Hi, my Name is Hans-Georg Lehnard from Germany and I'm new here, worked as a developer for hardware then for software and last as a system developer. Now I'm retired and I can play with hardware again ;-).
I have: 4 x 20MHz Rubium (TEMEX MCFRS-1), 2 x 10MHz HP10811-60111 1 x Samsung UCCM GPSDO 1 x FA2 counter. lots of OCXO and try to build a house standard that I can trust and qualify my oscillators. Reproducible measurements with the FA2 in 10s precision mode I trust to 10E-11. The short-term stability of the HP oscillators cannot be measured with it, or both are defective. The FA2 is not suitable for short-term measurements of 0.01 ... 1s. For measurements against a reference frequency, the stability of the reference must be 5 to 10 times better than the measured frequency, and I don't have that. Now there are 2 options DMTD mixer or 3-hat measurements. Because I'm a digital person I chose the 3-hat method. The idea is now to divide the 3 measuring frequencies (20 or 10 MHz) down to 100Khz and to measure the phases with a TDC against the next reference edge. Average the measurement results until I am down to 0.001 ... 1 s. That should improve the 100ps resolution of a TDC7200 far enough and can also be output via RS232. Are my thoughts correct and could it work ? Hans-Georg _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-le...@lists.febo.com