Other Accessories; Gpi Trigger; Automatic Input Scan Mode - Videonics MX-1 Instruction Manual

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Additional TitleMaker features, such as tinted backgrounds, patterns,
scroll, and crawl, can all be used. Because the Mixer's TBC creates a stable
time base, the TitleMaker will be able to lock solidly to it, for an excellent
picture.
Title generators of lesser quality can be used instead on one of the Mixer's
inputs. Chroma key can be used to superimpose the titles onto another
source. To do this, you would set the titler to create titles atop a solid color
background and key over that color, so the second source's video would
replace the background color.

Other Accessories

The Mixer is compatible with external audio mixers, video processors, and
more. Chapter 4, "Connecting Editing Equipment" describes ways to hook
up and use such accessories.

GPI Trigger

Advanced feature. The Mixer is equipped with a jack marked "CONTROL
(GPI)." This jack will accept a GPI ("General Purpose Interface") trigger from
an external source such as a pushbutton switch or an edit controller with GPI
output.
A GPI pulse causes the Mixer to behave exactly as if the PLAY button were
pressed. Generally, it will start a transition that you have previously set up. If
you have learned a sequence (Chapter 17, "Sequences"), it will trigger the
next transition in the sequence.
Cables for connecting the CONTROL input are not generally available but
if you are reasonably handy with simple wiring, you can make your own. It's
not a difficult job but note the warnings below. If you have any misgivings
about making this cable, enlist the aid of a qualified technician.
Use a 3.5 mm stereo (3 wire) phone plug (the type used for portable
headphones). Do not use a mono jack as it will short out two of the CON-
TROL connections. Connect wires to the tip and ground. Leave the middle
("sleeve") section unconnected. The other ends of the two wires go to the
controlling device.
You can use an ordinary pushbutton to remotely trigger the Mixer —
simply wire a normally-open switch to the two wires. An edit controller or
computer that provides a contact closure will also operate as a trigger.
Important: Do not connect a power source of any kind to the CONTROL
input. This can damage the unit and void the warranty.

Automatic Input Scan Mode

The Mixer can be used to make a simple scan of all the inputs. This is a
convenient way to monitor multiple sources such as security cameras or
multiple satellite feeds.
VIDEONICS DIGITAL VIDEO MIXER