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12-14-2009 06:23 PM
I recently had Verizon Fios send me 4 additional STB boxes (QIP2500-3) for 3 additional bedrooms and a den. The splitter which was a four way splitter had to be replaced with an 8-way splitter which Verizon supplied. When I connected the first two additional rooms, the Tv's worked. When I connected the last two, I lost the signal to all of the TV's except on. Through trouble shooting, I found out I need a signal amplifier. Can anyone give me more advice on a coax signal amplifier or some sort of solution to my problem? I also really didn't need an 8-way as a 6-way would do (5 TV's and the Modem) but don't know if this would fix the problem.
12-15-2009 07:08 AM
I am not aware of an amplifier that is compatable with FIOS. The problem is that you need a bi-directional amplifier with a pass band above 900 MHz (for the MoCA signal that delivers the guide and VOD). AFAIK all the so called bidirectional cable amplifiers are designed for standard cable system architecture and only provide a return path below 49 MHz.
Changing the splitter to a 6-way should help, but even with an 8-way there should be plenty of signal (if you are getting your own splitter make sure it is rated for 5 - 1000 MHz). Are the unused ports on the 8-way terminated with a 75 ohm load? All unused splitter ports should be terminated.
12-15-2009 11:37 AM
It is also possible that a signal reducer is in place. You should have more than enough signal strength to run the boxes.
01-18-2010 07:38 AM
Bi directional amplifier.
There is not really such a thing.
Actually there is a tuned filter to allow talk back to the main hub.
The filter is shunted from the input and the output and allows the passing of the talk back frequency spread while
offering a large impedance to the normal channel spread so as not to affect the operation of the amplifier for the
Most Bi directional amplifiers are for the Comcast type that allow a a talk back or through for 5-42MHZ range.
The above frequency is out of range of the 54 to 1000 mhz of the amplifier and stops any oscillation due
to the feedback of the talk back.
What needs to be done is to get an amplifier that has a cutoff lower than is lower than the 900mhz region
for the talk back.
Putchasing one that is x to 1000 mhz is not a good idea.
One with a cutoff that is below 900mhz is what is needed as you do not want to amplify the talkback
frequency to prevent stauration of the amplifier.
Where do you get the band pass filter.
Get the 915mhz saw filter it will serve the purpose.
You may need two if your amplifier saturates with feedback
The first is a shunt from input to output.
The second may have to be used as a input shunt .
I see no reason that this scenario will not work.
01-19-2010 08:39 AM
The FiOS tech that installed my service installed an amplifier on the coax leg that feeds my router (AT) to
clear up an issue with widgets and guide data.
It was made by the same company that makes the splitters (PDI). It was supplied at no cost to me.