Block Diagram Theory of Operation

Block Diagram 3 HP/Agilent 8922B Only

Block Diagram 3

HP/Agilent 8922B Only

The HP/Agilent 8922B contains 3 modules: A35 “B” Reference; A36 FIFO/GPIO; and A37 Sequence Controller assemblies that are not used in either the HP/Agilent 8922A or HP/Agilent 8922G. The function of these three modules can only be controlled using the rear panel GPIO connector (found only on the HP/Agilent 8922B) and the special control software that is supplied with the HP/Agilent 8922B. At power-up, the HP/Agilent 8922B appears to be an “A” version and should respond exactly the same as an HP/Agilent 8922A. The overall operation of the HP/Agilent 8922B is to buffer and synchronize data from an external computer. This data is then transmitted by the HP/Agilent 8922 Generator hardware. The internal connections of this hardware are illustrated in Block Diagram 3.

To the user at the front panel and for the memory card diagnostics, the instrument appears to be an HP/Agilent 8922A. Any signals that are generated by the HP/Agilent 8922B hardware appear as “external” for the control settings.

For diagnosing problems with these modules, it is necessary to use the HP/Agilent 8922B software. The software contains testing routines that load the buffers with data and read the data back. The software is also necessary to control the switches and circuits within the modules.

A35 “B” Reference

This module contains the VCO and divider circuits necessary to lock to most common reference frequencies used for GSM radio testing. These include 1, 2, 5, 10, and 13 MHz, as well as 270.833 kHz data rate clock and 216.667 kHz frame rate clock. The frequency must be selected using the software provided with the HP/Agilent 8922B.

This module provides a 10 MHz signal to the rear panel and a 270.833 kHz signal to the A37 Sequence Controller assembly.

A36 FIFO/GPIO

The A36 FIFO/GPIO assembly has 2 primary functions. The first is to communicate through the GPIO bus to an external controller and relay these control signals to the other HP/Agilent 8922B modules. To control any of the HP/Agilent 8922B modules it is necessary that the A36 FIFO/GPIO assembly communications are working correctly. The second function of the A36 FIFO/GPIO assembly is to store and send the digital data information that is “transmitted” by the RF Generator portion of the HP/Agilent 8922. The diagnostic software has a FIFO RAM test to verify that the hardware can send and receive data from the external computer.

14-15

Page 210 Page 212
Page 211
Image 211
Agilent Technologies manual Block Diagram HP/Agilent 8922B Only, A35 B Reference
Page 210 Page 212

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.
Top Page Image Contents