Which cable for cable television? You have to keep that in mind
If you switch from a satellite system to cable television, you need the right cable for the installation. We tell you the differences and what you have to watch out for.
Which cable for DVB-C - you have to pay attention to that
The basic structure of coaxial cables for cable reception is identical to the cables for satellite reception. However, there are a few things to consider:
- Both types of cable are coaxial. This means that there is an inner conductor in the middle of the line and an outer conductor that runs around the inner conductor.
- The main differences are in the quality / quality of the cables and connectors.
- Stripping for cable reception usually dampens the influence of interference with approx. 85 dB. In addition, the cable attenuates the useful signal even at 100m by approx. 50dB (at approx. 2GHz). These values are sufficient for DVB-C.
- Cables for satellite reception have higher quality requirements. The degree of shielding here is usually 120 dB and the signal is only attenuated by approx. 25db at 100m. In addition, these cables have plugs with threads and are therefore not directly compatible.
- Both cable types have a characteristic impedance of 75 ohms. This corresponds to the input resistance on the connected devices. If there were deviations in this value, there would be reflections at the cable ends and thus image disturbances.
- Except for these deviations, the cables are identical. A SAT cable can be converted into an excellent cable for cable reception with the appropriate plugs. The other way around, however, it does not make sense. So when buying, make sure that the connectors for cable TV are advertised.
- A shielding of 120 dB is not absolutely necessary for cable television, but it is also not harmful as long as the price-performance ratio is right.
Connect TV: You need these cables
We'll also tell you what features to look out for with HDMI cables.