Re: [ntp:questions] How common is LI=3 - solved.

2017-02-06 Thread Hal Murray
> By the way, the code I am writing is not part of a NTP algorithm to adjust a > system clock for time. It is for a one-time frequency calibration of an > oscillator. I take a time snapshot at the beginning and at the end of an > approximately six hour period during which I am counting cycles

Re: [ntp:questions] How common is LI=3 - solved.

2017-02-06 Thread David Taylor
On 05/02/2017 00:22, Robert Scott wrote: [] By the way, the code I am writing is not part of a NTP algorithm to adjust a system clock for time. It is for a one-time frequency calibration of an oscillator. I take a time snapshot at the beginning and at the end of an approximately six hour

Re: [ntp:questions] How common is LI=3 - solved.

2017-02-05 Thread Brian Inglis
On 2017-02-05 02:14, David Woolley wrote: > On 05/02/17 00:22, Robert Scott wrote: >> I hope to achieve a frequency accuracy of 5 PPM. Once that >> measurement is made, I store it for subsequent use in my app. > The equipment doesn't have a very long service life and is in a > temperature

Re: [ntp:questions] How common is LI=3 - solved.

2017-02-05 Thread David Woolley
On 05/02/17 00:22, Robert Scott wrote: I hope to achieve a frequency accuracy of 5 PPM. Once that measurement is made, I store it for subsequent use in my app. The equipment doesn't have a very long service life and is in a temperature controlled environment, as I think both ageing and

Re: [ntp:questions] How common is LI=3 - solved.

2017-02-04 Thread Robert Scott
On Sat, 4 Feb 2017 10:09:11 +, David Woolley wrote: >On 03/02/17 23:10, Robert Scott wrote: >> But with other servers, the first >> response came back good, the second response came back LI=3, the third >> and fourth responses never came back at all.

Re: [ntp:questions] How common is LI=3 - solved.

2017-02-04 Thread David Woolley
On 03/02/17 23:10, Robert Scott wrote: But with other servers, the first response came back good, the second response came back LI=3, the third and fourth responses never came back at all. (recvfrom() has to be aborted). Is this possibly a defense mechanism against a DOS attack? See

Re: [ntp:questions] How common is LI=3 - solved.

2017-02-03 Thread Robert Scott
On Fri, 03 Feb 2017 03:15:09 GMT, no-one@notreal.invalid (Robert Scott) wrote: >I am writing some parsing code for reading Time Server packets. The >first 32 bits of the returned packet are: > >+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ >|LI | VN |Mode |Stratum|