Troubleshooting the Controller/Display

Keyboard

If the pull-up voltages are present at the end of the ribbon cable and the voltages are not pulled down when a key is pressed, the problem is most likely on the A1 Keyboard assembly. If the pull up voltages are present and are pulled down when a key is pressed but the controller does not respond, the problem is most likely at the A7 Controller assembly.

The knob can be checked with an oscilloscope at the J4 connector on the A7 Controller. When the knob is turned, pulses should be present on A7-J4 pins 19 and 21. When the knob is pushed the level at A7-J4 pin 23 should change states. The A1 Keyboard end of the ribbon cable should also be checked for +5 V on pins 15 and 16. If the signals are getting to the A7 Controller the problem is most likely at the A7 Controller assembly.

Where to Go Next

If either the A1 Keyboard or A7 Controller assemblies measured in-correctly, go to chapters 8 and 9.

5-7

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Agilent Technologies 8922 manual Where to Go Next
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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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