Teac DM-24 Addendum - Manual (Page 17)

TASCAM DM-24 2.0 release notes
17
DM-24 version 2.0—Release notes—GPI functionality
To use the internal MTC generator, the SYNC SOURCE
must be set to
INT
(internal), and the appropriate
frame rate and internal generator start time selected
in the
OPTION SYNC/TC
screen. See pages 23 and 24 of
the main manual for full details.
GPI functionality
This release of the software added GPI functionality
to the DM-24. Use GPI for tasks where items (video
switchers, etc.) must be switched on or off, etc. as
simple switching is available using this facility. The
GPI outputs can be switched either using keys and
faders on the DM-24, or they can be time events, trig-
gered when the timecode source reaches a preset
point.
The DM-24 is fitted with a 9-pin D-sub connector on
the rear panel, marked
GPI
. Pin 5 of this connector is
used as a frame ground, and the remaining eight pins
are then used as GPI ports.
The ports provide switching (either a high-to-low or
a low-to-high transition, or a momentary high or
momentary low pulse).
The low level is 0V, and the high voltage level is
+5V.
The typical load presented to these switches is
12mA, and the maximum load permissible is 25mA.
Switching is virtually instantaneous (3ns) and the
width of the momentary pulses is 150ms.
Using GPI Enter the GPI screen from the UTILITY
screen, and use soft key 3 to move to the
GPI
tab.
Set up the
ITEM
s of the eight available ports from the
following list:
•
TIME EVENT
—this is a special item which disables
this port for any manual events. If this is set, the
TYPE is set to --- and cannot be changed here (it is
set in the time event list). Also note that the enable/
disable button is also set to a the
OFF
setting, which
cannot be changed, showing that the port is not
available from the manual events.
•
MUTE
(pressing the selected hardware
MUTE
key
(any one of the 32 channel faders, or any of the aux
or buss faders) will trigger the event)
Pin GPI port Pin GPI port
1 1 2 2
3 3 4 4
5 FG 6 5
7 6 8 7
9 8
Pin GPI port Pin GPI port