[time-nuts] Anybody have experience with TimeMachines TM1000AGPS Time Server
normanlizeth at gmail.com
Mon Nov 10 04:59:34 EST 2014
NMEA 0138 is a standard "language". Yes it does output the signal
strength and visible sats, although I don't remember which output
sentences give that data.
I haven't looked at the serial output, so I don't know which sentences
are supported. Probably good to look at the documentation for the gps
On Mon, Nov 10, 2014 at 12:54 AM, Rick Thomas <rbthomas at pobox.com> wrote:
> Hi Lizeth,
> I’ve noticed that it’s very quick to come to a preliminary lock — though the lock is often exactly 1.000 sec off for 5-10 minutes. Eventually that fixes itself.
> Do you know if the NMEA output (once enabled, and once there is a listener to record it) would tell which satellites are visible and at what signal strength?
> Mine is also just for home use for the time being. I’m planning to get another one for use at the community radio station I volunteer at.
> They are cheap enough that, with a grant from e.g. the NSF, we could get a bunch of them and scatter them all over the Internet. With enough of them and some open software for monitoring, we could map one-way (as opposed to round-trip) times on various Internet routes — thus giving some hard data on route asymmetry. This might prove to be interesting or even useful in diagnosing problems.
> Just a thought…
> On Nov 9, 2014, at 2:07 PM, Lizeth Norman <normanlizeth at gmail.com> wrote:
>> Reading the manual, (page 8) the device can be set up to output NMEA
>> over the serial port. There are a few different pieces of code to
>> display that data.
>> Have had mine two weeks. It got gps lock before I could point the
>> browser at it's ip.
>> Just syncing a bunch of cameras as well being the "house" time standard.
>> On Sun, Nov 9, 2014 at 4:49 PM, Rick Thomas <rbthomas at pobox.com> wrote:
>>> Right. I did the reset to factory defaults jumper thing and it came back to life. I’m using it now with the default setup.
>>> I got a reply from somebody named Doug at css-timemachines suggesting that I use a different browser (I had been using Safari on my desktop Mac) so I switched to Chrome (still on the Mac) and now it seems to be a bit more friendly.
>>> In particular, it reports:
>>> Signal Strength: Satellite 1: 32 dB, Satellite 2: 31 dB, Satellite 3: 30 dB
>>> Can anybody tell if that’s good or bad? I have the antenna taped up against a window with a good view of the sky to the North-East: not too many trees in the way of a clear view out over the ocean — but somewhat occluded to the North-West: a low tree-covered ridge up to about 15 degrees above the horizon — and the bulk of the house in the way to the South. Is there a better way?
>>> I’ll report here as I explore further over the next week.
>>> On Nov 9, 2014, at 2:21 AM, David C. Partridge <david.partridge at perdrix.co.uk> wrote:
>>>>> If you’re referring to this:
>>>> I think he’s referring to section 4.3 "Resetting to Factory Defaults"
>>>>> You also have to reboot after a PW change ...
>>>> David Partridge
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