Chapter 3 Functions and Operations

Keypad Controls

This section contains an alphabetical listing of the Site Master front panel keypad controls along with a brief description of each. More detailed descriptions of the major function keys follow.

Turns the liquid crystal display (LCD) back-lighting ON or OFF. (Leaving back lighting off conserves battery power.)

LCD Contrast adjust. Use the Up/Down arrow key and ENTER to adjust the dis- play contrast.

AMPLITUDE Displays the amplitude or scale menu of the current operating mode.

NOTE:

The AMPLITUDE and LIMIT keys are functionally identical.

AUTO

Automatically scales the display for optimum resolution.

SCALE

 

 

 

ENTER

Implements certain menu and key selections.

ESCAPE

Exits the present operation or clears the display. If a parameter is being edited,

CLEAR

pressing this key will clear the value currently being entered and restore the last

 

valid entry. Pressing this key again will close the parameter. During normal

 

sweeping, pressing this key will move up one menu level.

FREQ/DIST

Displays the Frequency or Distance menu depending on the measurement mode.

LIMIT

Displays the amplitude or scale menu of the current operating mode.

MARKER

Displays the marker menu of the current operating mode.

MODE

Opens the mode selection box (below). Use the Up/Down arrow key to select a

 

mode. Press the ENTER key to implement.

 

 

 

 

 

 

 

 

MEASUREMENT MODE

 

 

FREQ -

SWR

 

 

 

 

 

 

 

RETURN LOSS

 

 

 

CABLE LOSS - ONE PORT

 

 

 

INSERTION LOSS (+6 dBm)

 

 

 

INSERTION LOSS (–30 dBm)

 

 

DTF -

SWR

 

 

 

RETURN LOSS

 

 

POWER MONITOR

 

 

RF SOURCE

 

 

Figure 3-2. Mode Selection Box

3-3

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Image 21
Anritsu S251B manual Keypad Controls, Clear

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.