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Crystal Vision
Control and Status monitoring
VANC
Blank ancillary data.
VANC blank
Select to blank the vertical ancillary data in the video
signal vertical interval.
Fibre enable
Select optical or BNC as the video source. Enable fibre output and display
laser fail warnings.
Source
Select fibre or BNC as the video input
source. FIP-VF or FIO-VF module must be
fitted for fibre input.
Received
power
Displays received optical power in dBm in the range -25 to 0dBm
in 1dBm steps.
Power level Displays one of the following depending on the received power
level: ‘OVERLOAD’, ‘HIGH’, ‘GOOD’, ‘LOW’, ‘TOO LOW’.
‘OVERLOAD’ or ‘HIGH’ may cause the receiver to saturate with
poor or no video output. In extreme cases the receiver may even
be damaged – consider using an optical attenuator or a longer
fibre cable.
‘TOO LOW’ or ‘LOW’ may be the result of dirty optical connectors
– if in doubt, clean. Excessive fibre cable runs will also cause
these warnings. Although transmission distances of up to 50km
is possible with single-mode fibre, this distance is dependent on
minimal attenuation from junctions etc. Multi-mode fibre
installations can expect considerably shorter transmission
distances. Single-mode fibre, or any single-mode components
should never be used downstream of multi-mode fibre.
TANDEM10-VF User Manual R1.0
17
26 June 2017