[time-nuts] Can ADEV of a frequency source be correctly determined using a continuous time-stamping frequency counter?

Hi, Anders Wallin has details of a commercially available time stamping counter that will do a proper ADEV measurement. He also includes links to other interesting sources. Search for: CONT vs RCON mode on the 53230A frequency counter

[time-nuts] Can ADEV of a frequency source be correctly determined using a continuous time-stamping frequency counter?

As far as I understood the ADEV at a Tau of 1 second is a statement about the amount of variation to be expected over a one second interval. It would be nice if we would be able to measure a frequency in an infinite short interval but any frequency measurement takes time. What if the frequency co