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Chapter 2
Configuration and Installation
PCI/PXI-1408 and NI-IMAQ for Win95/NT
2-4
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National Instruments Corporation
shown in Figure 2-3. Unpopulating W1 configures VIDEO0 for DIFF
mode. Populating W1 configures VIDEO0 for RSE mode.
Figure 2-3. Configuring VIDEO0 with Jumper W1
External CLK and Synchronization Input Mode
The external PCLK, VSYNC, HSYNC, and CSYNC signals have two
different input modes—RSE (TTL) and DIFF (RS-422) input. In RSE
mode, the input uses one analog input line, which connects to the
synchronization selection circuitry. The negative input to the
synchronization selection circuitry is tied internally to analog ground.
For RSE mode, populate all five sets of jumpers on W3, as shown in
Figure 2-4. In DIFF mode, the input uses two analog input signals. One
signal connects to the positive input of the synchronization selection
circuitry while the other input connects to the negative input of the
synchronization selection circuitry.
Figure 2-4. Configuring PCLK, VSYNC, HSYNC, and CSYNC with Jumper W3
a. RSE Mode (Default)
b. DIFF Mode
a. RSE Mode (Default)
b. DIFF Mode