Grass Valley Python 3G - Manual (Page 44)

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Python 3G Operation
Python 3G Optical Measurement Display
Condition 1: No Optical Link
If there is no optical link on a particular channel the display will show n/A for not available.
Fig. 4-2: No Optional Link Display
Condition 2 – Optical Link good but no SDI data present.
When an optical link is active, but no SDI data present, the optical power reading will
change between a high and low value, such as -7 and -30.
Fig. 4-3: No SDI Data Present Display
This fluctuation between High and Low occurs because the laser for that channel turns On
and Off until SDI is present. This causes corresponding individual RX channel LED to blink
Red/Green.
Condition 3 - Active usable optical link with SDI Data
When the optical link is good and a valid SDI data stream is present, the optical power level
will be indicated.
Depending on the loss over the distance of the fiber cable run, this value could range from
approximately -5 to -20.
After the last channel is displayed, the ambient temperature inside the frame will be
indicated in degrees Celsius.
Display scrolls to reveal temperature.