The ADV7311 is currently used in an existing product. To redesign using the
ADV7341, is a firmware change required? What other changes should be
considered, such as support components, etc?
These 2 parts are very similar. The basic firmware should be good however you will have to just verify each configuration script you use from the ADV7341 data sheet. I wasn't able to find any 7311 -> 7341 specific conversion instructions.
Refer to the reference schematic for the 7341 (it's almost the same as the 7311). The ferrite beads in the power rails help with power supply noise coupling into the output.
Our existing circuits employ the “reset” to reset the SC phase to zero or 180. The function of the SFL appears to change the SC frequency, not just the phase (please correct me if my interpretation is inaccurate).
Can the change in phase be accomplished with the SFL? Do I need to create a data stream of the same frequency with the desired phases? Do I need to employ a device such as the ADV7403 to generate the stream as described on page 55?