Chapter 3 Functions and Operations

Sweep Menu Provides for changing the display resolution, single or continuous sweep, and access to the Trace Math functions.

Choosing SWEEP in FREQ or DTF measurement modes causes the soft keys below to be displayed.

￿RESOLUTION — Opens the display to change the resolution. Choose 130, 259, or 517 data points. (Not active in DTF mode. In DTF mode, resolution can be adjusted through the DTF-AID table.)

￿SINGLE SWEEP — Toggles the sweep between single sweep and continu- ous sweep. In single sweep mode, each sweep must be activated by the

RUN/HOLD button.

￿TRACE MATH — Opens up the Trace Math functions (trace-memory or trace+memory) for comparison of the real time trace in the display with any of the traces from memory. (Not available in DTF mode.)

￿TRACE OVERLAY — Selects the Trace Overlay function and opens the trace overlay sub-menu.

NOTE:

The trace overlay function is valid only for traces in memory that have the same measurement mode, number of data points, and frequency or distance range as the currently displayed trace.

Trace Overlay The trace overlay sub-menu is used to turn the trace overlay function on or off

Sub-Menuand for selecting the overlay trace from memory.

￿ON/OFF — Toggles the trace overlay function on and off. If trace overlay is currently off, selecting on will bring up the trace memory selection table and sub-menu.

￿SELECT TRACE — Opens the trace memory selection table and the Select Trace sub-menu. Press ENTER to select a trace from the table. The Select Trace sub-menu choices are:

￿TOP OF LIST — Move the selection cursor to the top (first) memory lo- cation.

￿PAGE UP — Move the selection cursor to the top of the previous trace memory location page. Each page contains 15 trace memory locations.

￿PAGE DOWN — Move the selection cursor to the top of the next trace memory location page.

￿BOTTOM OF LIST — Move the selection cursor to the bottom (last) memory location.

￿DELETE TRACE — Delete the selected trace from memory. This option is not available when using Trace Overlay.

￿DELETE ALL TRACES — Delete all traces from memory. This option is not available when using Trace Overlay.

￿BACK — Return to the Sweep menu.

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Anritsu S251B manual RUN/HOLD button

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.