National Instruments Monochrome Image Acquisition Device NI 1410 - Manual (Page 22)

Chapter 3 Signal Connections
NI PCI-1410 User Manual 3-4 ni.com
Digital I/O Connector Signal Connection Descriptions
Table 3-1 describes each signal connection on the 68-pin VHDCI
connector.
Table 3-1. I/O Connector Signals
Signal Name Description
VIDEO0
±
VIDEO0
± allows for a DIFF or RSE connection. To operate in RSE mode,
you must connect VIDEO0– to DGND. When you use VIDEO0+ or
VIDEO0–, you must disconnect the video signal from the BNC connector. To
operate in DIFF mode, remove attached W1 jumper.
VIDEO<3..1> ± VIDEO<3..1> ± allows for a DIFF or RSE connection to video channels
1, 2, and 3. To operate in RSE mode, connect VIDEO<3..1>– to DGND.
PCLKIN
±
Use PCLKIN
± when the NI 1410 is in external lock mode. In this mode,
PCLKIN represents the A/D sampling clock. You can select PCLKIN to be
either TTL or RS-422 mode and program its polarity through software. In
RS-422 mode, both PCLKIN+ and PCLKIN– receive the PCLK signal.
HSYNCIN
±
Use HSYNCIN
± when the NI 1410 is in external lock mode or external
HSYNC/VSYNC (HLOCK only) mode. HSYNC is a synchronization pulse
produced at the beginning of each video scan line that keeps the video monitor
horizontal scan rate in step with the transmission of each new line. You can set
HSYNCIN for either TTL or RS-422 mode and program its polarity through
software. In RS-422 mode, both HSYNCIN+ and HSYNCIN– receive the
HSYNC signal.
VSYNCIN ± Use VSYNCIN ± when the NI 1410 is in external lock mode or external
HSYNC/VSYNC (HLOCK only) mode. VSYNC is a synchronization pulse
generated at the beginning of each video frame that tells the video monitor
when to start a new field. You can set VSYNCIN to be either TTL or RS-422
mode and program its polarity through software. In RS-422 mode, both
VSYNCIN+ and VSYNCIN– receive the VSYNC signal.
CSYNCIN
±
Use CSYNCIN
± when the NI 1410 is in CSYNC external mode. CSYNC is a
signal consisting of horizontal sync pulses, vertical sync pulses, and equalizing
pulses only. You can set CSYNCIN to be either TTL or RS-422 mode and
program its polarity through software. In RS-422 mode, both CSYNCIN+ and
CSYNCIN– receive the CSYNC signal.
CSYNCOUT CSYNCOUT is a TTL output of the internal CSYNC signal. In CSYNC
external mode, CSYNCOUT maps directly to CSYNCIN. In standard mode,
the synchronization circuitry of the NI 1410 generates CSYNCOUT.