On February 18, 2016 at 21:04, King of typos said...
What is the db loss 8-way splitter anyways?
Learn how to figure it out: 2 way splits the power in two; half the power is -3dB. 4 way splits the power twice, so -6dB. 8 way splits the power again, so -9dB.
None of the splitter sections are perfect, so usually the specs are given as -4, -7, and -10, just to allow a little fudge room for reality.
Is it an active or passive splitter? We've used either a passive splitter if levels past the splitter were still with in -8 to +8db. Or an active splitter if it was under -8db. Though the active splitter we used didn't add any db, the only made it even to what went in. AKA Unity gain amp.
Right.
So if the signal was 0db, and you put an passive 8-way in. It would've taken away 15db on each output. Whereas an active 8-way wouldn't take away anything, it would've kept it at 0db.
Nothing supports your "15dB" arithmetic. There should be about 8 dB of attenuation to each output of an 8 way passive splitter.
Note, just for understanding's sake, that we're not talking about any actual loss here! If you take a signal and split it 8 ways, each output has 1/8th the original power. Some people then say this is insertion loss. But if all the outputs add up to the input, there is no insertion loss, just the attenuation you get from splitting. In a perfect world, that's -9 dB from the input. Anything more than 9 dB of attenuation from input to output... THAT could be called loss or insertion loss.
