Block Diagram Theory of Operation

Block Diagram 4

Block Diagram 4

This block diagram illustrates the assemblies that are unique to the HP/Agilent 8922E/F/ G/H. These modules are primarily digital and represent the hardware necessary to create the digital protocol to set up and maintain a phone call with a GSM mobile phone. A special diagnostics “loopback” program is included on the diagnostic memory card. This program causes the HP/Agilent 8922E/F/G/H to set up a phone call to itself (loopback), and measure the bit error rate. This exercises most of the digital hardware and gives a high confidence that the A31 CODEC, A32 GSM Controller, and A34 GSM RTI assemblies are operating correctly.

A31 CODEC

A32 GSM Controller

A34 GSM RTI

The A31 CODEC assembly provides the speech processing (coding and decoding) to convert the analog speech to and from the GSM format. This assembly also provides many of the real time channel processing functions that keeps the HP/Agilent 8922G synchronized with the mobile radio.

Overall control of the A31 CODEC, A32 GSM Controller, and A34 GSM RTI assemblies is provided by the A32 GSM Controller assembly. This A32 assembly interfaces with the main controller (A7) for communication with the remainder of the instrument. The A32 GSM Controller assembly also communicates with the Option 003 A35 Protocol Interface assembly.

The A34 GSM RTI (Real Time Interface) assembly provides the logic and switches to interface the data, clock and synchronization signals into the analog RF generator and RF analyzer hardware. This assembly replaces a jumper board (A34 in the HP/Agilent 8922A instrument) which allows it to access external signals from the front and rear panel, as well as provide key signals to the A33 Hop Controller assembly and A5 Premod Filter/NSM assembly.

A35 Protocol Interface (HP/Agilent 8922F/HM/S Option 003 Only)

This assembly buffers the digital signal from the A32 GSM Controller assembly to the rear panel where it can be connected to a protocol analyzer. This option allows a user to view the messages that are passed over the communication channel between the radio and the HP/Agilent 8922F/H.

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Agilent Technologies manual A32 GSM Controller, A35 Protocol Interface HP/Agilent 8922F/HM/S Option 003 Only
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8922 specifications

Agilent Technologies 8922 is a versatile and robust mobile communication test set, designed to fulfill the demanding requirements of wireless device manufacturers and service providers. Primarily focused on mobile radio communications, the 8922 provides a comprehensive solution for testing a wide array of signaling standards and technologies, making it essential in the rapidly evolving telecommunications landscape.

One of the standout features of the Agilent 8922 is its support for multiple wireless standards, including GSM, GPRS, EDGE, WCDMA, and HSPA. This makes the device an ideal choice for testing mobile devices that operate on different generations of cellular networks. Additionally, the 8922 is equipped with advanced measurement capabilities, allowing users to perform key performance indicators assessments, such as power, modulation quality, and spectral emission analysis, ensuring devices meet stringent regulatory and performance standards.

The 8922 is designed with an intuitive user interface that simplifies the setup and execution of tests. It features a large color display, making it easier for users to view test results and navigate through various functions. The built-in automation capabilities enable seamless integration into production environments, where efficiency and repeatability are crucial for high-volume testing.

Technologically, the Agilent 8922 incorporates advanced signal processing algorithms, which enhance its measurement accuracy and speed. The device's architecture allows for real-time analysis of signals, enabling users to identify issues quickly and efficiently. This is particularly important in the realm of mobile communications, where time-to-market is critical for competitive advantage.

Another significant characteristic of the 8922 is its flexible configuration options. Users can customize the test set with different hardware and software modules to suit specific testing needs. This scalability ensures that the 8922 remains relevant as wireless technologies evolve and new standards emerge.

In conclusion, the Agilent Technologies 8922 is an indispensable tool for professionals engaged in the testing of mobile communications devices. Its broad support for multiple standards, advanced measurement capabilities, user-friendly design, and flexibility make it a top choice in the telecommunications testing community. As the mobile communication industry continues to advance, the 8922 stands out as a leading solution for ensuring that devices meet quality and performance expectations.
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