Grass Valley Telethon 3G - Manual (Page 24)

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Telethon 3G Operation
System Firmware 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.
This fluctuation between high and low occurs because the laser for that chanel 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.
System Firmware Display
The Telethon 3G display will display the current firmware version when the unit is powered
on. This appears in the display as a scrolling series of alphanumeric character four
characters wide.
Fig. 4-2: Firmware display
Technical Information Display
Flicking the CHAN SEL switch to the left provides additional technical information that
identifies the specific physical channel that is being measured. This information is
presented in scrolling format four characters wide.
Fig. 4-3: Technical Information display