I/O Connector Signal Connection Descriptions; Figure 4-2. I/O Connector Pin Assignments - National Instruments IMAQ PCI-1408 Getting Started

Chapter 4 Signal Connections

I/O Connector Signal Connection Descriptions

Signal Name
VIDEO0±
VIDEO<3..1>±
PCLKIN±
HSYNCIN±
PCI-1408/NI-IMAQ for Mac OS
VIDEO0+
VIDEO1+
VIDEO2+
VIDEO3+
CSYNCIN+
VSYNCIN+
HSYNCIN+
PCLKIN+
CSYNCOUT

Figure 4-2. I/O Connector Pin Assignments

Table 4-1 describes each signal connection on the 25-pin DSUB
connector.
Table 4-1. I/O Connector Signals
VIDEO0± allows for a DIFF or RSE connection to video channel 0. To operate in RSE
mode, connect VIDEO0- to GND. When you use VIDEO0+ or VIDEO0-, you must
disconnect the BNC connector.
VIDEO<3..1>± allows for a DIFF or RSE connection to video channels 1, 2, and 3.
To operate in RSE mode, connect VIDEO- to GND.
Use PCLKIN± when the PCI-1408 is in external lock mode. In this mode, PCLKIN
represents the A/D sampling clock. You can select PCLKIN to be TTL or RS-422 mode,
depending on the jumper W3 configuration. In RS-422 mode, both PCLKIN+ and
PCLKIN- receive the PCLK signal. The PCLKIN polarity is programmable.
Use HSYNCIN± when the PCI-1408 is in external lock mode. HSYNC is a
synchronization pulse produced at the beginning of each video scan line that keeps a
video monitor's horizontal scan rate in step with the transmission of each new line. You
can set HSYNCIN in TTL or RS-422 mode depending on jumper W3 configuration. In
RS-422 mode, both HSYNCIN+ and HSYNCIN- receive the HSYNC signal. The
HSYNCIN polarity is programmable.
13
VIDEO0-/GND
25
12
VIDEO1-
24
11 VIDEO2-
23
10
VIDEO3-
22
9
GND
21
+5 V
8
CSYNCIN-/Unused
20
7
VSYNCIN-/Unused
19
6
HSYNCIN-/Unused
18
5
PCLKIN-/Unused
17
4
TRIG(3)
16
GND
3
TRIG(2)
15
GND
2
TRIG(1)
14
1
TRIG(0)
Description
4-2 © National Instruments Corporation