[time-nuts] Re: Does filtering a TCXO Vtune to reduce low tau ADEV with max 50% make sense?

2022-05-21 Thread Erik Kaashoek via time-nuts
Hi All, What I did: 0: Stopped all SPI traffic and display updating to avoid supply load changes. 1: Used a demodulating spectrum analyzer to listen to the FM at the 200th overtone (2 GHz), only white noise (e.g. dominant high frequencies) 2: Use a modulation analyzer to analyzed the FM

[time-nuts] Re: Does filtering a TCXO Vtune to reduce low tau ADEV with max 50% make sense?

2022-05-20 Thread Bob kb8tq via time-nuts
Hi The typical answer to this issue is to first try to clean up the supply to the DAC. If that does not fix the issue, you likely need a better DAC. Unless the TCXO has a crazy large tune range, rational parts should be able to do the job. If the TCXO has a crazy large range then maybe a