Grass Valley M-Series iVDR User Manual v.2.0.10 - Manual (Page 305)

20 April 2005 M-Series User Manual 305
GPI I/O specifications
GPI I/O specifications
IEEE 1394A interface specification
The following table describes the input requirements for the optional IEEE 1394A
interface.
Characteristics Description
Number of Inputs/Outputs 12 inputs and 12 outputs.
Connector type 25pin D
GPI Input Inputs set to TTL level high. Compatible with 5 volts CMOS/
TTL open collector or contact closures.
GPI Output 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
Characteristics Description
Standard IEEE 1394A; for import of DV based video and audio from
a digital recording device. The iVDR record channel
transport controls can be used to control the remote device.
Port Assignments Any of the ports 1-3 can be used for making a connection to
a IEEE 1394 device. The iVDR supports one IEEE 1394A
input.
Video Requirements NTSC - 25 Mb/s, 4:1:1, 720 X 480, 29.97Hz Frame Rate
PAL - 25 Mb/s, 4:2:0, 720 X 576, 25Hz Frame Rate
Audio Channels 2 channels, 16 bit, 48KHz
Timecode Device timecode input is not recorded. Instead, the clip
timecode is striped using the iVDR record channel internal
timecode generator. Start timecode is automatically set to
00:00:00:00.
Monitoring Video - 1394 video input can be monitored using the record
channel monitor in the Monitor pane. E to E is not supported.
Audio - 1394 audio must be monitored on the IEEE 1394
device itself.
Timecode - 1394 timecode input is displayed in the record
channel timecode display and the record channel monitor in
the Monitor pane.
Compatible Devices Refer to the M-Series iVDR Release Notes.