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S768DAV – S7768DAV User Manual
LEVEL/LOSS I
4.2.2
This LED indicates the relative optical signal strength received at the module. When sufficient optical
power is being received, the LED is green. As the optical power decreases, as happens through long fiber
runs, splices or connections, the LEVEL/LOSS LED stays green until the optical power drops below the
minimum level.
The LEVEL/LOSS LED will turn bright red to indicate an insufficient amount of optical power is being
received. All data will default to its failure state level to eliminate bus contention.
VIDEO IN/OUT I
4.2.3
The VIDEO IN (or OUT) LED indicates the strength of the video signal. The VIDEO IN LED on the module
remains green as long as an adequate video signal is being input to the unit. If the video input becomes
too weak, the LED will turn red. The VIDEO OUT LED on the module performs a similar function, except
that it refers to the video output from the unit.
Note: The S768DAV monitors the video sync signals to determine the strength of the signal. It does not monitor the brightness
signal. Thus, if the scene in front of a camera is totally dark, producing a blank monitor screen, the VIDEO IN and OUT LEDs can
still be green.
AUDIO 1, 2 IN/OUT I
4.2.4
The AUDIO IN (or OUT) LED indicates the strength of the audio signal by varying in intensity. The AUDIO
IN LED remains green as long as an adequate audio signal level is being input to the module.
If the audio input becomes too weak, the LED will turn off. The LED will be red when the audio level is
clipped.
The AUDIO OUT LED performs a similar function, except that it refers to the audio output from the
module.
DATA 1, 2 IN/OUT I
4.2.5
The DATA IN LED indicates the level of the data signal being input to the S768DAV over copper. A green
DATA IN LED indicates a logic HIGH is present on the data inputs.
An amber DATA IN LED indicates a logic LOW is present on the copper. No color (OFF) indicates a tri-
state or high impedance input.
This LED can be used to determine the resting state of your equipment and, in the RS485 states, verify
that a tri-state is being detected properly.
The S768DAV has special circuitry to capture data transitions and make them visible on the LEDs. High-
speed bursts of activity, previously undetectable by standard LED circuits, are easily seen by this special
circuitry.
The DATA OUT LED functions identically to the DATA IN LED except that the LED represents data that is
being output from the unit. This LED has the same high-speed capture circuitry as the DATA IN LED.
11-0768DAV-B/ December 2003
NDICATOR
NDICATORS
NDICATORS
NDICATORS
Operation
23
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