Grass Valley K2 Media Client System Guide Oct.10 2006 - Manual (Page 125)

September 7, 2006 K2 Media Client System Guide 125
VITC Input/Output
VITC Input/Output
RS-422 specification
The RS-422 interface conforms to ANSI/SMPTE 207M-1997 standard
(SMPTE 422).
GPI I/O specifications
Parameter Specification
VITC lines 10-20 NTSC (525 Line); lines 10-22 PAL (625 Line)
VITC is decoded on each SDI input and inserted on each SDI output.
VITC Reader configurable for a search window (specified by two lines)
or set to manual mode (based on two specified lines).
VITC Writer inserts VITC data on two selectable lines per field in the
vertical interval. The two lines have the same data.
VITC is not decoded off of the video reference input.
Characteristic Description
Number of Inputs/Outputs 12 inputs and 12 outputs.
Connector type 25pin D
GPI Input TTL 0-0.8 V Low; 2.4-5 V High; 1 mA external current sink
GPI Output Max Sink Current: 100 ma; Max Voltage: 30 V
Outputs are open drain drivers.
Max. voltage when outputs are open = 45V
Max. current when outputs are closed = 250ma
Typical risetimes approximately 625ns
Typical falltimes approximately 400ns