National Instruments IMAQ PCI-1409 User Manual

Also see for IMAQ PCI-1409: User manual Getting started

National Instruments IMAQ PCI-1409 User Manual Manual pdf 31 page image

Chapter 4 Signal Connections© National Instruments Corporation 4-3 IMAQ PCI/PXI-1409 User ManualI/O Connector Signal Connection DescriptionsTable 4-1 describes each signal connection on the 68-pin VHDCIconnector.Table 4-1. I/O Connector SignalsSignal Name DescriptionVIDEO0± VIDEO0± allows for a DIFF or RSE connection to video channel 0. To operatein RSE mode, connect VIDEO0– to GND. When you use VIDEO0+ orVIDEO0–, you must disconnect the BNC connector.VIDEO<3..1>± VIDEO<3..1>± allows for a DIFF or RSE connection to video channels1, 2, and 3. To operate in RSE mode, connect VIDEO– to GND.PCLKIN± Use PCLKIN± when the 1409 device is in external lock mode. In this mode,PCLKIN represents the A/D sampling clock. You can select PCLKIN to beeither TTL or RS-422 mode and program its polarity through software. InRS-422 mode, both PCLKIN+ and PCLKIN– receive the PCLK signal.PCLKOUT± Use PCLKOUT± when your camera requires an external pixel clock source.The 1409 device can generate variable pixel clock frequencies between500 kHz and 40 MHz. You can set PCLKOUT± through your software in TTLand RS-422 modes.HSYNCIN± Use HSYNCIN± when the 1409 device is in external lock mode. HSYNC is asynchronization pulse produced at the beginning of each video scan line thatkeeps a video monitor's horizontal scan rate in step with the transmission ofeach new line. You can set HSYNCIN to be either TTL or RS-422 mode andprogram its polarity through software. In RS-422 mode, both HSYNCIN+ andHSYNCIN– receive the HSYNC signal.VSYNCIN± Use VSYNCIN± when the 1409 device is in external lock mode. VSYNC is asynchronization pulse generated at the beginning of each video frame that tellsthe video monitor when to start a new field. You can set VSYNCIN to be eitherTTL or RS-422 mode and program its polarity through software. In RS-422mode, both VSYNCIN+ and VSYNCIN– receive the VSYNC signal.CSYNCIN± Use CSYNCIN± when the 1409 device is in CSYNC external mode. CSYNCis a signal consisting of horizontal sync pulses, vertical sync pulses, andequalizing pulses only. You can set CSYNCIN to be either TTL or RS-422mode and program its polarity through software. In RS-422 mode, bothCSYNCIN+ and CSYNCIN– receive the CSYNC signal.CSYNCOUT CSYNCOUT is a TTL output of the internal CSYNC signal. In CSYNCexternal mode, CSYNCOUT maps directly to CSYNCIN. In standard mode,the synchronization circuitry of the 1409 device generates CSYNCOUT.