Chapter 2 Configuration and InstallationPCI/PXI-1408 and NI-IMAQ for Win95/NT2-4 ©National Instruments Corporationshown in Figure 2-3. Unpopulating W1 configures VIDEO0 for DIFFmode. Populating W1 configures VIDEO0 for RSE mode.Figure 2-3. Configuring VIDEO0 with Jumper W1External CLK and Synchronization Input ModeThe external PCLK, VSYNC, HSYNC, and CSYNC signals have twodifferent input modes—RSE (TTL) and DIFF (RS-422) input. In RSEmode, the input uses one analog input line, which connects to thesynchronization selection circuitry. The negative input to thesynchronization selection circuitry is tied internally to analog ground.For RSE mode, populate all five sets of jumpers on W3, as shown inFigure 2-4. In DIFF mode, the input uses two analog input signals. Onesignal connects to the positive input of the synchronization selectioncircuitry while the other input connects to the negative input of thesynchronization selection circuitry.Figure 2-4. Configuring PCLK, VSYNC, HSYNC, and CSYNC with Jumper W3a. RSE Mode (Default) b. DIFF Modea. RSE Mode (Default) b. DIFF Mode
