Chapter 4 Measurements

Insertion Gain (Amplifier) Measurement

The following frequency domain measurement is an example of a Insertion Gain (Ampli- fier) measurement over a selectable frequency range. Insertion loss measurements, such as antenna-to-antenna isolation and filter rejection (isolation), follow the same procedures as below except in Insertion Loss (+6 dBm) measurement mode.

Required Equipment

￿Site Master Model S251B

￿(2) Precision 7/16(f) Open/Short/Load, Anritsu 2000-768

￿(2) N (m) to 7/16 (m) Test Port Extension Cables, Anritsu 15NNF50-1.5A or

(2) N (m) to N (f) Test Port Cables and (2) N (m) to 7/16 (m) adaptors (510-92)

￿7/16 (f) Adapter, Anritsu 510-97

￿Tower Mount Amplifier, Ericsson A57001HQ85 or equivalent

Device-Under-Test Specification

Type

Frequency Range

Gain (Typical)

 

 

 

TMA

1885 to 1990 MHz

+12 dB

1965 to 1990 MHz

–0.5 dB

 

 

 

 

Procedure

Step 1. Press the ON/OFF key on the Site Master.

Selecting the Measurement

Step 2. Press the MODE soft key.

Step 3. Use the Up/Down Arrow key to scroll to INSERTION GAIN (–30 dBm). Press the ENTER key to select insertion gain measurement mode.

Selecting the Frequency Range

Step 4. Press the FREQ soft key.

Step 5. Press the F1 soft key.

Step 6. Enter 1, 8, 0, 0 using the keypad or Up/Down Arrow key. Press ENTER to set F1 to 1800 MHz.

Step 7. Press the F2 soft key.

Step 8. Enter 2, 1 ,0, 0 using the keypad or Up/Down Arrow key. Press ENTER to set F2 to 2100 MHz.

Performing a Calibration

Step 9. Connect the test port extension cables to the RF In and RF Out test ports as shown in Figure 4-17.

Step 10. Press the START CAL key. Follow the instructions in the message area.

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Anritsu S251B manual Insertion Gain Amplifier Measurement, Selecting the Measurement

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.