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Auxiliary signals
Synchronization
The board supports auxiliary multi-purpose input and output signals. Auxiliary
input signals can be routed as trigger input (for example, to synchronize image
acquisition with external events), quadrature input, field polarity, data valid, timer
clock input, or user-defined signals (for example, to synchronize an application
with a user-defined event). Auxiliary output signals can be routed as exposure
signals or user-defined signals (for controlling external devices, such as a strobe
light or programmable logic controller).
The board supports auxiliary signals in different formats:
Auxiliary signals
Auxiliary input signals that can be defined as either TTL or LVDS.
Opto-isolated auxiliary input signals.
LVDS auxiliary input signals.
TTL auxiliary signals that can be defined as either input or output.
Auxiliary output signals that can be defined as either TTL or LVDS.
LVDS auxiliary output signals.
TTL auxiliary output signals.
Note that the opto-isolated signals pass through an opto-coupler, a device that
protects the board from outside surges and different ground levels, and permits
total electrical isolation from the frame grabber.
You specify the purpose of the auxiliary signals in the DCF. You can then program
these signals using the MIL-Lite function MdigControl() with
, or
M_TRIGGER...
M_GRAB_EXPOSURE...
Each PSG can accept and/or provide one horizontal (HSYNC) and one vertical
(VSYNC) synchronization signal (slave or master mode).
With interlaced video sources, you can typically establish which field is being input
by noting the phase shift between the horizontal and the vertical synchronization
signals. Alternatively, you can define an auxiliary signal as a field polarity input
signal and transmit the field polarity on this signal.
Matrox Helios eD/XD acquisition section
# per path
depends on type of
signal
2
1
1
4
1
1
.
81
# total
8
8
4
4
16
4
4
,
M_USER...
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