All this talk about microcontrollers and IEEE1588 made me get out of the
shadow to ask:
1) Are you talking about IEEE1588-2002 or IEEE1588-2008? The former has
no use to me, but the later could replace some GPSs in a system i´m
designing...
2) If you intend to play with IEEE1588-2008, do
Interesting: a sort of public grandmaster. I don't think there are any
available. I have attended an Oscilloquartz's live meeting on IEEE1588 and,
of course, they have shown their expensive production but, in general, it
should be useful to find public grandmasters to test with.
On Wed, Feb 1,
On Wed, Feb 1, 2012 at 6:09 AM, Daniel Mendes dmend...@gmail.com wrote:
All this talk about microcontrollers and IEEE1588 made me get out of the
shadow to ask:
1) Are you talking about IEEE1588-2002 or IEEE1588-2008? The former has no
use to me, but the later could replace some GPSs in a
] On
Behalf Of Azelio Boriani
Sent: Wednesday, February 01, 2012 9:21 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] IEEE1588
Interesting: a sort of public grandmaster. I don't think there are any
available. I have attended an Oscilloquartz's live meeting
Einstein
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Daniel Mendes
Sent: Wednesday, February 01, 2012 6:09 AM
To: time-nuts@febo.com
Subject: [time-nuts] IEEE1588
All this talk about microcontrollers and IEEE1588 made me get out
On Wed, Feb 1, 2012 at 9:20 AM, Bob Camp li...@rtty.us wrote:
Hi
The gotcha with a public grandmaster is routing to it. Without 1588
routers / hubs / switches / what ever, the result is compromised. You fall
back into the same routing delay mess as NTP. Since public pretty much means
Chris Albertson wrote:
The combination of a network server and a GPS receiver is called a
Grand Master. It is not expensive to set one up. Any low-end PC
hardware that has a real serial port and then a good timing grade GPS.
You can't get away from the need to have at least one GPS
There's no requirement for a grandmaster to be hooked up to GPS. It may just
as well work
off its own oscillator. A grandmaster is the ultimate source of time in a PTP
network. It is
not relevant what its time source is.
That is correct. It can use any kind of reference clock. GPS is the
the switches.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chris Albertson
Sent: Wednesday, February 01, 2012 12:52 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] IEEE1588
On Wed, Feb 1, 2012 at 9:20
On 01/02/12 18:52, Chris Albertson wrote:
On Wed, Feb 1, 2012 at 9:20 AM, Bob Campli...@rtty.us wrote:
Hi
The gotcha with a public grandmaster is routing to it. Without 1588
routers / hubs / switches / what ever, the result is compromised. You fall
back into the same routing delay mess as
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