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cable. If the level is too high, it will distort the image.
SYNC level: Tests 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 image.
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 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.
3.3.12 Color-bar generator (TV OUT)
Click
to enter, the tester sends the color bars from the "Video out" port ,Click the icon "PAL",
select "PAL/NTSC" output formats.
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