a Calibration Selecting the Frequency RangeSaving the Setup Setting the Amplitude ScaleRecalling a Setup Recalling a Display From Memory Saving a Display to MemoryMeasurements Measurements Measurements Procedure Device-Under-Test SpecificationSelecting the Measurement Mode SWR Return Loss and Cable Loss MeasurementPerforming a Calibration Set the Amplitude Scale and Limit Line SWR or Return Loss MeasurementMeasurements 10. Cable SWR Measurement Results Setting the MarkersCable Loss Measurement Setting the Segment Limit LInes12. Cable Loss Measurement Results Loss DTF MeasurementPerforming a Calibration DTF Measurement Determining the Length of the Cable Setting the Marker13. DTF SWR Measurement Results cable length DTF Measurement Determining the quality of the cable 15. DTF SWR Measurement Results cable quality Selecting the Measurement Insertion Gain Amplifier Measurement17. Two-Port Measurement Calibration Setup Test Port Cable Optional RF in Test Port RF OUT Test Port Amplifier Gain Measurement21. Measurement Display Showing Bypass Condition Activating the Bias TeePress 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 Plot Capture Software InstallationCapture single or multiple traces to PC screen Capture multiple traces to a databaseSaving a Custom Cable List Custom Cable List Uploading and DownloadingSmith Chart Software Fault Location SoftwareProgram Operation Saving Data to a Database Pasting a Plot in Graphic or Spreadsheet For- matDrag-n-Drop Printing Appendix a Reference Data Coaxial Cable Technical 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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