Figure 5-10. Advanced Panel (1) - National Instruments IMAQ PCI-1408 Getting Started

© National Instruments Corporation
The Advanced Panel (1) settings are as follows:
• Sync Detect—This register defines the comparator voltage used to
detect a horizontal synchronization pulse. The reference level is the
voltage of the sync tips. For a typical video signal, the sync tips is
approximately 300 mV below the blanking level and the highest
detection value of 125 mV is recommended. Lower values may be
used if the incoming video signal is weak or noisy.
• Aspect Ratio Correction—This function adjusts the pixel aspect
ratio of the acquired picture and also compensates for pixel aspect
ratio errors of the camera. Given a standard video format with a
default configuration, you can correct errors up to ±8% in steps of
1/HCOUNT or typically 0.15%. Note that using this function will
affect most of the Advanced camera settings parameters. The
function automatically will reposition and resize the picture by
adjusting the region of interest offset and width parameters so that
the visual region of interest stays unchanged. After you change the
Aspect Ratio Correction and click the OK button, a warning
message will appear that tells you the Acquisition Window width

Figure 5-10. Advanced Panel (1)

5-11
Chapter 5 Configuration Utility
PCI-1408/NI-IMAQ for Mac OS