TV Antenna Equipment
Matching Transformers
SA IV-V Antenna impedance transformer
Code: C0002
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Specifications
| Name | SA IV-V |
| Code | C0002 |
| Input | 21-69 |
| Loss [dB] | <1,5 |
| Input impedance [Ohm] | 300 |
| Output impedance [Ohm] | 75 |
A typical antenna has a balanced output of 300 Ohm impedance ratio, while a coaxial cable is an imbalanced load of 75 Ohm impedance. This is why an indirect connection must be created to fit an antenna with a coaxial cable: an impedance transformer must be used. An impedance transformer is a passive device which uses a transformer to change the impedance, and switch between balanced and imbalanced load.
Usually, the transformer is of standard construction, with ferrite core. Sometimes transformers are optimized for working in a particular band, e.g. C0001 for channels 1-12, while impedance transformers working on channels 21-69 are mostly printed ones.
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