User manual

Installation and Integration Imagestore User Manual
Page 164 Miranda Technologies Ltd
Pin SDI Control Port Function
23 GPI 5 input/output (user assigned).
24 GPI 3 input/output (user assigned).
25 GPI 1 input/output (user assigned).
Connection of Analogue Faders
Analogue faders may be used to control a main fade, a fade to black and the
levels of transparency, gain and clip. A resistive potentiometer (a "pot") of at
least 20KΩ should have its fixed terminals connected between pin 7
(Analogue Fader V+) and pin 15 (Analogue Fader ground). The variable
output of the pot should connect to the appropriate fader input pin.
Screened cable should be used to connect the fader to Imagestore. The screen
of the cable should be connected to ground only
at the Imagestore end of the
cable to avoid "earth loops" and restrict extraneous signal levels to less than 1
mV.
Connection of General Purpose Interfaces
(GPIs)
General Purpose Interface ports may be used either to trigger the execution of
a series of Imagestore internal pre-programmed commands (input) or to
monitor the status of the Imagestore (output). The process of assigning
command macros to an individual GPI port is described later in this section.
Input to GPI
Ports GPI 1 through GPI 7 can be allocated as either input or output ports, but
GPI ports 8 and 9 are only available as inputs. Where a GPI port is used as an
input, the command macro may be activated by either connecting or
disconnecting the input line to GPI ground (pin 13) depending whether GPI
'on' or GPI 'off' has been assigned.