Appendix D: Automatic Fail-Over Option - Thinklogical Velocitydvi-3 Product Manual

Appendix D: Automatic Fail-Over Option

For applications in need of an Automatic Fail-Over system, Thinklogical offers a solution to
meet this need. This option allows for two separate fiber paths and the ability to select which of
the two paths is the viable path. This feature is available on the transmitter unit only.
The transmitter contains all the same features as the standard Velocity products in addition to
offering a redundant fiber connector (L1') for each standard fiber connector (L1). All other
features function as described previously in the manual.
Velocity 3 TX with Automatic Fail-Over
Fiber Connections
L1 and L1' are redundant outputs, outputting the same video and KMASS data.
L2 and L2' are redundant back-channel KMASS data inputs. There is an internal MUX which
selects L2 or L2' data. When the unit is powered on, it will select L2 first (if L2 is active).
Otherwise, it will select L2' (if L2' is active). It will only switch from L2 to L2' if L2 is inactive and
L2' is active. It will only switch from L2' to L2 if L2' is inactive and L2 is active.
Velocitydvi-3 Transmitter with Automatic Fail-Over
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V e l o c i t y D V I E x t e n d e r P r o d u c t M a n u a l , R e v . G , M a y ,