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Grass Valley 7600REF User Manual

Page 22

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22

7600 SD/HD/MHD-REF — Instruction Manual

Installation

GPI Inputs 1 and 2

The General Purpose Interface (GPI) inputs 1 and 2 are configured in soft-
ware using the menus described in

GPI Inputs 1 and 2 on page 22

to provide

any of the following functions:

Force freerun mode

Force Genlock mode

Force external 10MHz lock mode

Step through SDI output 1 test patterns

Step through SDI output 2 test patterns

Step through SDI output 3 test patterns

Step through setup memories

The single-ended 7600 GPI inputs are activated when connected to a
ground connection on the 25 pin Sub-D connector as shown in

Figure 2

.

The two GPI inputs are pin 18 and pin 19 as listed in

Table 1 on page 21

. The

inputs can withstand +/- 20V and draw approximately 600uA when acti-
vated.

Figure 2. Connection to GPI Inputs

GPI In

7600Ref