AVYCON AIVO-70AET, Руководство пользователя

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Page.6.
Displays an analog camera image on the 7 inch 1280 x800 LCD screen display. Supports PAL & NTSC
formats. The LCD screen's back light brightness, video image brightness, contrast and color saturation
are all adjustable.
2.3.7 Video level meter
Perform NTSC and PAL video amplitude signal measurements for PEAK to PEAK , SYNC levels,
and COLOR BURST chroma level
Video signal PEAK to PEAK level:
For NTSC format, the video signal level is 140±15IRE
For PAL format, the video signal level is 1000±200mV
If the level is too low, it will cause the image to lose quality and limit the distance it will travel over
cable. If the level is too high, it will lead to wash out of the image
SYNC level: Testing the amplitude of the video sync pulse to verify if the video level is correct.
For NTSC format, the SYNC level is 40 ± 5IRE
For PAL format, the SYNC level is 300 ± 35mV
If the level is too low, it will cause the image to not frame out properly. If the level is too high, it will
lead to a poor quality
COLOR BURST level: Testing the color burst level will determine if the burst signal is sufficient to
trigger the displays color producing circuit. Burst will diminish in amplitude over longer cable runs and
can get fall below the threshold for the video display to show a color image.
For NTSC format, the Chroma standard level is 40 IRE
For PAL format, the Chroma standard level is 280mV
If the Chroma level is too low, the color will not be as deep, and some details of the image will get