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132 Appendix F: The breakout board
4. If routing auxiliary input signals that are not trigger signals, connect the ground
of the breakout board (J20 of the breakout board power source connector) to the
ground of the third-party device providing the input signal.
Generating a Matrox Iris GT auxiliary input or trigger signal with
a push button
You can generate a Matrox Iris GT auxiliary input signal or a Matrox Iris GT
trigger signal using the push buttons on the breakout board. To do so, perform
the following:
1. Connect the power and the digitial I/O signals of your Matrox Iris GT to the
breakout board by following the steps in the Powering Matrox Iris GT and
connecting its I/O signals to the breakout board section.
2. If generating a trigger signal, turn on output-to-trigger bypass switch 2 (SW6[2]).
This grounds the trigger signal (TRIG_OPTO_IN-).
3. Press a push button to generate an auxiliary input or trigger signal. Your breakout
board has 5 push buttons (Trig+ through Input 3), one for each of the four
auxiliary input signals of your Matrox Iris GT and one for the trigger signal. To
generate a signal that will be received by Matrox Iris GT auxiliary input signal 0
(AUX(USER)_OPTO_IN0+), press the input 0 push button.
❖ Note that the trigger push button on your breakout board will not generate a
trigger signal when Matrox Iris GT auxiliary output signal 4
(AUX(STB)_OPENC_OUT4) is routed to Matrox Iris GT trigger signal
(TRIG_OPTO_IN+).
Repeat for each Matrox Iris GT auxiliary input or trigger signal that you want to
generate. For more information on the push buttons, see the Push buttons section,
later in this chapter.
Breakout board
J32
or J33
Third party device
J20
(Input generator)
GND
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