Chapter 4 Measurements

Step 15. Remove the Short, connect the calibrated Load and press the ENTER key. The message “MEASURING LOAD ” will appear.

NOTE:

For OSLT calibration, the messages “MEASURING LOAD” and “CONNECT LOADS TO RF OUT AND RF IN PORTS” will appear.

Step 16. Connect the second calibrated load to the RF In test port and press the ENTER key. The messages “MEASURING ISOLATION” and “CONNECT RF OUT PORT TO RF IN PORT” will appear.

Step 17. Remove both loads, connect an adapter and/or a cable from the RF Out test port to the RF In test port and press ENTER.

Step 18. Verify that the calibration has been properly performed by checking that the message “CAL ON” is displayed in the upper left corner of the display.

Setting the Amplitude Scale

The following procedure sets the amplitude scale.

Step 1. Press the AMPLITUDE or LIMIT key to call up the Scale menu.

Step 2. In SWR mode, press the TOP soft key and enter 1, ., 1 using the key pad or the Up/Down arrow key, and press ENTER. (In Return Loss mode, enter 0; in Inser- tion Gain/Loss mode, enter 100.)

Step 3. In SWR mode, press the BOTTOM soft key and enter 1 using the key pad or the Up/Down arrow key, and press ENTER. (In Return Loss mode, enter 54; in In- sertion Gain/Loss mode, enter –120.)

NOTE:

Figure 4-3and 4-4show the typical responses of a valid OSL calibration with a load attached to the test port with 517 data points.

Figures 4-5,4-6,4-7and 4-8show typical responses of a valid OSLT calibra- tion with loads attached to the test port and with the RF Out test port attached to the RF In test port.

To change the number of data points, press the SWEEP key, followed by the RESOLUTION soft key. Select 130, 259, or 517 data points.

Saving the Setup

The following procedure can be used to save a setup and calibration in memory.

Step 1. Press the SAVE SETUP key.

Step 2. Use the key pad or the Up/Down arrow key to select a memory location (1 - 10), then press ENTER.

Recalling a Setup

The following procedure recalls a setup from memory.

Step 1. Press the RECALL SETUP key.

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Anritsu S251B manual Setting the Amplitude Scale, Saving the Setup, Recalling a Setup

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.