From: Jan Ceuleers <jan.ceuleers@gmail.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: "Eric S. Raymond" <esr@thyrsus.com>, bloat-devel@lists.bufferbloat.net
Subject: Re: Preliminary results of using GPS to look for clock skew
Date: Fri, 23 Sep 2011 14:10:43 +0200 [thread overview]
Message-ID: <4E7C7743.3020503@gmail.com> (raw)
In-Reply-To: <CAA93jw6=O2x-Gy4b99UwAA77iXbAj4Vpd3018AGqZxMqaqvQqQ@mail.gmail.com>
On 09/23/2011 11:38 AM, Dave Taht wrote:
> Thirdly - as much as I would like to get a PPS signal, that seems
> impossible with the hardware we are
> currently playing with. That said, delays/variations of 10ms are not a
> real problem as the bufferbloat signal
> can often be measured in close order of seconds.
>
The cheapest GPS timing receiver, which includes a PPS signal, that I am
aware of is the Garmin GPS18LVC. It requires soldering to a serial port
connector, and also needs a +5VDC power source such as can be obtained
from a USB port, but it is a very capable device.
Note that it needs to be the LVC variant - other variants of the GPS18
lack the PPS signal.
next prev parent reply other threads:[~2011-09-23 12:10 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-21 23:02 Eric Raymond
2011-09-22 0:18 ` Dave Taht
2011-09-22 2:11 ` Eric Raymond
2011-09-22 2:24 ` Jonathan Morton
2011-09-22 2:29 ` Eric Raymond
2011-09-23 9:09 ` Jan Ceuleers
2011-09-23 9:38 ` Dave Taht
2011-09-23 12:10 ` Jan Ceuleers [this message]
2011-09-23 12:50 ` Rick
2011-09-24 14:50 ` Jan Ceuleers
2011-09-22 9:08 ` Dave Taht
2011-09-22 17:15 ` Rick Jones
2011-09-22 17:34 ` Dave Taht
2011-09-22 17:43 ` Rick Jones
2011-09-22 17:58 ` Dave Taht
2011-09-23 10:57 ` Aidan Williams
2011-09-23 10:10 ` Dave Taht
2011-09-23 9:09 ` Jan Ceuleers
2011-09-23 9:24 ` Jan Ceuleers
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