The cable TV signal amplifier is composed of a power supply part and a high-frequency amplification part; it can also be divided into an AC power supply path and a high-frequency signal amplification path. The composition of the two parts is different, and their functions and functions are also different.
The power supply part is mainly to provide a stable and reliable DC power supply, which is realized through steps such as step-down, rectification, filtering and voltage stabilization.
The high-frequency signal amplification part mainly converts the energy provided by the AC power supply into high-signal energy, and amplifies and improves the high-frequency signal. The former is a DC component and the latter is a high frequency component.
DC 10000F and high frequency 10000F come from the same energy, but they must work separately. Since unstable DC or pulsating DC is mixed into the high-frequency amplification channel, it will directly affect the high-frequency signal, so the DC component provided by the power supply must be stable and without pulsation; and the amplified high-frequency signal cannot be mixed into the power supply. Otherwise, the high-frequency amplifier circuit will be reversely connected to the high-frequency amplifier circuit through the power supply channel, so that the high-frequency amplifier circuit will receive the same high-frequency signal twice, causing same-frequency interference, delayed ghosting, multiple harmonics and other problems, which will also cause prevent the system from functioning properly.
