We all have one. Ideally, the transmitter will have more than one input: one for the cable box signal and one or more for devices such as streaming boxes or Blu-ray players.
And boom—you have a multi-screen system with no extra cable boxes or wires. As with the coaxial cable method, unfortunately, wireless transmitters still give you only a single point of content: the cable box. For more details on setting up a household wireless TV transmitter, including non-cable antenna options, peruse this guide.
The viewing options are fewer, but, hey, you get what you pay for in these post-analog times. Signals traveling through passive splitters degenerate slightly with each split. Powered splitters boost signals to their original strength from the source. Passive cable splitters can weaken TV signals, but not always noticeably. Cable length and distance from the signal source are more likely to affect TV quality, in which case a powered cable splitter can usually fix the problem.
About the Author Bill Frost. He holds a bachelor's degree in philosophy from Santa Clara University. Home Hardware. Step 1 Determine, measure and cut the length s of wire you need to travel from the cable splitter to the device s requiring the cable signal input. References WireItYourself. If you are only running two wires a short distance one to three feet , purchase pre-cut RG cables.
Making your own wire lengths is generally less expensive than buying pre-made up wires if more connections and longer distances are involved. Low quality coax splitters can adversely affect the video signal, causing excessive attenuation of the signal signal loss and multiple reflections which can cause ghosting shadows on the picture.
Figure 1 shows the difference in the construction between typical low and high quality 2 way splitters. The low quality splitter has a single ferrite which attempts to control the impedance of the splitter.
This typically fails to produce a good wideband impedance match and results in unwanted reflections and signal loss. The high quality splitter has a printed circuit with multiple components that assure the performance of the splitter over a wide frequency preferred. It is often very useful to know whether there are splitters in a coax distribution system and to be able to assess the splitter quality. Its also useful to determine how many times the signal is split on a specific run.
Some installation practices only allow at most a 2 way split, so determining if there are multiple splitters is very important. Yes, the CableIQ can detect the presences of splitters in a coax system, but not always show their location output branches must be un-terminated. In the past, detecting the presence of splitters, their quality and the number of splits has been very difficult to do without specialized test equipment. However, the technology implemented in the CableIQ now allows this information to easily be determined.
The TDR trace will contain information to generally assess the quality of the splitter and how many times it is split. TDR is like radar and signals reflect off each point where there is an impedance change. If the impedance change goes higher, for example an open circuit, the reflection is positive. If the change in impedance is lower then the reflection is negative. The size of the reflection is a function of the size of the impedance change.
With this simple knowledge, a user can view the TDR trace and determine if there are impedance mismatches due to a splitter and how many times a signal is split. Consider the following example of coax cabling which has a 2 way splitter being tested by a CableIQ Figure 2. It has three branches of lengths L1, L2 and L3 respectively. L2 and L3 are connected to the output ports of the splitter and are un-terminated. Figure 2: Example coax cabling test configuration with a splitter. I'm using Comcast and I have the line from the wall is split three ways: 1 Cable Set Top box sits in the lower shelf of the entertainment center 2 Cable modem sits in back, top shelf of the entertainment center 3 Wall pass-through to the bedroom HTPC I haven't experienced any problems at all with this setup.
Wolf - Thanks for the feedback on your experience. Quick follow up question: Do you have HD service with an hdtv tv, and if so did you notice any quality loss after splitting the signal? HD still looks good to me p. Mar 17, 1, 0 19, AkiMtn Distinguished. Mar 6, 1 0 18, 0.
For those who may be searching threads: The issue of apartment vs. An apartment building is wired with distribution amplifiers and each apartment may have one to three outlets. The cable guy knows what to expect for that apartment building.
A homeowner is responsible for their own setup and a prewired house could have ten outlets on two or more floors. But if you have a 10 room two story house with five TV's, two Tivo's or more, you need to have a proper distribution set up or you can run out of signal strength.
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