Page.43.
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.
Click the selected color-bars, testing image or single bar ( red, green, blue, white or black). Double click
to full display on the screen and output, click to return main menu.
Application
BNC loop test:
Tester can send and receive color bar generator through the tester's "video out and
video in" port, it is for testing transmission channels, such as video Optical, video cables etc. The tester
"VIDEO OUT" port to connect optical terminal's sending port, and "VIDEO IN" port to optical
terminal's connect its receiving port.
Schmidt and Muller Telecommunications Pty Ltd trading as ELECTROCRAFT AUSTRALIA - ABN 79 067 000 426
