Grass Valley 8981FS - Manual (Page 32)

26 8981FS Instruction Manual
8981FS Digital Frame Synchronizer Module
GPI Operation
The GPI freeze control input can also be configured to operate in two ways
by the “GPI MODE” control function (see
Table 3 on page 15 , Function
Switch position D, Bank 1). When the toggle mode is selected the module
will alternately switch between normal operation and freeze mode each
time the remote input is pulled to ground. When in the hold position, the
synchronizer will stay in the freeze mode only as long as the freeze control
switch is closed.
When the toggle mode is selected the freeze mode can easily be controlled
by a momentary action switch. The hold mode is intended to control freeze
mode with other equipment. In this mode positive freeze/no freeze control
can be obtained with a contact closure without regard to the present state
of the synchronizer.