Re: [time-nuts] 10MHz standard for comms receivers

2018-10-03 Thread Dave B via time-nuts
The problem with that approach to EMC compliance, is all it does is fool the QP detector in the test/measurement RX. It does nothing to actually reduce the amount of radiated crud, in essence, it's the result of excessive "Bean counting" by the production costs tracking types. Small parts may

Re: [time-nuts] 10MHz standard for comms receivers

2018-10-01 Thread jimlux
On 10/1/18 10:44 AM, Dana Whitlow wrote: Isn't it the case that computer clocks these days are subject to two influences that make them worthless for timing? 1. Deliberate random FM to spectrally spread RFI leakage. and 2, Wild variations of clock speed according to usage needs of the moment,

Re: [time-nuts] 10MHz standard for comms receivers

2018-10-01 Thread Dana Whitlow
Isn't it the case that computer clocks these days are subject to two influences that make them worthless for timing? 1. Deliberate random FM to spectrally spread RFI leakage. and 2, Wild variations of clock speed according to usage needs of the moment, in order to reduce average power

[time-nuts] 10MHz standard for comms receivers

2018-10-01 Thread Bob Betts
Hi All. Over the years, I have experimented with WWVB and GPS and Rubidium timing to establish a 10MHz Standard for LO sync in communications receivers. My career has kept me away from the hobby for some time and, frankly, I am not very well versed in some of the timing techniques that I read