Sensoray 819 Windows SDK - Manual (Page 12)

mvsens value of the motion sensitivity to set. Valid values are from 0-15 where 0 is
most sensitive and 15 is least sensitive. Recommended values are from 3-8, default
value is 3.
S819_GetSignalStatus
ECODE S819_GetSignalStatus (int chan, int *signal, int *vidsys)
Gets video connection status.
chan
selected channel number (1-based).
signal pointer to the video signal status; 0 = video connected, 1 = no video connected.
Vidsys pointer to video system; 0 = NTSC, 1 = PAL.
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