Matrox Rapixo CXP Installation And Hardware Reference page 53

• Payload.
The amount of data transmitted to the PCIe bus within each data packet.
Common payload sizes are 128, 256, 512, 1024, 2048, and 4096 bytes.
• PoCXP.
Power-over-CoaXPress. Power-over-CoaXPress is the term for power transmitted
to a video source over a coaxial cable using the CoaXPress standard. Power can be
provided to a video source, at up to 13 W per cable, at a nominal voltage of 24 V.
• Quadrature decoder.
A device that decodes input received from a linear or rotary encoder with
quadrature output.
• Real-time processing.
The processing of an image at the same speed or faster than the speed at which
images are grabbed. Real-time processing ensures that no frames are missed.
Also known as live processing.
• Rotary encoder.
A device used to convert the angular position of a shaft or axle, to an analog or
digital code.
• Timer output.
The signal generated by one of the programmable timers of the frame grabber.
The timer output can be used to control external hardware. For example, it can
be fed to the video source to control its exposure time or can be used to fire a
strobe light.
Glossary 53