Note: Though this section specifically discusses the SierraFC M164, the same principles also apply to SierraNet M408/M168 and to SierraNet M648.
AJA on the SierraNet M648 SFP Ports
AJA port configuration on the M648 SFP ports requires a special cabling solution, where the output of the Jammer will be looped back to the APT ports on the other hemisphere, as follows:
In the above figure, you can see that both P8 and P2 are receiving the same traffic as FPGA2 is just APT, essentially passing a duplicate copy of the traffic it sees to P2. To avoid showing the same traffic on multiple ports, P8 is filtered out by default, so that only the jammed traffic is seen.