What is the proper sequence of the filter and splitters?

Question

On the last visit from a tech he connected the incoming cable to a 2-way splitter with one output going to the cable/phone modem and the other to a filter connected to a 3-way splitter.  One output on the 3-way goes to the DVR and the other two to mini-boxes.  Why wouldn’t the filter be the first device connected to the incoming coax?  Do filters cause problems for modems?The modem is an old Arris Docsis 3.1 model TM3402A.The filter is an Antronix MoCA Input Blocking Filter GLF-1002The splitters are Antronix CMC2000HC-A Series

DannyS · Answer

Being that the line for your services appears to be inside the home from a single outlet.  We place what is referred to as a MOCA filter to eliminate return noise and to allow the cable boxes in the home to operate properly.  This filter if placed inline before the modem will create connection concerns.  So, the first splitter is a two-day to supply a direct line to the modem and filter placed on the other output leg on that splitter to catch all video equipment in behind it.  If each device in the home had its own outlet.  This filter would be installed outside where it would not be seen.

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