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ITALIAN926

join:2003-08-16
kudos:2
reply to More Fiber

Re: [HD] Is Verizon lying about HD?

So, the majority of splitters in the real world, and the ones primarily installed by Verizon are rated 5-1000Mhz, but the MOCA LAN works on 1150Mhz, interesting to know that the splitters will pass that.


landminer

@verizon.net
said by ITALIAN926:

So, the majority of splitters in the real world, and the ones primarily installed by Verizon are rated 5-1000Mhz, but the MOCA LAN works on 1150Mhz, interesting to know that the splitters will pass that.

verizons plan from the beginning was to use as much installed in home wiring as possible to cut down on installation cost, labor, and inconvenience to customer. that included the widely installed base of coax & 1000mhz splitters. those splitters are rated and guaranteed for 1000mhz but pass frequencies much higher. there is not a hard stop band @ 1000mhz however there is roll off which means more loss as you go higher above 1000mhz. MOCA was designed specifically with this in mind.


More Fiber
Premium,MVM
join:2005-09-26
West Chester, PA
kudos:32
reply to ITALIAN926
said by ITALIAN926:

MOCA LAN works on 1150Mhz, interesting to know that the splitters will pass that.

Splitters don't stop passing higher frequencies just because they're only rated to a certain frequency. It just that the attenuation is higher above that frequency.

A 5-1000Mhz splitter is typically rated by the manufacturer to pass 5-1000Mhz with only 3.5db of loss. Loss as 1150Mhz might be 3.9db. Not within spec, but tolerable for MOCA. MOCA claims to be usable up to 50db of loss. I'm skeptical of that number, but keep in mind that MOCA must pass through every splitter between every endpoint on the coax network and those losses are cumulative (including losses on each of the coax segments).
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