4-input frame grabber | Model 311

Model 311 4-input frame grabber
  • High frame rate transfers to PC/104+
  • Color or monochrome: PAL, SECAM, NTSC, RS-170, CCIR compatible
  • 4 composite video inputs or 3 composite and one S-video
  • 8 TTL I/O lines for camera control
  • Programmable AGC, hue, contrast, saturation


Model 311 is a PC/104+ board that captures uncompressed video from one analog NTSC/PAL input. It has four video inputs that allow up to four composite, or three composite and one S-video source to be connected to the board. A programmable video switch selects the input to be captured. Eight general-purpose digital I/Os (four in, four out) are provided for applications such as capture triggering and camera/illumination control.

Model 311 with 311TA termination board


Frame rate

Model 311 can transfer 30 frames per second with the supplied software. It supports a variety of digital formats including RGB24 and Y8 that are directly compatible with Windows bitmaps.


The Model 311 uses special circuitry to achieve horizontal and subcarrier synchronization to incoming video. It guarantees generation of the required pixel/line from a video source in which line length can vary by several microseconds. This circuitry allows the 311 adapter to quickly and accurately lock on to video signals, regardless of source. Since the technique is completely digital, the 311 can recognize unstable signals caused by VCR head switching and adapt the locking mechanism to accommodate the source.

Image scaling

Under software control, the 311 adapter can independently scale the X and Y dimensions of the captured frame. Full-resolution video may be reduced to any size down to the size of an icon. A software selectable digital filter is available to minimize aliasing artifacts induced by scaling.

A/D Conversion

The 311's signal processor uses two flash analog-to-digital converters; one for chrominance and one for luminance. Each A/D provides 2x over sampling of the camera signal. Over sampling, combined with analog anti-aliasing filters, significantly reduces the overall sensitivity to unwanted aliasing signals and enhances the 311's digital filtering.

The 311 is capable of sending just the luminance data to the host's image buffer. This feature speeds capturing monochrome images.


Capture rate30 frames/sec (NTSC, RS-170, CCIR)
25 frames/sec (PAL, SECAM)
A/D resolution8 bits luminance
8 bits chrominance
FIFO size560 bytes (280 pixels)
Output resolution768x576 (PAL, SECAM)
640x480 (NTSC, RS-170)
Y bandwidth error0.6 dB
Board dimensions(W x H x D): 4.07 x 3.77 x .98 inches
Output formatSeveral
Input power5 V (at 280 mA)
Bus structurePC/104+
Number of cameras NTSC per channel frames/second PAL per channel frames/second
1 30 25
2 8 6
3 3 2
4 1 1

Model 311 board layout


Model 311TA dimensions



File Version Type Size
Model 311 Instruction Manual1.0.0PDF240 KB
SDK Application Note1.0.0PDF2 KB
Application Notes
311 Verified ComputersPDF40 KB


File Version Type Size
Windows 2000/XP Software Development Kit1.0.0ZIP973 KB
Updated Windows 2000/XP Driver ComponentZIP9 KB
Windows CE Software Development Kit1.0.0ZIP50 KB
Linux Software Development Kit (for kernel 2.4)1.0.0ZIP170 KB
Linux Software Development Kit (for kernel 2.6)1.0.0ZIP19 KB
QNX Software Development Kit1.0.0ZIP68 KB
Other Operating Systems
Need a software development kit for another operating system? We can port our SDK to
your OS or provide the information you need to do it yourself. Contact Sales for details.

Pricing & Ordering

Model Description Qty 1 Qty 2-9 Order Qty.
3114-input frame grabber$212$193
311TAAccessory board$55$50
610C3Cable, coax, BNC composite video, 1-meter$30$30
SDK11EEnhanced software kit$103$103

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