Research and Application of Remote Control Test Method of Amplifier Indicators

As we all know, there are many test indicators for amplifiers, including saturated output power, 1dB compressed output power (P-1), harmonic suppression, etc. The saturated output power and 1dB compressed output power are tested step by step, and the harmonic suppression needs to traverse every frequency point to calculate the results, which require testers to pay more time and effort. When there are batches of power amplifiers to be tested, manual testing methods are unrealistic. In order to simplify the test steps, reduce the input of testers, and speed up the test progress, this article introduces a test method about instrument remote control, based on GPIB and C# after the study and research for the GPIB bus of the GPIB instrument. This method calls the VISA library to drive the GPIB card to communicate with the test instrument by SCPI programmable instrument standard commands and the respective remote control commands of each instrument to perform mixed programming with C#. Finally, we can complete the measurement, display and get the data by controlling the GPIB instruments on the PC side.

Measurement applications in Industry 4.0: the case of an IoT–oriented platform for remote programming of automatic test equipment

<p><span lang="EN-GB">A laboratory regarded as a site that collects IoT devices, and which allows remote clients to use them as an automatic test equipment (ATE) through a controller acting as service provider, is proposed herein. To assure efficiency and responsiveness, the controller is programmed as a multithreading system that takes advantage of multicore processors. The controller includes a server application that supports communication with clients by means of a TCP/IP protocol. It uses GPIB bus functionalities to control the instruments of the local ATE. It allows several clients to connect and interact with the specific resources of the laboratory. Thanks to the availability of identical sets of resources and to the underlying multithreading philosophy, client requests are processed in tandem rather than according to a classical queuing approach.</span></p><p><span lang="EN-GB"><br /></span></p>

The Test System of PXI-Based Aeronautic Equipment

By analyzing the interface characteristics and test requirements of certain aeronautic equipment, using PXI instrument as test platform, integrated using SPIB instrument, virtual instrument, simulation technologies, independent developed video output collection equipment, SRU testing equipment modules and other hardware device, developed integrated automatic test equipment which based on PXI and GPIB bus instrument technology, provide airborne work environment for weapons, instrument, electrical, communication, navigation, identification, reactance systems airborne LRU, automatic complete the control, incentive, performance and function test of LRU.

Design in Agilent 3458A of Synchronous Measurement System Based on VB 6.0

This paper researches synchronous measurement system with digital meters Agilent 3458A based on Microsoft Visual Basic 6.0. In this system, two digital meters connect to PC by USB/GPIB bus and arbitrary waveform generator 33220A provides external trigger signal to the digital meters. Based on these, we have developed the synchronous measurement software, which can facilitate the realization of automatic measurement and improve measurement efficiency. The measurement method can overcome effect of high voltage power supply ripple and drift as well as decrease type A uncertainty more than 100 times especially in the measurement of voltage divider ratio.

Study on Automatic Test of the High-Precision I/F Converter

A new method that uses the same clock signal between the frequency test system and the I/F converter is provided to avoid the frequency test error. The standard instruments such as FLUKE 5520A calibration and FLUKE 8508A 8½precision multimeter are used, that not only simplifies the design of the test system but also enhance reliability of the system. The RS232 bus and the GPIB bus are used to achieve the automatic test.

Design of USB-GPIB Controller Based on up D7210

In this paper, a designing method of USB-GPIB controller is introduced in detail, the hardware structure and principle are expounded. By using upD7210 which is a GPIB interface chip and CY7C68013A which is a USB interface controller, the GPIB bus controller with USB interface is designed. With the corresponding driver, an automatic test system is established to realize automatic control by GPIB bus. The USB-GPIB controller has been provided with small size, high speed, and low cost advantages.