LNBF stands for Low-Noise Block Converter Feedhorn. It's a device attached to a satellite dish that collects the weak signal from the satellite, amplifies it, and converts it to a frequency that can be understood by your satellite receiver.

There are two main types of LNBFs for satellite TV reception -

C-band LNBs  (Usually Cablled Cable TV LNBs)

Ku-band LNBs (Usually called DTH LNBs)

C-band LNBF -

These LNBs are designed to receive signals in the C-band frequency range, typically from 3.4 GHz to 4.2 GHz. C-band signals are larger and less susceptible to interference from weather conditions compared to Ku-band signals. However, C-band dishes are large or heavy which requires more precise pointing.

Ku-band LNBF -

The Ku-Band LNBs operate in the Ku-band frequency range, generally between 10.7 GHz and 12.75 GHz. Ku-band dishes are smaller and used for DTH receptions.