Tekron Nts 02-g User manual

NTS 02-G

USER MANUAL

 
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© 2020 by Tekron International Limited. All Rights Reserved. All trademarks are the property of their respective holders. The information in this 
document is provided for informational use only and is subject to change. For further information or support, go to: ww.tekron.com. 
 
 
 
 
 
 
Contents 
Contents..............................................................................................................................................................................................................................2 
1. Introduction.....................................................................................................................................................................................................4 
2. Front Panel.......................................................................................................................................................................................................6
LED Indicators............................................................................................................................................................................................................................9 
USB Port:.....................................................................................................................................................................................................................................10 
3. Back Panel.......................................................................................................................................................................................................11
P1 Power Input..........................................................................................................................................................................................................................11 
Earth Stud (M4 Nut)..............................................................................................................................................................................................................11 
Ant: Antenna Connector (SMA Connector)..............................................................................................................................................................11 
Antenna and Lead-in Cable Considerations............................................................................................................................................................12 
P2: IRIG-B Input (3-pin 3.81 mm Connector)............................................................................................................................................................12 
P3: Programmable Output (3-pin 3.81 mm Connector).....................................................................................................................................12 
P4: Alarm Relays (4-pin 3.81 mm Connector).........................................................................................................................................................13 
ADMIN/ETH 1: Ethernet Administration Port (RJ45).........................................................................................................................................13 
ETH 2 & ETH3 Ethernet Communication Ports (RJ45)................................................................................................................................14 
4. Software...........................................................................................................................................................................................................15 
Configuration Tool.................................................................................................................................................................................................................15 
USB driver...................................................................................................................................................................................................................................15 
5. Factory Hardware Options...................................................................................................................................................................16 
Power Supply Options.........................................................................................................................................................................................................16 
Slave Only Option (Fiber input)......................................................................................................................................................................................16 
1. INSTALLATION...........................................................................................................................................................................................17
Identification.............................................................................................................................................................................................................................17 
Location.......................................................................................................................................................................................................................................17 
Power Supply............................................................................................................................................................................................................................17 
Hazardous Voltage................................................................................................................................................................................................................17 
Mounting the NTS 02-G.....................................................................................................................................................................................................17 
Operation....................................................................................................................................................................................................................................18 
2. Appendix..........................................................................................................................................................................................................19

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NTS 02-G Specifications....................................................................................................................................................................................................19

3. Warranty Statement................................................................................................................................................................................20

4. Notes.................................................................................................................................................................................................................20

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1. Introduction

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

NTP protocol. 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 of the Ethernet ports. It follows, therefore in

terms of Network Time Protocol (NTP) definitions, that all NTS 02-G Ethernet Ports are Stratum 1 sources.

The NTS 02-G product is ideally suited for use in industrial environments and can provide NTP 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

Figure 1 NTS 02-G: front and back panels

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The NTS 02-G features an administrative 10/100 Mb Ethernet port through which the units inputs and

outputs can be configured.

Configuration software which is available to download from www.tekron.com. Optional accessories include

antenna, low loss antenna cable, antenna pipe mounting components and lightning protection kit.

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 status of the current sync source.

ALM LED: This LED shows the alarm status of the NTS 02-G.

ADMIN (USB) Port: This port may be used to configure the clock using the Tekron Configuration Tool

available for download on the Tekron website.

LCD Display:

On initial power-up, the LCD display shows a copyright message, along with the serial number and revision

level of the unit (See figure 3a). Approximately 10 seconds after power-up, if the NTS 02-G is operating in its

default mode as a GNSS-synchronized Grand Master 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 the user can access by pushing 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 screen

share shown below:

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3a Start up (Clock ID)

3b Waiting for satellites

3c Operating default

3d Local time

3e UTC Time

3g IP Address

3f - Alarm

Figure 3 LCD display screens

of screen 3c

time day-of-year and time-of-day are on the bottom line.

Screen 3c shows that the clock 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.

Screen 3d shows the same time and date, but also indicates that the time displayed is Local Standard Time,

in screen 3d

Screen 3e shows the UTC time and date which is 11:16:53 on the evening of Monday 17th March 2013.

Screen 3g shows the basic Ethernet network settings for Admin/ ETH 1 port. In this example it shows the

port has been configured with a fixed 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 side of the display. When the NTS02-G is operating in its default modeas a GNSS-synchronized Grand

Master, this field provides further details about the GNSS function as shown in fig 4a and table 1a below.

When the NTS 02-G n IRIG-B source, this field directly indicates the sync source. (see

SLC alternate sync sources supported by the NTS 02-G.

NTS 02-GVer. 3.05R

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

Satellites in sky

Satellites tracked

GNSS Receiver Mode

LED INDICATORS Table 1a GNSS Status

Character

Values

Description

Satellites

in the sky

- 9 : 0 - 9

- E : 10-14

Represents the total number of satellites currently present in the sky according

to the GNSS NTS 02-G has lost its

knowledge of the GNSS

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

- 9 : 0 - 9

- E : 10

This digit represents the number of satellites currently being used to compute

see

3.6 below as described under (2.1) below.

GNSS

Receiver

Mode

NTS 02-G in Acquisition mode - attempting to get satellite fixes.

best accuracy cannot be obtained, but the unit will still attempt to synchronize

to UTC.

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.

now known precisely, and the NTS 02-G is providing

its most accurate time, typically within 40 ns of UTC.

LED INDICATORS Table 1b Alternative Sync Source

Character

Values

Description

Alternate

Sync

Source

SLC

Clock is synchronized to an IRIG-B source on P2 input

Clock is synchronized to an IRIG-B source on the Fiber input

function for further details

If the clock is configured to synchronize to IRIG-B only (ignore GNSS)

Figure 4a GPS Receiver Status Figure 4b IRG-B Source

LST: TUE 17MAR13

076 11:16:53 SLC

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will be displayed in the status field if there is no IRIG-B signal input.

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 -

running)

Fast Flash (5 flashes per second): The NTS 02-G is not synchronized.

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): Alarms are active. In this case, the actual alarm state is shown on the top

line of the LCD display, replacing the normal date information (see example infig 3f above).

Alarm State

Definition

*PwrA*

Power A: Power is not present on the Power A (P1A) input

*PwrB*

Power B: Power is not present on the Power B (P1B) input

*Hold*

Holdover: The clock has lost sync, but the outputs are still active and indicating the

appropriate loss of accuracy (oscillator drift).

*Sync*

Lost sync: The clocks has lost sync, the holdover time has expired and the outputs are not

active

*AntL*

Antenna Low: An under-current state has been detected on the antenna input (antenna

disconnected)

*AntH*

Antenna High: An over-current state has been detected on the antenna input (antenna

short circuit)

*Sats*

Satellites Low: The number of satellites have fallen below the user configured threshold

*IRIG*

No IRIG-B Input: This alarm appears when IRIG-B input monitoring is enabled and there is no

IRIG-B input signal.

*IPex*

Link Local Address: The port has been configured for DHCP and could not obtain an

address, and has rolled back to a linked local address: 169.254.X.X.

eX represents the port number which has the alarm.

Table 1 - Alarm Definitions

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USB Port:

A USB port (type B) is provided to support local configuration/administration. The NTS 02-Gconfiguration

software supports both USB and Ethernet configuration.

3. Back Panel

Examples of the NTS 02-G back panel are shown (See figures 5 & 6). The unit appearance varies depending

on the types of Ethernet modules fitted (orderable factory options).

Figure 5 Rear panel of NTS 02-G with Copper Outputs

P1 Power Input

Power is applied to the NTS 02-G via P1, a 5.08 mm 3-pin connector. DC power should be

applied to pins L and N. Despite the L and N markings, DC polarity is not critical, but only Pin

L is fused internally. Maximum steady state power consumption is 6 Watt, and surge

protection is provided. Both electronics and case are isolated from the power supply inputs,

enabling the use of positive earth, negative earth or fully floating supplies. The mating

connector (supplied) accommodates wire sizes up to 1.5 mm2. The input voltage range is

marked on the label located below the P1 connector.

Check the label on the unit base for power supply voltage ratings before applying power.

Earth Stud (M4 Nut)

An M4 bolt (to chassis) is provided for earthing ofcable shields.

Ant: Antenna Connector (SMA Connector)

which should

be connected using a high quality low-loss 50Ωcoaxial cable. 5 V DC (100 mA max) is

supplied to the center conductor to power an active antenna. The GNSS receiver inside

the NTS 02-G is a high-sensitivity unit that supports a wide range of antenna and lead-in

cable combinations. The overall gain of the installed antenna system (antenna gain less the combined losses

in cable, connectors and any amplifiers/splitters/protection devices included) must fall in the range of 0dB

to 40dB, with 5dB to 35dB preferred.

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Care should be taken to ensure that the connector is not cross-threaded when attaching the

antenna lead-in cable. The connector should be tightened firmly by hand only. Do NOT over-

tighten! Ensure the antenna SMA male connector center pin is straight before plugging in.

Antenna and Lead-in Cable Considerations

NTS 02-G is typically ordered with a timing-optimized narrow-band antenna with nominal gain of 38dB.

When coupled with a 30m lead-in cable (CNT-240) anda lightning protectiondevice, this combination yields

an overall gain of around 23dB, comfortably within the preferred range. For lead-in lengths longer than about

75m, amplification and/or larger diameter, lower loss cable should be considered and can be supplied to

order.

CNT-240 33dB/100 m. (10dB/100ft) Plus 1 dB/connector

Preferred Length Range: 6m to 70m (20ft - 230ft)

Maximum Length: 100m (330ft)

CNT-400 17dB/100 m. Plus 1 dB/connector

Preferred Length Range: 12m to 138m (40ft - 450ft)

Maximum Length Range: 4m to 190m (13ft - 625ft)

Note: The examples shown above are based on an average GNSS signal strength of -130 dBm at sea-level

and assume that the antenna is positioned with a clear view of the sky, with a lightning protection device

fitted in the lead-in cable. It is highly recommended that such a device be installed. A suitable lightning

protection device complete with additional cable connectors, connector crimping tool, and mounting

hardware is available as an optional kit. The lightning protection device inserts a further 2.5dB of loss into

the antenna system (largely due to the loss in the additional connectors). This is equivalent to 8m (25ft) of

CNT-240 cable, or 4 m (13ft) of CNT-400 cable.

Care should be taken to ensure that the connector is not cross-threaded when attaching the

antenna lead in cable. The connector should be tightened firmly by hand or by a SMA torque

wrench only. Do not over tighten.

A lightning protection device should be inserted into the antenna lead. A suitable device complete with

additional cable connectors, a connector crimping tool and mounting hardware is available as an option

(Error! Reference source not found.). Introduction of the lightning protector does not degrade the

performance of the antenna system.

P2: IRIG-B Input (3-pin 3.81 mm Connector)

This port accepts an RS422 format un-modulated IRIG-B signal (B004 + C37.118.1 extensions).

When configured appropriately, the NTS 02-Gcan synchronize to this source rather than the

internal GNSS receiver, thus operating as a slaved device from another NTS 02-GMaster source.

Connection of the incoming RS422 line (120 Ωtwisted pair recommended -

of the mating connector. , and can be

- in the mating connector.

P3: Programmable Output (3-pin 3.81 mm Connector)

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The default output is an un-modulated IRIG-B signal (B004 + C37.118.1 extensions) in RS422

- of the pluggable connector. It can be used as the Master Source signal

to drive the P2 inputs of one or many Slave NTS 02/03-G units on the IRIG-B timing pulses (both

leading and trailing edges) from this port is typically to within 100ns of UTC. A TTL-compatible

output signal (single-ended, 0V referenced) can be obtained by connecting the signal cable to

to - .

P3 is a programmable RS422 output that may be configured to output in either inverted or non-

inverted polarity:

•A configurable number of pulses per second, minute, hour, day with adjustable pulse-width and

offset.

•IRIG-B time code (Un-modulated DCLS or Modified Manchester) with option C37.118.1 or Afnor

extensions.

•DCF-77 time code simulation.

P4: Alarm Relays (4-pin 3.81 mm Connector)

The port provides two alarm output channels. The alarm outputs are type A (normally-open)

dry contact types. - -energized state of the

relay. The NTS 02-G operates with the alarm relays energized during normal operation, and de-

energized in the alarm state. It follows that, in the event of all power to the clock being lost,

both of - symbols are

included for reference purposes only, as the alarm contacts are not polarized.

P4 A is a GNSS signal fail (antenna disconnected or antenna short (over-current)) alarm. Activation of the

alarm (opening of the contact) is delayed by 10 seconds from the onset of the triggering condition.

P4 Bis a synchronization fail alarm. This alarm is active (contact open) when the unit is initially powered on,

and remains active until synchronization is achieved. The contact then closes, deactivating the alarm. If a

loss of synchronization later occurs, then the NTS 02-G

defined . again activated

(contact open).

default setting is 1 minute.

ADMIN/ETH 1: Ethernet Administration Port (RJ45)

The Ethernet administration port (ETH1), features an RJ45 connector and supports

10/100 Mbps, Auto MDX & Auto Negotiate. The LEDs convey Link (LNK) and Activity

(ACT) status for the port. This port is used to configure the clock via the Tekron

Configuration Tool which is available for download on the NTS 02-G page on the

Tekron website.

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ETH 2 & ETH3 Ethernet Communication Ports (RJ45)

The second and third Ethernet communication ports (ETH2 & 3), feature RJ45 (10/100

Mbps, Auto MDX & Auto Negotiate). The LEDs convey Link (LNK) and Activity (ACT)

status for the associated port.

NOTE:

The NTS 02-G features absolute security between all ports, so that no Ethernet paths exist between

any of the three Ethernet ports. For this reason, the NTS 02-G does not support hub, switch or router

functions.

4. Software

Configuration Tool

The NTS 02-G can be configured via USB or Ethernet. The configuration tool can be downloaded from the

NTS 02-G product page on the Tekron website (www.tekron.com/nts-02-g). By default the unit is shipped

with DHCP enabled for automatic IP address assignment, with a fall back to linklocal addressing

(169.254.xxx.xxx) if no DHCP server is present.

Default Username: admin

Default Password: Password

NOTE:

The user is required to change the default password on first login.

USB driver

The USB driver can be downloaded from the NTS 02-G product page of the Tekron website

(www.tekron.com/nts-02-g).

5. Factory Hardware Options

Power Supply Options

This table shows the three different power supply options that can be ordered with NTS 02-G.

Designator

Input Range

High Voltage (3 pin)

85 - 265 Vac / 90 300 Vdc

Medium Voltage (3 pin)

20 75 Vdc

Low Voltage (3 pin)

14 36 Vdc

Slave Only Option (Fiber input)

The NTS 02-G can be ordered as a slave-only device in which case, the SMA Antenna Jack is removed, and

an ST Fiber receiver port (multi-mode) is fitted instead. The unit will then synchronize to an incoming IRIG-

B signal on either P2 (RS422 format signal required) or on the Fiber input.

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1. INSTALLATION

Identification

Each NTS 02-G unit is shipped with identification labels on the base and side. The label provides details of

the particular options fitted to the unit, the power supply requirement and serial number.

Check the identification label on the base of the unit to ensure that the correct model has been

supplied before proceeding to install!

Location

The unit is intended for installation in restricted access areas. A restricted access area can be

accessed only using a lock and key or other means of security. Installation is to be done by suitably

qualified personnel.

Power Supply

The input voltage range is marked on the product label on the chassis. Do not apply voltage

outside the range noted. Note that either supply polarity is acceptable due tointernal rectification.

HazardousVoltage

Up to 300V may be present at the Power Input port P1. Up to 200V may be present at the Alarm Relay port

P4. These voltagesare supplied to the unitonly, and not generated by the unit. However, the installer must

exercise care in wiring the associated plugs to ensure bare copper is not accessible.

Earthing

The unit must be safety earthed whenever it is powered on, using the earthterminal as pictured

above. The cable cross section must be equal to or greater than 0.75 mm2 (18 AWG).

Mounting the NTS 02-G

The clock can be used free- -mount bracket

which can be attached by removing the 4 corner front panel screws and attaching the plate as illustrated in

Figure 5.

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Figure 5 NTS 02-G with rack-mount bracket

Operation

Check the label on the base for voltage requirements before switching on!

Connect the antenna lead and the antenna (with a good view of the sky). Then connect the power

source to P1.

The time required that will achieve tracking and synchronization given a goodview of the sky is typically

within a minute. Reactivating a unit that was previously synchronized thousands of kilometers away from the

present position will take longer but not more than 45 minutes.

As described in Error! Reference source not found., the button on the front panel will toggle the display on

the LCD and can also enter the Error! Reference source not found..

Once powered up, the operator can determine correct operation of the NTS02-G by observing the LEDs. The

ALM LED should be off and the SYN LED should be on solid. If the LEDs are flashing, refer to (section 3) for

an explanation of the status.

To reset the unit, the power must be cycled. To cycle the power, it is recommended that the external power

source switch that the device the NTS 02-G is connected to; is turned OFF, wait a full ten seconds, and then

turned ON again. This will result in the NTS 02-G having to resynchronize with the GNSS satellites.

2. Appendix

NTS 02-G Specifications

Physical Specifications

Dimensions

Width

160 mm

Depth

155 mm

Height

40 mm

Weight

800 g

Operating Temperature Range

-10 ~ + 65 oC

Storage Temperature Range

-40 ~ + 85oC

Operating Humidity

10 ~ 95 % non-condensing

Electrical Specifications

Power Supply

Low Voltage

14 ~ 36 Vdc

Medium Voltage

20 ~ 75 Vdc

High Voltage

90 ~ 300 Vdc / 85 ~ 265 Vac

Power drain (Copper Eth)

4W max

Protection

Surge and Transient

Isolation

Power In to NTS: 3.0 kV

NTS to Alarm outputs: 3.5 kV

NTS to Ethernet: 1.5 kV

Input & Output Specifications

Ethernet Port (Administrator)

RJ45

10/100 BASE-T

Isolation

1.5 kV

Ethernet Ports (2 & 3)

RJ45

10/100 BASE-T

Isolation

1.5 kV

USB Port

Type B

P2 Input

Voltage level

RS422

Sensitivity 200 mV

P3 Output

Voltage level

RS422

Capable of driving 50

unit loads from 3.3V (1

V out @ 80 ma)

P4 Relay

Isolation

3.5 kV

Max contact rating

300 V @ 100 mA (AC

or DC)

GNSS Receiver

L1/GLONASS (1575.42 / 1598 MHz) Frequency, C/A Code, 32 Channel, parallel-tracking receiver

Position

Accuracy

Horizontal

<9 m (90%)

Altitude

<18 m (90%)

Timing Accuracy

<15 ns to UTC

Acquisition

Reacquisition

<2 s (90%)

Hot Start

<18 s (90%)

Cold Start

<50 s (90%)

Sensitivity

Acquisition

-155 dBm

Tracking

-160 dBm

Antenna output voltage

5 V

Antenna output current

100 mA (Max)

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3. Warranty Statement

http://tekron.com/about-tekron/warranty

WARNING:

This product has been designed to comply with the limits for a Class A digital device pursuant to Part 15 of

FCC rules. These limits are designed to provide reasonable protection againstsuch interference when

operating in a commercial environment.

4. Notes

The information in this manual may change without notice. The manufacturer assumes no responsibility for

any errors that may appear in this manual.

Ethernet is a trademark of XEROX Corporation. Windows, Windows 95, Windows 98, Windows 2000,

Windows NT, Windows XP, Windows Vista, and Windows 7

be transmitted or reproduced in any form or by any means without the written permission of Tekron

International Ltd. Published in New Zealand.

This product has been manufactured by Tekron in New Zealand. For more information on Tekron or it's

products please visit our website at www.tekron.com.

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