Using The Matrox Meteor Trigger; Signal Paths And Requirements - Matrox Meteor Installation And Hardware Reference

34 Chapter 6: Using Matrox Meteor/RGB's trigger input capability
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R
G
B
Sync
Trigger Input

Using the Matrox Meteor trigger

Besides software-controlled single-frame grabbing and
continuous grabbing (available on all versions of the Meteor),
Matrox Meteor/RGB can grab using an external
hardware-controlled trigger.

Signal paths and requirements

The RGB video data is digitized through a triple channel A/D,
bypassing the decoder, and is streamed into the Digital Video
to PCI interface
Triple
channel
8-bit A/D
Luminance
A/D
All versions
Meteor/RGB only
additional connections not shown
The Digital Video to PCI Interface controls the flow of video
data to the memory (system or display). When a trigger is used,
no video information is sent to the PCI bus until the trigger
signal is received by the trigger control logic. That is, no data
is written to system or display memory until the trigger pulse
is received.
Note that triggered acquisition is only available for a video
stream digitized by the triple channel A/D, in other words,
composite monochrome or component RGB only.
24
24
Decoder/
8
Scaler
Trigger
Control
Logic
Data
Digital Video
to
PCI Interface
Cntrl
32
PCI