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VFG Details

The diagram below shows the details of the Virtual Frame Grabber (VFG) of the Alta platform. Each member of the Alta family has from one to four VFGs. Each VFG has its own analog front end, each with three Analog-to-Digital converters. Each VFG has its own PLL and synchronization signals processor allowing it to run on its own timing, completely independent of the other VFGs on the same board. The Video Router is fully programmable and can be used to route the output of one, two or three tap cameras to one, two or three A-to-Ds respectively. In addition, the Video Router can be used to MUX between two cameras (one or two tap cameras only).

Digital data formatting and buffering is handled in the large Data MUX block. The output from this block feeds our advanced bus-mastering, scatter-gather DMA engine, which DMAs data to host memory at a rate of a gigabyte per second. This engine can DMA continuously to multiple host buffers without using any CPU cycles. In short, the Alta VFG is a small efficient frame grabber, up to four of which can be packed on one half-sized PCI Express board

Software Support

The Alta-AN is supported by the BitFlow Software Development Kit (SDK), which is available for both 32-bit and 64-bit Windows platforms. The SDK is board family generic, and will work with all of BitFlow's current and future frame grabbers. The kit provides drivers, DLLs and configuration utilities for people interested in using third party software.

For customers interested in developing their own applications, the SDK provides header files, libraries and huge amounts of example code. There is wide range of Application Programming Interfaces (API), from low-level direct hardware access, to high-level automatic buffer management (ring or sequence). Every line of code has been engineered for reliability under the toughest industrial conditions, while at the same time a priority has been put on ease of use and short development times. With the BitFlow SDK you'll have the Alta-AN integrated with your application in no time.

PCI Express Interface

The Alta-AN uses a x4 PCI Express bus interface. The PCI Express bus offers huge increases in DMA performance over the PCI bus, but what is less well known is that the PCI Express bus is always peer to peer. This means that the Alta-AN does not share the bus with any other devices. In most motherboard architectures, it will talk directly to the PCI chip set that is on the memory bus. This direct connection equates to higher sustained DMA bandwidths regardless of system load.

Alta-AN Specifications

x4 PCI Express "short" card

Super high quality discrete Analog Front End

Three A-to-Ds per VFG (maximum clock rate: 160 MHz)

Supports VGA, SVGA, XGA, SXGA, UXGA resolutions and beyond

Per channel programmable Gain/offset

Supports single tap and dual tap monochrome cameras

Supports RGB cameras (24 bits/pixel)

Supports component YPbPr cameras (YUV 4:4:4)

Supports asynchronous reset cameras

Supports partial scan cameras (high frame rates)

Multiplex between two one-tap or two two-tap cameras

Programmable Region of Interest (ROI) via sub-windowing acquisition

External hardware or software trigger

Acquire at any frame rate

Supports cameras up to 16K x 16K

Supports interlaced and progressive scan cameras

HD/VD/Composite sync signals in/out

Supports WEN input signal

Strobe output (programmable timing)

Provides power to camera (12 V @ 0.5 A)

Flowthru technology, no on-board frame buffers, zero latency data access

Efficient interrupt driven architecture, no software polling required

RoHS compliant

ALT-PCE-AN1

Supports one analog camera

x4 PCIe interface

Camera power for each camera

Industrial I/O

ALT-PCE-AN4

Supports up to four analog cameras

x4 PCIe interface

Camera power for each camera

Industrial I/O

SDK 5.00 or later required