Before revision: The symbols used for these impedances are; the impedance of the generator the impedance of the load Popular values of impedance are 600Ω in telecommucations and audio, 75Ω for video and dipole antennas , 50Ω for RF The voltage transfer function, A, is, While the inverse of this is the loss, L, of the attenuator, The value of attenuation is normally marked on the attenuator as its loss, LdB, in decibels (dB).
After revision: The symbols used for these impedances are; the impedance of the generator the impedance of the load Popular values of impedance are 600Ω in telecommucations and audio, 75Ω for video and dipole antennae , 50Ω for RF The voltage transfer function, A, is, While the inverse of this is the loss, L, of the attenuator, The value of attenuation is normally marked on the attenuator as its loss, LdB, in decibels (dB).