What is the mean of CKT?
CKT is electrician short hand for circuit. A circuit is everything powerd by on circuit breaker
One context that I have seen this "CKT" reference is in relation to a diagnostic trouble code (DTC) - specifically relating to the vehicle speed sensor. CKT is an abbreviation for an electrical circuit If the CKT in question is part of check engine light trouble code, the only way to research the causes of those codes is to use the basic DTC code and not just CKT. See "Related Questions" below for more
lumped" means that the dimension of you ckt element is much smaller than the wavelength of the signal passing through it. Therefore, you can treat your ckt element as a lumped unit (against the wavelength), and do not have to worry about wave propagation phenomenon "within" your ckt element. The opposite of "lumped element" is "distributed network." Typically, in low-frequency ckt/network, since the frequency is low, therefore, the wavelength is large (wavelength = propagation speed(usu…