Phytec pciGrabber4x4, Руководство по оборудованию

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Programming Manual
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PHYTEC Messtechnik GmbH 2008 L-720e_0
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Recognition of the video format
WORD Get_Video_Status(WORD nDevNo);
return value: 0 = 525 line format (NTSC / PAL-M)
1 = 625 line format (PAL / SECAM)
This function provides the recognition of the video format of the
camera at the selected channel, and distinguishes if the source is a
NTSC- or PAL/SECAM-system. The distinguishing feature is the
different number of lines for both TV-systems. For the recognition, it
takes 32 consecute fields from applying the image source, until the
identification is finished.
Configuring the Composite Mode (Composite Inputs)
void Set_Composite(WORD nDevNo);
Calling this routine switches the Grabber onto the composite mode.
The chroma ADC is subsequently switched off and the luma notch
filter is activated. This mode must be configured when the composite
signals are to be digitized.
The composite mode must be selected for all standard cameras
(black and white, or color). These cameras do not have S-Video
outputs to connect them to the Grabber. Composite cameras are
connected to the Grabber via, i.e. the WK-037 and the WK-039
cables. The composite mode is configured during standard
initialization.
Note:
Set_Channel
must be told in which channel the image will be digitized
after calling Set_Composite .