Analogue output card is full of features
An Advantech product story
Edited by the Electronicstalk editorial team Mar 18, 2002
For PCIbus applications where high-speed continuous analogue output or real-time waveform functions are required, Advantech reckons its PCI-1721 advanced analogue output card is an effective solution.
For industrial PCIbus applications where high-speed, continuous analogue output or real-time waveform functions are required, Advantech reckons its PCI-1721 advanced analogue output card provides an effective solution.
The card features four output channels, each of which is equipped with a 12bit double-buffered DAC.
A maximum digital update rate of 10MHz gives the PCI-1721 impressive high-speed performance.
The card features a number of unique features that include an auto-calibration function that eliminates the need for external equipment and user adjustments, and a facility that enables output settings and values to be retained after system reset.
PCIbus mastering for data transfer allows users to run all I/O functions simultaneously, at full speed, without losing data; This is achieved by setting aside a block of memory in the PC and gives the dual benefits of freeing the CPU to perform other, more urgent tasks and enabling the PCI-1721 to perform data transfers without the need for CPU intervention.
Recognising the fact that many users will operate multiple PCI-1721 boards in their systems, Advantech has built in a DIP switch, making it possible to define individual board identifications.
This simplifies matters when accessing each card during hardware configuration and software programming.
Each of the four analogue output channels can perform continuous waveform output at up to 10Msample/s.
Alternatively, it is possible to load a cyclic waveform into the onboard 1024 sample capacity FIFO memory buffer.
This will then give a continuous output of the waveform.
An integral 82C54 chip provides programmable timing for generating the pacer trigger for digital to analogue conversion.
The chip includes three 16bit counters of 10MHz clock.
One operates as an event counter for the input channel, while the other two are cascaded to provide a 32bit timer for pacer trigger timebase.
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