Loss of lock in long-loop phase-locked receivers in the presence of large interfering carrier

In long-loop receivers, the inclusion of time delay within the loop causes significant modification in the loop´s acquisition and synchronous behaviour. In the letter an investigation has been carried out to specify the signal-to-interference ratio required to bring the loop out of synchronism with a desired noise-free carrier. Results are displayed for long loops with different time delay, as well as for short-loop receivers.