Grass Valley 7600REF - Manual (Page 22)

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