[time-nuts] Anybody have experience with TimeMachines TM1000AGPS Time Server
Rick Thomas
rbthomas at pobox.com
Mon Nov 10 02:28:13 UTC 2014
Rick wrote:
>>> Signal Strength: Satellite 1: 32 dB, Satellite 2: 31 dB, Satellite 3: 30 dB
>
Bob replied:
>> On a normal GPS based gizmo, you should be seeing 6 to 8 satellites just about all the time. Carrier to noise ratios typically are in the > 40 db range. You seem to be “antenna challenged”.
>>
>> If you are in the northern hemisphere, a view to the north is not of much use. The prime viewing area is all south of you based on the way the sat orbits are set up.
Rick answered:
> I have a south-facing window I can try. I’ll move it there and see if the db report gets better.
So from the South facing window, I get:
Satellite 1: 42 dB, Satellite 2: 38 dB, Satellite 3: 38 dB
Which seems to be an improvement.
Next will be a skylight window — above most of the nearby treetops with a pretty clear 360 degree view of the sky, but still the low ridge to the West obstructing the Western horizon.
Final test will be out-of-doors on the garage roof.
One more observation: This unit seems to spend up to 5-10 minutes after power-on reporting time that’s exactly 1.000 second off from UTC. It eventually gets properly synced but it takes a while. I’m planning to leave it plugged into my UPS, so I don’t have to deal with that issue for short power outages.
I’ll report more info as I learn more to report.
Rick
More information about the Time-nuts_lists.febo.com
mailing list