Troubleshooting the Controller/Display

Display

Display

The display section contains the A22 CRT, and the A20 CRT Drive. The A20 CRT Drive receives parallel data from the A7 Controller and generates the drive signals for the A22 CRT. The A20 CRT Drive is tested during the power-up self-tests for the ability to receive data and to respond back to the A7 Controller. If the A20 CRT Drive passes the power-up self-tests and the display does not respond the signals going to the A22 CRT can be checked at J6 on the A29 Motherboard.

Line Name

Pin Number

Description

 

 

 

INTHIGH

J6(1)

CRT intensity reference high. Up to 100 V with

 

 

respect to INTLOW. Floating with respect to

 

 

ground. From the A22 CRT to bias the intensity

 

 

drive circuit at the A20 CRT Drive.

 

 

 

INTW

J6(2)

CRT intensity control voltage. Up to 100 V with

 

 

respect to INTLOW. Floating with respect to ground.

 

 

From the A20 CRT Drive to the A22 CRT to vary the

 

 

intensity of the display.

 

 

 

INTLOW

J6(3)

CRT intensity reference low. Floats with respect to

 

 

ground. From the A22 CRT to the low side of the

 

 

intensity drive circuit at the A20 CRT Drive.

 

 

 

HSYNC

J6(4)

Horizontal sync pulse for the A22 CRT. A TTL

 

 

pulse at approximately 19 kHz. From the A20 CRT

 

 

Drive to the A22 CRT. The HP/Agilent 8922F/H/M/S

 

 

use a 15 kHz PAL signal.

 

 

 

+12CRT

J6(5)

Filtered +12AUX for the A22 CRT. There is a 20

 

 

kHz low pass filter on the A29 Motherboard to filter

 

 

the +12AUX for the A22 CRT.

 

 

 

VID

J6(6)

Video signal for the A22 CRT. A TTL signal to turn

 

 

the signals off and on. The rate is approximately

 

 

6.25 MHz. From the A20 CRT Drive to the A20

 

 

CRT.

 

 

 

VSYNC

J6(7)

Vertical sync pulse for the A22 CRT. A TTL signal

 

 

from the A20 CRT Drive to the A22 CRT at a rate of

 

 

approximately 60 Hz.

 

 

 

GND

J6(8)

 

 

 

 

5-5

Page 50 Page 52
Page 51
Image 51
Agilent Technologies 8922 manual Display, Line Name Pin Number Description
Page 50 Page 52

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