Time Machines TM2500C Manual de usuario
TM2000B / TM2500C
PTP and NTP Time Server
GPS Time Sourced
Installation and Operation Manual
v0.4.5 and v0.6.1
Table o Contents
1 Introduction............................................................................................................................................1
2 Installation..............................................................................................................................................2
2.1 Location..........................................................................................................................................2
2.2 Connections....................................................................................................................................2
2.2.1 Antenna...................................................................................................................................2
2.2.2 Power......................................................................................................................................2
2.2.3 Network..................................................................................................................................2
2.2.4 Serial.......................................................................................................................................2
2.2.5 PPS (2500C Onl )..................................................................................................................2
2.2.6 10MHz (2500C Onl ).............................................................................................................3
2.2.7 Front Panel Indications...........................................................................................................3
3 Configuration.........................................................................................................................................3
3.1 Web Page – Default username/password is “admin/tmachine”......................................................3
3.2 Default IP address is 192.168.1.20.................................................................................................3
3.3 Settings Page..................................................................................................................................4
3.3.1 TM2X00 Name.......................................................................................................................4
3.3.2 IP Address...............................................................................................................................4
3.3.3 Broadcast................................................................................................................................4
3.3.4 Netmask..................................................................................................................................5
3.3.5 Gatewa ..................................................................................................................................5
3.3.6 DNS1 and DNS2....................................................................................................................5
3.3.7 Antenna Cable Dela (TM2500 onl )....................................................................................5
3.3.8 Disable Web Interface.............................................................................................................5
3.3.9 Leap Second Setup.................................................................................................................5
3.3.10 Password...............................................................................................................................6
3.4 Status Page.....................................................................................................................................6
3.4.1 Time Source............................................................................................................................7
3.4.2 Location..................................................................................................................................7
3.4.3 Date/Time...............................................................................................................................7
3.4.4 Satellites Used........................................................................................................................7
3.4.5 GPS Fix...................................................................................................................................7
3.4.6 NTP Lookups..........................................................................................................................7
3.4.7 Holdover Time........................................................................................................................7
3.4.8 MAC.......................................................................................................................................7
3.4.9 Uptime....................................................................................................................................7
3.4.10 OCXO Correction.................................................................................................................7
3.4.11 DPLL Status (TM2500C Onl )............................................................................................8
3.4.12 DPLL Temp (TM2500C Onl ).............................................................................................8
3.4.13 Version..................................................................................................................................8
3.4.14 Satellites................................................................................................................................8
3.4.15 NTP Peers.............................................................................................................................8
3.4.16 PTP Clients...........................................................................................................................9
3.5 Update Page..................................................................................................................................10
3.5.1 Update Notes:.......................................................................................................................10
3.6 SNMP Setup.................................................................................................................................11
3.6.1 MIB File-Download TMI-COMMON-SHI.txt.....................................................................11
3.6.2 Enable...................................................................................................................................11
3.6.3 SNMP Trap Version..............................................................................................................11
3.6.4 Notification Method..............................................................................................................11
3.6.5 Trap Receiver IP Address.....................................................................................................12
3.6.6 SNMP V2 Communit Name...............................................................................................12
3.6.7 SNMP V3 R/W User Name..................................................................................................12
3.6.8 SNMP V3 R/W Password.....................................................................................................12
3.6.9 SNMP V3 Engine ID............................................................................................................12
3.7 NTP Settings Page........................................................................................................................13
3.7.1 Start / Stop NTP Server........................................................................................................13
3.7.2 Allow 2D Fix for NTP..........................................................................................................14
3.7.3 Disable Holdover Limit........................................................................................................14
3.7.4 NTP Holdover Time (Minutes).............................................................................................14
3.7.5 Remote NTP Servers Enable................................................................................................14
3.7.6 Remote NTP Servers List.....................................................................................................14
3.7.7 Serve Time Onl With Authentication..................................................................................14
3.7.8 Authentication-Upload Ke List...........................................................................................14
3.7.9 Set TM2X00 time manuall .................................................................................................15
3.8 PTP Settings Page.........................................................................................................................16
3.8.1 Packet Output........................................................................................................................16
3.8.2 PTP Update Method One/Two Step......................................................................................16
3.8.3 Dela Mechanism.................................................................................................................17
3.8.4 Domain Number...................................................................................................................17
3.8.5 Priorit 1 & Priorit 2...........................................................................................................17
3.8.6 PTP Transmission Method (not pictured).............................................................................17
3.8.7 PTP Post-Holdover Behavior................................................................................................17
3.8.8 DSCP Port 319 and 320 Settings..........................................................................................17
3.8.9 Multicast Configuration – TTL............................................................................................17
3.8.10 Multicast Configuration – Log Announce Interval.............................................................17
3.8.11 Multicast Configuration – Log S nc Interval.....................................................................18
3.8.12 Multicast Configuration – Log Min Dela Request Interval..............................................18
3.8.13 Multicast Configuration – Log min Peer Dela Request Interval......................................18
3.8.14 802.1AS Configuration – PTP Destination MAC..............................................................18
3.8.15 802.1AS Configuration – P2P Destination MAC...............................................................18
3.8.16 802.1AS Configuration – S nc Timeout Count..................................................................18
3.8.17 802.1AS Configuration – Max Neighbor Propagation Dela (ns).....................................18
3.8.18 802.1AS Configuration – Transport Specific Field............................................................18
3.9 About Page...................................................................................................................................19
3.9.1 Download Log Files.............................................................................................................19
3.9.2 Reboot S stem......................................................................................................................19
4 Troubleshooting...................................................................................................................................20
4.1 GPS Lock.....................................................................................................................................20
4.2 Resetting to Factor Defaults.......................................................................................................20
5 Locator Data Quer ..............................................................................................................................21
6 Specifications.......................................................................................................................................22
6.1 Time Server Features and Specifications.....................................................................................22
6.2 GPS Module Specifications..........................................................................................................23
6.3 Antenna Specifications.................................................................................................................23
6.4 TM2500C OCXO Timing Information / Specifications...............................................................23
TimeMachines, Inc.
300 S68th St Place, Suite 100
Lincoln, NE 68510
402 486 0511
Engineered and Manufactured in Lincoln, NE, USA
Rev 0.6.1 1 1 2022
1 Introduction
The Time Machines PTP Network Time Server is a simple to use GPS sourced time server that will
suppl accurate time for all computers and time keeping devices on the network. B placing a time
server on the local network, PTP and NTP time packets are provided without requiring s stems to go to
the Internet to get a Stratum 1 time s nchronization. The s stem uses an active GPS antenna to
maintain the current time as broadcast b United States GPS satellites. With this device installed on
our local network, there is no longer the worr that if the Internet connection goes down, time
s nchronization is lost across the network. In addition, the TM2X00 includes a high precision internal
clock based on an OCXO (Oven controller oscillator) that allows the unit to serve accurate time be ond
loss of the GPS antenna signal.
The TM2500C differs from the TM2000B in that is has a pair of SMB outputs to allow for 1PPS and a
s nchronized 10MHz reference signal to be output from the device.
The unit is small and can be placed an where within the network la out. The built in high sensitivit
GPS receiver is able to lock multiple satellites from within man buildings or from a window location,
removing the requirement that outdoor antennas be installed.
Setup and use of this time server is straightforward. Simpl connect both the included power suppl
and the GPS antenna to the base unit and then connect the base unit to the local network. Go to a
computer on the network and browse to the device at its default address to enter the software setup
within the control box. Set parameters to match our network and the s stem will start to send out time
packets to an device on the s stem that asks for an update from it. Two servers can be setup to
provide redundanc and more capacit .
When paired with our digital Power Over Ethernet (PoE) or WiFi clocks, s nchronized time is assured
no matter the state of our network, or the state of the internet time server the clocks are pointed to.
Accurac is also improved because the network dela of the internet is highl variable, while the local
LAN connection is likel sub-millisecond dela .
TimeMachine GPS based time servers are suited to an application where coordination of events at
multiple locations is required. Without coordinated network time, searching for problems across
multiple s stem logs becomes much more difficult. Education, industrial facilities, militar
installations, public safet command rooms, government, broadcasting, and hospitals are all candidates
for s nchronized time s stems.
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2 Installation
2.1 Location
To receive GPS signals the Time Server's antenna must be located in a location where it can “see” the
sk . The GPS module itself is highl sensitive and able to “see” the GPS satellite signals from within
man structures. Multi-Stor or metal structures ma block the GPS signals such that the antenna must
be located elsewhere. In these cases, the GPS antenna ma be located in a window. The Time Server
box can be located an where on the network. All that is required is power and a wired network
connection. In the worst case, an outdoor antenna ma be required.
2.2 Connections
2.2.1 Antenna
The GPS antenna is connected through the
circular female SMA connector on the rear of the
Time Server. B default, the GPS antenna
connection provides 5.0V to power the LNA in
the GPS antenna. This is correct for the supplied GPS patch antenna with the magnetic base. This
voltage can be changed with a jumper on the inside of the Time Server. The Time Server has to be
opened up and a jumper moved.
Jumper J8
A: 3.3V B: 5.0V (default)
The onl time this jumper would changed would be to allow use of a different antenna that requires
+3.3V max for the LNA in the antenna.
2.2.2 Power
A +12V power suppl is supplied with the unit. Connect to our local power outlet and the barrel
connector to the rear of the Time Server. The time server will begin tr ing to find the GPS satellites.
On power-up, s nchronization to the GPS satellites will take several minutes. No batter backup of
position is provided to allow for a warm start so the Time Server is alwa s starting from scratch in
determining its location to achieve GPS lock.
2.2.3 Network
Connect the 10/100 RJ45 port on the back of the Time Server to a network connection. Verif that the
network settings are correct for our s stem. See the configuration section of this manual for more
information on doing this.
2.2.4 Serial
The serial port is connected b a USB-Mini t pe connector and will enumerate as a COM port on most
modern operating s stems. It is an output onl port use for some basic status information. No
configuration of operating s stem access is possible through this port. It is setup as 115200,n81.
2.2.5 PPS (2500C Only)
The PPS output is a 3.3V TTL output driven b the DPLL hardware and derived from the 1PPS output
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of the GPS receiver. It is a 50% dut c cle output where the positive rising edge denotes the second
boundar . The GPS receiver 1PPS output is specified at +/10 nano-seconds. Best results are achieved
with an outdoor antenna with a full 360 degree view of the sk . Degraded signal qualit will degrade
the precision of this output.
2.2.6 10 Hz (2500C Only)
The 10MHz output is a 3.3V TTL signal driving b the DPLL hardware and derived from the frequenc
corrected internal OCXO. It is s nchronized to the 1PPS such that it will have a postive rising edge
that corresponds to the rising edge of the 1PPS signal.
2.2.7 Front Panel Indications
The front panel of the Time Server is ver basic in its appearance. Three LEDs show the current status
of the unit. The “POW” LED indicates that the unit is receiving power through its wall power suppl .
To serve time, an accurate GPS lock is required be ond just location information. The GPS lock
process proceeds through several steps and can be followed b watching the two front Yellow LEDs,
LOCK and SEC. Initall , when no lock is present, the Yellow LEDs will be OFF. When a 2D lock is
achieved, the LOCK LED will begin to BLINK. This is the first stage of GPS lock process. When the
LOCK LED goes to a solid ON state, the GPS now has a 3D lock. The last stage of the GPS lock is the
timing lock. This signifies that the GPS has the most accurate time base available for use in serving
time. To achieve the greatest PTP accurac , this is required. Once the timing lock has occurred, the
SEC LED will begin to blink once per second.
It is also possible for the LOCK LED to turn off, or blink, after a GPS timing lock has occurred and the
SEC LED continues to blink. This signifies that the TM2X00 has an accurate internal time and is
serving time, but is tr ing to re-establish the timing lock because it was lost for some reason.
3 Con iguration
3.1 Web Page – Default username/password is “admin/tmachine”
3.2 Default IP address is 192.168.1.20
All Time Server parameters are accessed on the configuration web page. The page can be accessed b
pointing an web browser at the IP address of the Time Server. The initial IP address is 192.168.1.20
from the factor .
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3.3 Settings Page
3.3.1 T 2X00 Name
This is a generic entr that has no effect on the TM2X00 operation other than to allow the user to enter
a name for the device to help recognize it when parameter updates are required.
3.3.2 IP Address
The IP address of the unit set to b entering a standard IPv4 dotted quad in this field. 192.168.1.20 or
10.10.0.96 are examples of acceptable formats for this field. Clicking the Submit button will set the
entered IP parameters.
3.3.3 Broadcast
The Broadcast entr is used to control the propagation of network broadcast packets on the network
and to what level the will propagate from the device. This is frequentl opposite of the Netmask
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setting. This is used b the PTP functions to advertise the presence of the server. Clicking the Submit
button will set the entered IP parameters. THIS IS NOT the address t p int NTP and PTP clients
at, they sh uld given the IP Address.
3.3.4 Netmask
The Netmask entr determines what addresses are on the local network and what addresses are reached
through the Gatewa . T pical Netmasks are 255.255.0.0 or 255.255.255.0. Consult the network
administrator for more information on how this entr should be set. Clicking the Submit button will set
the entered IP parameters.
3.3.5 Gateway
The Gatewa IP address is used when a destination address is determine to not be on the local network.
Consult the network administrator for this setting. Clicking the Submit button will set the entered IP
parameters.
3.3.6 DNS1 and DNS2
Enter the IP addresses for the DNS servers on our network.
3.3.7 Antenna Cable Delay (T 2500 only)
This entr is to compensate for cable dela introduced b the antenna cable. The value is in pico
seconds. The Dela , in pico-seconds, through a cable is D=(L*C*1000)/V. Where:
•L is the cable length in feet
•C is a constant based on the speed of light, adjusted for feet: 1.016
•V is the velocit of propagation for a a specific cable. The cable datasheet is the source for this.
The LMR-195/RG-58 sold b TimeMachines has a value of 0.77.
When multiplied out, the dela for the TimeMachines sold cable is 1319 pico-seconds per foot.
Determine the total length of cable between the TM2500 SMA jack and the antenna, multipl it b
1319 and enter that value in this field. This is onl important for phase alignment of the 1PPS and
10MHz outputs and has little effect on the NTP/PTP accurac due to the jitter of a t pical packet
network.
3.3.8 Disable Web Interface
This is a securit option. Once the device is configured and operating as expected, it is possible to
check this box, save the setting, and then reboot that device. From that point forward, the web server is
disabled. To recover from this mode, the device must be reset to factor parameters b holding the
front button for about 5 seconds. The IP address will be reset and the web page will be active again.
This allows for a ph sical securit measure to be used to protect settings of the device.
3.3.9 Leap Second Setup
There are three fields that control the leap second reporting of the TM2X000 devices for both NTP and
PTP time services. As of the writing of this document, the last leap second was on December 31st, 2016
at midnight (1483142400 seconds after Unix epoch date of Januar 1, 1970). It went from 36 leap
seconds, separating atomic time from UTC, to 37 seconds. These are the default settings for the
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device. These should NOT be changed until another leap second is announced. When that occurs, the
Current setting will be changed to 37, the Da adjusted to midnight of the da it will occur (alwa s
June 30th, or December 31st), and the Next setting will be updated as well to the new number of leap
seconds. There is some thought that the next leap second ma be negative due to the earths rotation
slowing. Both positive and negative leap seconds are supported through this interface. NTP will report
the entire da of the leap second whether it is a positive or negative second change, and PTP will do the
same for last 12 hours of the da . Both will adjust appropriatel for the lost or additional second at
midnight.
3.3.10 Password
The Password of the unit can be changed in this field. The existing password is not displa ed for
securit purposes. Enter the new password and click the “Change Password” button to update. The
TM2X00 will then prompt for the new password to be entered to continue access to the web pages.
* Default Username/Passw rd is “admin”/“tmachine”.
3.4 Status Page
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