Intellisystem IT-900-IPC Series User Manual page 57

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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.
A. When maintaining the dome camera, the tester sends out the color bar by its BNC output to the
monitor at the monitoring center. If the monitor receive the color bar, it means the video transmit
channel works normally. Meanwhile on the basis of the received color bar, the monitoring center can
judge if transmission has loss or interference.
B. The tester sends out the pure color bar (such as white and black color), to test the monitor whether
has bright or black dots
C. The tester sends out video signal image to test if the image received by the monitor has excursion.