[time-nuts] Anybody have experience with TimeMachines TM1000AGPS Time Server

[Rick Thomas]

Thanks!

Getting hooked up to the serial output will be my next step.
Rick

On Nov 10, 2014, at 6:20 AM, Azelio Boriani <azelio.boriani at gmail.com> wrote:

> The GPGSV is the sentence that reports satellites'  SNR. See also:
> <http://www.gpsinformation.org/dale/nmea.htm#GSV>
> 
> On Mon, Nov 10, 2014 at 10:59 AM, Lizeth Norman <normanlizeth at gmail.com> wrote:
>> Rick,
>> 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
>> chip.
>> Norm n3ykf
>> 
>> 
>> 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…
>>> 
>>> Rick
>>> 
>>> 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.
>>>>> 
>>>>> Rick
>>>>> 
>>>>> 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 ...
>>>>>> 
>>>>>> Regards,
>>>>>> David Partridge
>>>>> 
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