Question 1

Is there a way to monitor the device to make sure its still receiving signal and time updates?

Accepted Answer

The TM1000A does not have any support for SNMP or any other type of direct monitoring.  A script could be setup somewhere that is periodically checking time and looking at the return value of the lookup.  If the TM1000A loses its GPS signal, it will return several error flags and the Stratum level will change from 1 to 15.  From that return value you could generate a notification.The unit supports configuration through a web page interface.  A quick login can tell you if its running (can you log in) and the web page displays the GPS lock status and signal strengths of the top 3 sats.  There is an internal HW watchdog on the unit and if the software stops servicing the watchdog, it reboots itself.  As long as the GPS signal strength, based on antenna location, is good, these units are very reliable.

Question 2

what is the oscillator and accuracy if the signal from GPS is interrupted?

Accepted Answer

This product doesn't serve time if GPS lock is lost.  Our TM2000A product does.  Specifics of its capabilities can be found on the manufacturers website.

Question 3

How long is the antenna/receiver cable?  What type of connector?  Server is in the middle of the building, doubt GPS penetrates well enough.

Accepted Answer

Cable: RG174, 5m length, SMA male. Antenna is magnetic. Find a phone with GPS, if the GPS on the phone works there is a good chance the antenna will. It only has to be connected to the network as long as the clients can query the device it does not matter where it is located. Manual can be downloaded at http://www.css-design.com/downloads/TM1000A_Manual.pdf

Question 4

Does this support ntp authentication?

Accepted Answer

Not that I am aware of...  I view this unit as an 'in-house' time reference,  so why would authentication be necessary when it is totally under your control?  The processor is weak and is not designed to handle large (internet size) traffic.

ASIN	B002RC3Q4Q
AntennaDescription	Satellite
Best Sellers Rank	#164 in GPS Antennas
Brand	TimeMachines
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (48)
Item Weight	1.6 pounds
Manufacturer	TimeMachines
Mfr Part Number	760-1000-000
Model Number	TM1000A
Number of Channels	1
Number of Items	1
UPC	837654709085
Unit Count	1 Count
Warranty Description	All Time Machine products carry a one year warranty that covers manufacturing defects on the hardware and software. Please see details on our website www.css-timemachines.com.

TimeMachines, NTP Network Time Server TM1000A

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