  We present the first experimental confirmation of the so-called
"self-phaselocked delay interferometry". This laser frequency stabilization
technique consists basically in comparing the prompt laser signal with a
delayed version of itself that has been reflected in another LISA satellite 5
million km away. In our table-top experiment, the phase of a voltage-controlled
oscillator is stabilized by means of a control loop based on this technique. In
agreement with the theory, the measured unity gain frequency is not limited by
the inverse of the used delay (1.6 microseconds). In the time domain, the
system also behaves as predicted, including the appearance of a quasi-periodic
"ringing" just after the lock acquisition, which decays exponentially. Its
initial amplitude is smaller when the loop gain is slowly ramped up instead of
suddenly switched on.
