Advantech PCI-1706U, Руководство пользователя

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PCI-1706U User Manual 2
1.1 Introduction
Thank you for buying the Advantech PCI-1706U.
PCI-1706U is an advanced high-performance multifunction card based on the Uni-
versal PCI Bus. With a large FIFO of 8K Sample, the maximum sampling rate of PCI-
1706U is up to 250 kS/s with 8 A/D converters simultaneously sampling on each
channel. The PCI-1706U has two 12-bit D/A output channels, 16 digital input/output
channels, and two 32-bit Time/counter channels so that it can provide specific func-
tions for different application requirements.
1.2 Features
PCI-1706U offers the following main features:
 8 differential analog inputs
 8 A/D converters simultaneously sampling

16-bit A/D converter, with up to 250kHz sampling rate for each channel
 Programmable gain
 Onboard FIFO memory up to 8K Sample
 Multiple A/D triggering modes
 Programmable pacer/counter
 BoardID TM switch
 Universal PCI Bus (supports 3.3V or 5V PCI bus signals)
Some of the features are described in details from the next page.
1.2.1 16-bit PCI bus Mastering DMA Data Transfer
PCI-1706U card supports PCI bus mastering DMA for high-speed data transfers. By
setting a block of memory in the PC, the card performs bus-mastering data transfers
without CPU intervention. The CPU is freed to perform other more urgent tasks such
as data analysis and graphic manipulation. The function allows users to run all I/O
functions simultaneously at full speed without losing data.
1.2.2 8A/D Converters for Simultaneous Sampling
PCI-1706U card is capable of simultaneous sampling with dedicated A/D converter
circuit for each analog input channel.
1.2.3 Supports S/W, Internal & External Pacer Triggering
PCI-1706U card supports three kinds of trigger modes for A/D conversion: software
triggering, internal pacer triggering and external pacer triggering.
The software trigger can acquire a sample whenever needed, while the internal pacer
saves CPU loading by triggering the sampling at a pre-programmed frequency. An
external pacer can be used for triggering by external frequency source.
1.2.4 On-board FIFO Memory
There is 8k of FIFO sample memory on PCI-1706U. This is an important feature for
faster data transfers and more predictable performance under Windows systems.