Grass Valley 8900GEN-SM - Manual (Page 48)

48 8900GEN-SM — Instruction Manual
8900GEN-SM Applications
Using Local and Frame Bus References
In addition to the reference redundancy and independent frame bus capa-
bility, any GeckoFlex module that can host an 8900GEN-SM can be used to
input a reference to the host module. When frame buses are required, the
modules in slot 1 and slot 3 must always act as the host for driving Frame
Bus 1 and Frame Bus 2.
In the example in Figure 22 , slot 1 is configured to output Frame Bus 1.
Any module with Genlock capability and a Genlock submodule installed
can have an independent Local external reference (as shown in the example
for the HD module). This is done by connecting an independent reference
to the corresponding Genlock Loop input and setting the Output Timing to
Local on the specific module’s System Config web page.
Figure 22. Using Frame Bus and Local Output Timing
Set up Frame Bus 1 as detailed in Configure Primary Independent Reference
(Slot 1) on page 39 .
For a module requiring a different 720p reference as shown in the example,
an 8900GEN-SM submodule can be installed on this host module. Connect
a 720p reference to the corresponding rear module Genlock Loop and ter-
minate the unused input with 75 ohms.
Set up the reference input on the host module Genlock web page as needed
then set the host module System Config web page to use the Local refer-
ence.
8488_03
720p 50
Frame Bus 1 (PAL)
Slot 1
Ref 1 In