Hello Bernd, That's good PN for 1KHz and above on the AXIS10LN. How about the 1Hz, 10Hz, and 100Hz noise? Can -95dBc/Hz. 128dBc/Hz, and 135dBc/Hz be achieved in a VCXO? How does the high power drive (which I assume is needed to achieve these PN numbers) affect long term (10+ Year) aging versus it's EFC range? Thanks, Said In a message dated 8/16/2010 21:13:05 Pacific Daylight Time, bneu...@t-online.de writes:
PN of VCXO is larger than that of OCXO because - mostly fundamental mode or low overtone crystls are used, which have lower Q that tose crystals used in OCXO - the phase noise is increased due to parametric effects of teh varactor diode Nevertheless there are VCXO on the market which provide much lower phase noise than teh mass-produced standard models. See for example the AXIS10LN on the AXTAL website www.axtal.com. There may be other vendors too ;-) Regards Bernd Neubig DK1AG _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
