112 Appendix F: The Matrox Iris GTR breakout board
To provide a pullup resistor, turn on the output pullup resistor switch (SW6[1]
to SW6[3]) associated with the auxiliary output signal of your Matrox Iris GTR.
For example, if routing Matrox Iris GTR auxiliary output signal 2
(AUX_OPTOIND_OUT2) to auxiliary input signal 6
(AUX_OPTOIND_IN6), turn on output pullup resistor switch 1 (SW6[1]),
which enables the pullup for auxiliary output signal 2. For more information on
the output pullup resistor switches (SW6), see the Output pullup resistor switches
subsection of the Switches reference section, later in this appendix.
Generating a Matrox Iris GTR auxiliary input signal using
a push button
You can generate a Matrox Iris GTR auxiliary input signal (for example, a trigger
signal) using the push buttons on the Matrox Iris GTR breakout board. To do so,
perform the following:
1. Connect the power and the digital I/O signals of your Matrox Iris GTR to the
Matrox Iris GTR breakout board by following the steps in the Powering and
connecting section, earlier in this appendix.
2. Press a push button to generate an auxiliary input signal. Your Matrox Iris GTR
breakout board has 4 push buttons (labeled INPUT3 through INPUT6), one for
each of the four auxiliary input signals of your Matrox Iris GTR. See the Push
buttons section, later in this appendix, for the correspondence between the push
buttons and the Matrox Iris GTR auxiliary input signals. For example, to generate
a signal that will be received by Matrox Iris GTR auxiliary input signal 3
(AUX_OPTOIND_IN3), press the INPUT3 push button.
Each auxiliary input signal should have only one input source. For example, when
using a push button, it should always be the only source of input for that signal,
and not have to compete with the signal from a third-party device or the re-routing
of an auxiliary output signal.
3. Repeat for each Matrox Iris GTR auxiliary input signal that you want to generate.
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