I'm trying to find splitters with the highest possible port to port isolation. Unfortunately this isn't a query Google is well suited for, but I'm hoping maybe one of you guys might have some experience here. Not looking for some sort of specialty/custom product costing $50, just regular but high end splitters. The reason I need this is because I'm running bidirectional RF over coax, and trying to minimize the crosstalk between the two 'outputs' of the splitter where I have signals travelling in opposite directions. When I first used a random cheap cable splitter I had laying around there was noticeable interference. I switched to a Pico Macom WS3G-2 satellite splitter and it cleared up quite well, so if this is the best I can do it is quite acceptable. However, since I can still see a snowy version of the (analog) signal when I disconnect the intended video path and rely solely on crosstalk, there's clearly still more to do - if possible. The Pico Macom splitter is rated for a port to port isolation of 20 db, which is the same as the cheap GC splitter I used at first. I assume Pico Macom lists the QC minimum for isolation and the actual value is higher. This is a 3GHz satellite splitter so it is likely better built than a regular cable splitter. The upstream RF in this case is in the range of 750-800 MHz, so the ones advertising high isolation in the return band (I assume intended for cable modems) may or may not be what I'm looking for - not sure how easy it would be to build one with much higher isolation in the <50 MHz range of a cable modem return band than at higher bandwidths. I found a Steren 201-222 listing 30 db, and a Signal Vision SV-2G listing 40 db 'in the return band'. Anyone know of anything higher?