Elproma NTS-pico Manuale utente

NTS-pico

Miniature NTP Time Server for Small Networks

Table of Contents

Introduction ................................................................................................................................ 3

Safety instructions................................................................................................................................3

What is NTS-pico?.................................................................................................................................3

Installation .................................................................................................................................. 4

Hardware .............................................................................................................................................4

General presentation............................................................................................................................4

Antenna Mounting ...................................................................................................................... 6

Additional lightning protection considerations ......................................................................................7

Powering up ...............................................................................................................................10

Basic SETUP ................................................................................................................................10

IP addressing ...................................................................................................................................... 10

Monitoring GNSS satellite signals ON-LINE ..................................................................................12

Running NTP (Network Time Protocol)........................................................................................13

Configuring NTP.................................................................................................................................. 13

Monitoring NTP on-line ...................................................................................................................... 14

Synchronizing Microsoft Windows clcok.............................................................................................. 15

Synchronizing Linux & Mac OSX clock.................................................................................................. 15

Running PTP (Precision Time Protocol)........................................................................................16

APPENDIX...................................................................................................................................18

Technical Specification................................................................................................................18

GNSS Antenna .................................................................................................................................... 18

Introduction

Safety instructions

Except external power supply (230VAC), this equipment contains DC (3-12VDC) voltages.

Do not handle any metallic part until the 230VAC power supply has been disconnected! Do

not assemble, disassemble set when the power reminds switched ON. Making wiring and

touching cables is strongly prohibited when power is ON. Never work alone under hazardous

voltage conditions. Always check that the power cord(s), plug(s), and sockets are in good

conditions. Always use qualified service personnel to install permanently wired equipment

and surge antenna arrestors.

What is NTS-pico?

NTS-pico is a complete, stand-alone, miniature NTP Time Server. Optionally it supports PTP

too. It works in Ethernet TCP/IP environment. It has been designed to provide a stable UTC

(Coordinated Universal Time) synchronization, which possesses the long-term stability of

GNSS (Global Navigation Satellite System) to small industrial local networks up to 10 PC.

The standard synchronization accuracy is level of hundreds of millisecond [ms] for LAN and

it is sub-tens of second [s] for Internet. Therefore, NTS-pico is not time instrument and should

not be use at scientific, laboratory or advanced IT synchronization environments.

NTS-pico id dedicated for up 10 pcs networks

The NTS-pico GNSS receiver is designed for automatic operation without the need for user

intervention. It can however, be accessed via a serial port (rs232 or USB) for configuration

and debug purposes. If the satellite signal is interrupted, the NTS-pico enters a FREE RUN

mode. NTS-pico is not including internal OSC and therefore it is not supporting HOLDOVER

mode. When the GNSS signal is restored, the GNSS receiver automatically reverts to normal

operation mode. For this reason, it is important to continuously trace the performance of

GNSS signals and synchronization process. Followingsynchronization Ethernet protocols are

supported:

•NTP Network Time Protocol (rfc5905)

•SNTP Simple NTP (rfc 4330)

•PTP Precision Time Protocol IEEE1588:2008 /extra option/

Referential UTC is drawn from GPS & Glonass via built-in Telit GNSS receiver, using

NMEA183 frame. NTS-pico does not support 1PPS frequency reference.

Installation

Hardware

The NTS-pico box on arrive includes:

1. NTS-pico miniature time server (pcs 1)

2. Power supply 12VDC/230VAC (pcs 1)

3. Indoor GSM antenna (pcs 1)

4. Outdoor active GPS antenna w/ 30m coax H-155 and accessories (pcs 1)

Options (not included in standard set):

5. Ethernet cable 1m RJ45/RJ45 (pcs 1)

6. RS232 cable 1m DB-9/RJ45 (pcs 1)

7. CD with PDF manual (pcs 1)

NTS-pico set

Note! Set does not include antenna mast, but antenna can be mounted directly using

attached accessories: claps, bracket, nuts etc. - they are included.

General presentation

NTS-pico includes:

•1x GPS (SMA)

•1x Pwr (VDC)

•1x LAN (RJ45)

•1x RS232 (RJ45)

•1x USB

•1x GSM (SMA)

•1x SIM socket

NTS-picture view

Special version of NTS-pico can include extra:

•1x Wi-Fi(SMA)

•1x SIM socket #2

•1x CAN-bus I/O

antenna mounting accessories

Antenna Mounting

Installing a basic system will require the following (a) mounting of the antenna (b) optionally

mounting 1 or 2 lightning arrestors (not included to product set). The antenna supplied is

of the active type, and is suitable for almost all applications. It is supplied with a pre-attached,

30-meter H-155 coax cable, terminated with a male SMA connector. Before commencing

installation, check that all the items detailed in the contents list have been supplied. The

antenna is supplied with mounting clamps for attachment to a mounting pole, included too.

Mast antenna suspension (H=0.5m) is not included but it is available as separate products

from Elproma. Following figure shows an example of how mounting antenna might be

achieved.

Mounting GNSS antenna

Note! The most important consideration in selecting a position for the antenna is the presence

of objects which obscure the sky or horizon. Where possible, there should be no obstruction

to a full view of the sky.

Overhead wires and other very narrow obstructions may be considered as invisible to the

signals, provided that they are a few meters away. Large flat surfaces can decrease

performance of the receiver. Be especially wary about mounting the antenna directly onto the

fascia of a flat roof. To overcome this situation, elevate the pole about 1 meter above the flat

surface. A satellite prediction mobile phone program may usefully be employed to check a

potential installation, and also to identify directions in which obstructions may be a particular

source of problems.

Note! When the NTS-pico is operational, the GNSS antenna assembly may be disconnected

for short periods (e.g. maintenance or repair) without interruption to the unit synchronization

LAN output.

Additional lightning protection considerations

As the antenna is roof mounted (to have a clear view of the sky) it is likely to be exposed to

lightning strikes.

Protection against this is afforded by ensuring adequate grounding of the mountings as

described below. There is no way to provide 100% protection for electronic equipment from

direct strike damage. It is possible however, to reduce the likelihood of damage from near

strike induced fields by ensuring the installation obeys some fundamental rules. A proprietary

lightning arrestor should be installed, of a type which does not reduce GNSS signal transfer.

Install the lightning arrestor near to the antenna (e.g. on the mounting pole), ensuring all

connections maintain electrical and environmental protection. After taking the precautions

described previously in the antenna installation, it should be understood that a destructive

residual current may still be present in the cable coming down from the antenna to the NTS-

pico unit. A second lightning arrestor should be installed near to the NTS-pico to further

dissipate any remaining lightning energy. At the earth end please use multiple connection

points if at all possible. All connections should incorporate as large an area of contact as

possible. This may be achieved by using large bolts, and washers of substantial diameter. All

connections should incorporate as large an area of contact as possible, which is made more

probable by the use of large bolts, and substantial washers. Where there is no access to the

metal framework of the building, it is absolutely imperative to erect a suitable lightning

conductor. Failure to do so is almost certain to result in destruction of NTS-pico and

connected into it equipment in the event of the antenna receiving a near lightning strike.

Grounding system

NTS-pico surge protection

Powering up

1. Connect GNSS antenna to SMA connector at NTS-pico

2. Connect Ethernet LAN cable to RJ45 connector

3. Plug-in DC power supply to power input and turn power ON

Basic SETUP

Go to your web browser and put IP address 192.168.1.234/255.255.255.0.

You will be asked for username and password. By defaults are:

Username: admin

Password: 12345

IP addressing

Minimum configuration requires setup IPv4

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