Tektronix Grass Valley 3000 - Manual (Page 60)

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Section 2 — Startup & Configuration
The types of GPI assignments available are Miscellaneous
(Aux Tallies), Keyframe Effects, Auto Transitions, Cuts,
E-MEM registers, and Frame Stores, as indicated by the labels
under the bracket in the display. One of these functions is
always selected; the selected function is indicated in
parentheses under the
FUNCTION SELECT knob label.
2. To assign a GPI input, first press GPI SELECT to select the
desired input.
3. Select the type of function to be assigned (Misc, Auto Trans,
etc.) by pressing the appropriate soft button.
4. Turn the FUNCTION SELECT knob to select the specific
function to be assigned (Aux Tally, etc.).
5. For each GPI, after the desired function has been selected,
press
PROGRAM GPI to enter the selection. The function will
then appear in the table in the display.
The following functions are available for assignment:
MISC — Enables selection of the Aux Tally Back function, or
allows the selected GPI input to be disabled.
AUX TALLY — Allows an external device to control the
aux bus tally level (high or low). The AUX BUS soft knob
selects the appropriate aux bus.
DISABLE GPI — Causes any signal applied to the selected
GPI input to be ignored.
KF EFFECT — Enables selection of the Keyframe GPI function.
The following functions may be triggered with GPI pulses:
RUN, REWIND, AUTO RUN, and REVERSE