Tekron NTS 02-G User manual

NTS 02-G
USER MANUAL
Third Edition – Copyright©2022

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Contents
Contents...................................................................................................................................................... 2
1. Introduction .................................................................................................................................... 4
Product Overview.................................................................................................................................................. 4
Accessories ............................................................................................................................................................ 4
2. Front Panel...................................................................................................................................... 5
LCD Display ............................................................................................................................................................ 5
Contrast Adjustment Mode................................................................................................................................... 8
LED Indicators........................................................................................................................................................ 8
USB Port .............................................................................................................................................................. 10
3. Back Panel ..................................................................................................................................... 11
P1 Power Input.................................................................................................................................................... 11
Earth Stud (M4 Nut) ............................................................................................................................................ 11
Ant: Antenna Connector (SMA Connector)......................................................................................................... 11
Antenna Cable Considerations ........................................................................................................................ 12
P2: IRIG-B Input (3-pin 3.81 mm Connector) ...................................................................................................... 13
P3: Programmable Output (3-pin 3.81 mm Connector)...................................................................................... 13
P4: Sync and Antenna Alarm Relays (4-pin 3.81 mm Connector) ....................................................................... 14
ADMIN/ETH 1: Ethernet Administration Port (RJ-45) ......................................................................................... 14
ETH 2 and ETH 3 – Ethernet Communication Ports (RJ-45) ................................................................................ 14
4. Software........................................................................................................................................ 15
Configuration Tool............................................................................................................................................... 15
USB driver............................................................................................................................................................ 15
5. Installation .................................................................................................................................... 16
Identification ....................................................................................................................................................... 16
Location............................................................................................................................................................... 16
Power Supply....................................................................................................................................................... 16
Hazardous Voltage .............................................................................................................................................. 16
Mounting the NTS 02-G....................................................................................................................................... 17
Operation ............................................................................................................................................................ 17
6. Factory Reset ................................................................................................................................ 18
7. Factory Hardware Options............................................................................................................ 19
Power Supply Options ......................................................................................................................................... 19

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Slave Only Option (Fiber input) ........................................................................................................................... 19
8. Appendix ....................................................................................................................................... 20
NTS 02-G Specifications....................................................................................................................................... 20
9. Warranty Statement ..................................................................................................................... 22
10. Notes............................................................................................................................................. 22

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1. Introduction
Welcome to the NTS 02-G user manual! This document contains everything you need to know about
the key features, hardware, and installation process of the NTS 02-G.
Product Overview
The NTS 02-G Network Time Server provides a precision time reference for synchronizing Ethernet
networks. The NTS 02-G features multiple independently addressed Ethernet ports, each supporting the
Network Time Protocol (NTP) and Precision Time Protocol (PTP). Each NTS 02-G base unit has a built-in
GNSS synchronized master clock which, in the default operating mode, provides the source reference
time used by all Ethernet ports.
The NTS 02-G product is ideally suited for use in industrial environments and can provide NTP or PTP
server functions to multiple independent Ethernet networks.
All NTS 02-G units feature a front panel display (see Figure 1) giving visual feedback about the time data
being generated on the outputs. LED indicators provide “at a glance” status information.
Figure 1 – NTS 02-G front and back panels
The NTS 02-G features an administrative 10/100 Mbps Ethernet port through which the unit’s inputs
and outputs can be configured.
Accessories
The NTS 02-G comes complete with an Ethernet cable to allow for customization and easy setup from
the Windows™ Configuration software, which is available to download from www.support.tekron.com
Optional accessories include antenna, low loss antenna cable, antenna pipe mounting components and
lightning protection kit.

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2. Front Panel
Figure 2 – NTS 02-G front panel
The NTS 02-G features two LED indicators on the front panel (see Figure 2), together with a USB port
and a 2-line by 16-character backlit LCD display.
SYNC LED: This LED shows the current sync status of the NTS 02-G.
ALM LED: This LED shows the alarm status of the NTS 02-G.
ADMIN (USB) Port: This port can be used to configure the NTS 02-G using the Tekron Configuration Tool
- available for download on the Tekron website www.tekron.com.
LCD Display
On initial power-up, the LCD display shows a copyright message, along with the serial number and NTS
02-G firmware version (see figure 3a).
Approximately 10 seconds after power-up, if the NTS 02-G is operating in its default mode as a GNSS
synchronized grandmaster clock, then the display changes automatically to indicate that it is waiting for
satellites (see figure 3b).
Once one or more satellites have been discovered, it transitions to the operating default display (see
figure 3c). Figures 3d and 3e show alternative time displays that can be accessed by pressing the button
on the front panel between the LED indicators.
Successive button-pushes can be used to cycle through all the display screens in turn. Examples of the
display screens are shown below:

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Figure 3a - Start up (Time Server ID) Figure 3b - Waiting for satellites
3c – Operating default 3d – Local time
3e – UTC Time
3g – IP Address
3f - Alarm
Figure 3 – LCD display screens
“UTC” represents Coordinated Universal Time (approximately equivalent to GMT). The top line of screen
(Figure 3c) shows the time server’s current local time offset from UTC (hours and minutes), together
with the local date. The local time day-of-year and time-of-day are on the bottom line.
Figure 3c shows that the time server is operating with a local time offset of 12 hours ahead of UTC. The
local date is 17th March 2013, and the local time is 11:16:53 in the morning.
Figure 3d shows the same time and date, but also indicates that the time displayed is Local Standard
Time, and that the day is Tuesday. “LST” denotes Local Standard Time. If daylight savings time is active,
the “LST” in screen 3d changes to “LDT”, denoting Local Daylight Time.
Figure 3e shows the UTC time and date which is 11:16:53 on the evening of Monday 17th March 2013.
Figure 3g shows the basic Ethernet network settings for Admin/ETH1 port. In this example it shows the
port has been configured with a fixed/static IP address of 192.168.96.10.
The display screens in Figure 3b, 3c, 3d and 3e, each show a three-character status field at the bottom
right-hand corner of the display. When the NTS 02-G is operating in its default mode as a GNSS
synchronized grandmaster, this field provides further details about the GNSS function as shown in Figure
4a and Table 1a below.
NTS 02-G Ver. 3.05R
(C) 2013 Sn60348
WAITING FOR SATS
GPS RX STAT: 00A
UTC+1200 17MAR13
076 11:16:53 87P
LST: TUE 17MAR13
076 11:16:53 87P
Fixed:
192 . 168 . 96 . 10
UTC: MON 16MAR13
075 23:16:53 87P
*** ANT L ***
075 23:16:53 80P

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LST: TUE 17MAR13
076 11:16:53 87P
When the NTS 02-G is synchronized from an IRIG-B source, this field directly indicates the sync source.
(See example for “SLC” source in Figure 4b). Table 1b shows the alternate sync sources supported by the
NTS 02-G.
Satellites in sky
Satellites tracked
GNSS Receiver Mode
LCD INDICATORS Table 1a – GNSS Status
Character
Values
Description
Satellites
in the sky
“0 - 9”: 0 - 9
“A - E”: 10-
14
“F”: >14
Represents the total number of satellites currently present in the sky
according to the GNSS almanac. “0” in this position means that NTS 02-G
has lost its knowledge of the GNSS satellites’ orbit geometries. This occurs if
the unit has been in storage for an extended period, or if the GNSS receiver
has been reset. It may take up to two hours for the NTS 02-G to operate
normally again.
Satellites
tracked
“0 - 9”: 0 - 9
“A - E”: 10 –
14
“F”: >14
This digit represents the number of satellites currently being used to
compute the time solution. A “0” value means that no updated time
solution is available, (“out of lock” condition). If this condition persists for
the “Holdover” time the NTS 02-G will indicate “out of sync” as described
under LED Indicators section below.
GNSS
Receiver
Mode
“A”
NTS 02-G in Acquiring mode - attempting to get satellite fixes.
“G”
“Bad geometry”: Satellites are positioned in almost a straight line so best
accuracy cannot be obtained, but the unit will still attempt to synchronize
to UTC.
“S”
Site Survey in progress. NTS 02-G is synchronized and is refining the
position calculation for higher precision. Once complete the mode will
change to Position hold.
“P”
“Position hold”: Position is now known precisely, and the NTS 02-G is
providing its most accurate time, typically within 40 ns of UTC.
Figure 3a - GPS Receiver Status Figure 4b - IRIG-B Source
LST: TUE 17MAR13
076 11:16:53 SLC

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LCD INDICATORS Table 1b – Alternative Sync Source
Character
Values
Description
Alternate
Sync
Source
“PTP” The NTS 02-G is synchronized to a PTP grandmaster
“NTP” The NTS 02-G is synchronized to an NTP server
“SLC”
The NTS 02-G is synchronized to an IRIG-B source on P2 input
“Slave:Copper”
“SLF”
The NTS 02-G is synchronized to an IRIG-B source on the Fiber input The
“Slave:Fiber”
“TST” The NTS 02-G is operating with manually set time.
If the time server is configured to synchronize to IRIG-B only (ignore GNSS) then “SL?” will be
displayed in the status field if there is no IRIG-B signal input or an invalid signal input.
Contrast Adjustment Mode
The LCD contrast can be adjusted by entering the Contrast Adjustment Mode. This mode is entered by
holding down the button on the front panel for approximately 3 seconds.
Once in Contrast Adjustment Mode, pressing the button will lighten the contrast and decrease the
contrast by one level. The LCD will cycle from the darkest to the lightest if the button is pressed when
on the lightest setting.
To exit the Contrast Adjustment Mode, hold down the button on the front panel for approximately 3
seconds again. The button will return to normal operation after this.
LED Indicators
The SYNC LED shows the status of the sync source. The various states are shown as follows: -
Off: The NTS 02-G has no power.
On: The NTS 02-G is synchronized to the source indicated by the LCD display
Slow Flash (1 flash per second): The NTS 02-G is operating in the “holdover” state (holdover timer
running) or is operating in the “tuning” state (timer server is gaining synchronization)
Fast Flash (5 flashes per second): The NTS 02-G is not synchronized. “Out of Sync” condition
The ALM LED indicates the internal alarm status of the NTS 02-G. It has only two operating states: -
Off: The NTS 02-G is operating normally, i.e., there are no alarms.
Fast Flash (5 flashes per second):At least one alarm is active. Refer to the alarm window in the Clock tab
of the Configuration Tool to find the name of the active alarm(s). A shorthand version of the alarm name

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will also appear on the LCD. Refer to the Specification Alarm table below for the details on each alarm
by name.
Table 2 - Alarm Specification
LCD Alarm
Alarm Name
Specification
Sats
Satellites
Low
The number of satellites currently being used for time and position
calculations is below the threshold.
Sync
No Sync
The NTS 02-G is not synchronized to any source, or holdover period has
expired, or the timing output inaccuracy has been exceeded.
Hold
Holdover
The NTS 02-G has lost synchronization to any source and is now in
holdover.
AntL
No Antenna
The antenna circuit current drain is low (typically under 3mA). This could
be caused by:
•poor connections
•the connected antenna having a lower current drain specification
•a component in the antenna system providing power to the
antenna and therefore the time server is not seeing a connected
load
•
there being no antenna connected
AntH
Antenna
Short
The antenna circuit current drain is high (typically over 100 mA). This is
caused by a short in the antenna circuit, or by moisture ingress in the
circuit, or if the antenna connected has a higher current drain
specification.
N/A*
Antenna
Fault
This alarm is generated if there is high current or low current detected on
the antenna input.
Factory
Reset Cycle
Power
Factory
Reset Armed
This alarm is generated if the Forgotten Password Reset (Factory Reset
Process) is enabled and has been initiated by the user.
IRIG
No IRIG-B
Input
No valid IRIG-B source is detected on the NTS 02-G input. This message
only appears if the NTS 02-G is configured with IRIG-B monitoring
enabled.
N/A*
Overcurrent
The NTS 02-G supports output current monitoring and has detected
excessive current on one or more outputs. Check the I/O tab to identify
which output is experiencing the fault.
IPeX
ETHx
Address
Fault
This alarm comes up when the DHCP server is unavailable or when the IP
address is assigned to some other node in the network and cannot be
assigned to the port. Under such situations the port defaults to a link local
address.
eX represents the port number which has the alarm. For example, IPe1
indicates address fault alarm on ETH1.
SYNC
FORCED ON
Sync Forced
This alarm is generated when the “Never leave Sync (Test Mode)” option
has been selected.
*Note: N/A indicates that this alarm does not appear on the LCD.

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USB Port
A second Admin port (USB type B) is provided to support local configuration/administration. The USB
port has the same configuration options as the Admin Ethernet port 1. The configuration software
supplied with the NTS 02-G supports both USB and Ethernet configuration. A USB driver for the NTS
02-G can be downloaded from www.support.tekron.com. The NTS 02-G can be configured through the
USB admin port only, to add an extra security layer.
Figure 5 – USB Admin Port