A pulsed level gauge for determining a filling level of product in a tank, said level gauge comprising: a frequency generator for generating a Tx frequency signal and a Rx frequency signal; a pulse generator connected to said frequency generator and configured to generate a transmit signal (S T) in the form of a pulse train having a pulse repetition frequency equal to said Tx frequency, and a pulse duration; a propagation device connected to said pulse generator and configured to direct said microwave transmit signal (S T) into said tank towards said product and return a microwave return signal (S R) resulting from a reflection caused by a surface of said product; a receiver (22; 22') connected to said propagation device and configured to receive the microwave return signal S R reflected from the tank; sampling circuitry connected to the receiver and to the frequency generator, and configured to sample the received signal with a sampling frequency equal to the Rx frequency in order to provide a time expanded tank signal including a fiducial pulse and a surface echo; and processing circuitry for determining said filling level based on the time expanded tank signal, characterized by: impedance increasing circuitry (41a, 41b; 41) arranged to ensure that an input impedance of the receiver provides matching to said propagation device such that a detectable portion of the transmit pulse is received by the receiver; and a delay line arranged between said receiver (22; 22') and said propagation device, said delay line configured to introduce a delay greater than said pulse duration, such that said time expanded signal includes a transmitted pulse in addition to the fiducial pulse and the surface echo. a frequency generator for generating a Tx frequency signal and a Rx frequency signal; a pulse generator connected to said frequency generator and configured to generate a transmit signal (S T) in the form of a pulse train having a pulse repetition frequency equal to said Tx frequency, and a pulse duration; a propagation device connected to said pulse generator and configured to direct said microwave transmit signal (S T) into said tank towards said product and return a microwave return signal (S R) resulting from a reflection caused by a surface of said product; a receiver (22; 22') connected to said propagation device and configured to receive the microwave return signal S R reflected from the tank; sampling circuitry connected to the receiver and to the frequency generator, and configured to sample the received signal with a sampling frequency equal to the Rx frequency in order to provide a time expanded tank signal including a fiducial pulse and a surface echo; and processing circuitry for determining said filling level based on the time expanded tank signal, characterized by: impedance increasing circuitry (41a, 41b; 41) arranged to ensure that an input impedance of the receiver provides matching to said propagation device such that a detectable portion of the transmit pulse is received by the receiver; and a delay line arranged between said receiver (22; 22') and said propagation device, said delay line configured to introduce a delay greater than said pulse duration, such that said time expanded signal includes a transmitted pulse in addition to the fiducial pulse and the surface echo. impedance increasing circuitry (41a, 41b; 41) arranged to ensure that an input impedance of the receiver provides matching to said propagation device such that a detectable portion of the transmit pulse is received by the receiver; and a delay line arranged between said receiver (22; 22') and said propagation device, said delay line configured to introduce a delay greater than said pulse duration, such that said time expanded signal includes a transmitted pulse in addition to the fiducial pulse and the surface echo.