User Manual

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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 become
lighter. If the Chroma level is too high, there will be distortions on the image. If the coaxial cable is too
long, it will reduce the Chroma level.
Image loop test：Test video optical transmitter and receiver and video cable, connect one
end to the tester “VIDEO OUT” port ,and the other end connected to “VIDEO IN” port, the signal
send via “VIDEO OUT” port ,and received via “VIDEO IN” port , If the testing is ok, the tester
displays several gradually dwindling photos on the desktop.
3.3.2 Color-bar generator (TV OUT)
Click to enter, the tester send the color bars from the “Video out” port ,Click the icon “PAL”,
select “PAL/NTSC” output formats
Click the selected color-bars, testing image or single bar (red, green, blue, white or black). Double click