Dave wrote:
Yes, but I was aware of this, and that's why I got two different isolation figures.
What I was pointing out is that there will be *4* different isolation figures from any one output port, not just two. The lowest will be to the one electrically adjacent output, next (a bit higher) will be to two outputs at one remove, then (a bit higher yet) to four outputs twice removed, and finally (the highest) to eight outputs thrice removed (these eight are the ones you are calling "on the other 1:8 splitter").
Perhaps a diagram is in order (see below). Each dot represents a 1:2 splitter. (I've drawn only 1:8. A 1:16 is just this plus another 1:8, connected to the two outputs of another 1:2 splitter.)
To find the worst case output-to-output isolation, you need to identify two electrically adjacent output ports -- either by measurement or from the manufacturer's published data.
Best regards, Charles
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