installed my new amplifier, but I have a couple of unused ports. Do I need to
Unused connections should be terminated
with 75 ohm f-terminators, which need to be purchased separately. Cable-Amplifiers.com
terminators in our accessories section. Terminators prevent
signal "leakage" which can lead to ghosting and interference in the TV
installed my new amplifier, but now the picture looks worse. What did I do
are a couple of things that could be wrong:
1. Check to make sure that you
have power to the amplifier.
The green light on the front of the amplifier
should be lit. If not, check your power supply and power cable. Make sure
you have the power cable securely connected to the PWR connection on the
amplifier. The cable from the power supply to the amplifier must be less
than 100' in length.
2. Check the other connections
into and out of the amplifier.
Take a look at each connector attached to
the cable (see picture below). If the center wire of the cable does not extend 1/16"
beyond the end of the connector, it may not be making good contact with
the amplifier ports. If necessary, install a new connector and make sure
the center wire extends a bit beyond the end of the connector.
3. If the above steps do not
resolve the problem, re-connect everything as it was before you installed
If everything works OK, you may have a defective amplifier.
This is very rare, but it does happen occasionally.
installed my new amplifier. The picture looks better, but I still see ghosts
and/or snow. It is not as good as I expected. What's going on?
are many reasons that an amplifier may not fix your cable problems. Usually
these reasons are related to existing cabling problems in your home. Here are
the most common areas to check to resolve your cabling problems.
1. Bad Connectors
Bad connectors are at the top of the list for problems. Check all of your
connections to make sure the connectors are in good condition. Always use
good quality crimp-on style connectors, not the screw-on style. Screw-on
connectors are always subject to unscrewing, coming loose, and in general
not providing a strong connection. When inspecting the connectors, be sure
that they are clean, that there is no loose wire or insulation inside the
connector, and that the center wire extends approximately 1/16" beyond
the end of the connector. If the center wire is not long enough it may not
make a good connection and cause a snowy picture. If a connector looks
questionable it is better to replace it.
2. Cheap Splitters
The splitters you use in your cable connections can make a big difference in
the quality of your cable signal. If you buy the cheap $2.99 splitters at
the local electronics or home improvement store you are likely to add to the
problems with your cable signal. Cheap splitters are made from wires and
ferrite cores, sealed in what appears to be a sturdy metal housing. Because
they are constructed so cheaply, they will actually add ghosts and snow to
your picture especially if your signal is not very strong at the splitter
input. They are also very susceptible to interference from outside sources
like electrical equipment.
High quality splitters are constructed from circuit boards and high quality
components, which makes them less susceptible to interference, ghosting, and
other problems. You can generally tell the difference between splitters by
their frequency rating. If a splitter is rated only to 900MHz, STAY AWAY!
High quality splitters are rated for 1000 MHz. The splitter should have this
information stamped or printed right on the splitter itself.
3. Too many splitters - poor
Even good quality splitters can't keep you from making mistakes. Connecting
one splitter to another splitter, to a third splitter is a bad idea. Each
time you use a splitter you cut your cable signal by more than half - even
if it is only a 2-way splitter. If you have a single cable line that you
keep splitting throughout your house, the TVs at the end of the line are
always going to suffer. When setting up the cabling for your TVs, be sure to
run as many connections as you can directly back to the first splitter or
amplifier. The more connections you have the more important this becomes. Do
not use multiple splitters unless it is absolutely necessary.
Another rule for good cabling - keep your cables split as evenly as
possible. Every time you use a splitter, you should make sure that the
number of TVs or other equipment connected to each port is the same. one
port should not supply 5 TVs while the other port supplies only one TV. Keep
those devices split as evenly as possible across your splitter ports.