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Old 14-Apr-2019, 7:45 PM   #48
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Join Date: Nov 2014
Location: Acworth, GA
Posts: 274
Originally Posted by blackstone View Post
Thanks, Tim.

Is a UVSJ combiner something that looks like a splitter but not a splitter?
If so I have one, maybe, that I have been using
A UVSJ physically looks live a splitter but works very differently. It has an input marked UHF, another input marked VHF and a Line output. I would not count on it being a UVSJ unless it is specifically marked as such.

The UVSJ has a very specific function and is used when you want to combine UHF signals from one antenna with VHF signals from another antenna.

A UHF antenna will receive some VHF signal. The UVSJ filters out the VHF component from the UHF antenna.

A VHF antenna will receive some UHF signal. The UVSJ filters out the UHF component from the VHF antenna.

Since you have signals being received on two antennas, the signals may arrive at each antenna at a slightly different time. When combined together they may offset each other and lessen the total amount of signal making it weaker. Using the UVSJ, when it combines the signals from the two antennas, there are no competing signals that will mix with each other and cause signal degradation.
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Last edited by Tim; 14-Apr-2019 at 7:50 PM.
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