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Guest Message by DevFuse

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Internal difference between a DC passing and DC blocking splitter


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5 replies to this topic

#1 OFFLINE   slice1900

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Posted 13 May 2013 - 11:49 AM

Can anyone explain or point to some resources that detail the exact difference between a DC passing and non-power passing splitter?

 

I know there are some electronic components used in the splitter to accomplish the splitting (resistors, transformers, something like that, I'm not an EE guy) and the losses from those components are the reason signal outputs are typically between 3.5db and 5db lower on each side, depending on frequency, versus the 3db loss you'd see if the splitter was "perfect".

 

How is the splitting of the DC voltage accomplished?  Is that passing through some electronic components as well, or does the DC signal component bypass all that, and behave pretty much as if you'd used a "Y" adapter with one input and two outputs?

 

 


SL5, PI-6S, SA-6AL 3xSWM16, 21 H20-100, 1 H20-600, 7 H24-700/AM21


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#2 OFFLINE   P Smith

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Posted 13 May 2013 - 01:03 PM

usually blocking path(es) has ceramic capacitor of a few pF



#3 OFFLINE   gov

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Posted 13 May 2013 - 01:22 PM

Inductors, yada, yada, yada, reluctance, etc. back EMF, whatever.

 

 

 

:coffee



#4 OFFLINE   gov

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Posted 13 May 2013 - 01:25 PM

{sparky school was 30 years ago, I'm having a good day to remember that much}

 

{there is also something to do with blue stinky  magic smoke}

 

 

:eek2:



#5 OFFLINE   P Smith

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Posted 13 May 2013 - 01:41 PM

[it's too early to drink booze :( and post the gibberish]



#6 OFFLINE   gov

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Posted 13 May 2013 - 02:27 PM

12 stepper, I'm like that all the time now . . .

 

 

:righton:






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