Black Box LEU9070, LEU9071, EHNU9070, EHNU9071 User Manual

GPS Network Time Server

GPS Network Time Sever:
LEU9070

GPS Antenna 25dB:
LEU9071

Antenna Cable (25 metres):
EHNU9070

Configuration Cable:
EHNU9071

TECHNICAL:

SALES:

FAX:

ADDRESS:

WEB:

[phone]
[phone]
[phone]
464 Basingstoke Road, Reading, Berkshire RG2 0QN
www.blackbox.co.uk

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GPS Network Time Server

SALES: 0118 965 5100

How To Contact your Local Black Box

Italy: Australia:

Black Box Italia S.P.A Black Box Catalog Australia PTY LTD
Tel: [phone] Tel: [phone]

Fax: [phone] Fax: [phone]
Web Site: www.blackbox.it

Deutschland: Brazil:

Black Box Deutschland Black Box Do Brasil.
Tel: [phone] Tel: [phone]

Fax: [phone] Fax: [phone]
Web Site: www.blackbox-deutschland.com Web Site: www.blackbox.com.br

Switzerland: Canada:

Datacom Black Box Services AG Black Box Canada Corp.

Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
Web Site: www.black-box.ch Web Site: www.blackbox.com

Netherlands: Mexico:

Black Box Datacom BV Black Box De Mexico S.A. de C.V

Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
Web Site: www.blackbox.nl/ Web Site: www.blackbox.com.mx

Belgium: Japan:

Black Box Black Box Catalog
Tel: [phone] Tel: [phone]

Fax: [phone] Fax: [phone]
Web Site: www.blackbox.be Web Site: www.blackbox.co.jp/

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GPS Network Time Server

TECHNICAL: 0118 965 6000

France: U.S.A

Black Box Catalogue Black Box Corporation

Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
Web Site: www.blackbox.fr Web Site: www.blackbox.com

Spain: Chile
Black Box Comunicaciones S.A. Black Box Chile

Tel: [phone] Tel: [phone]
Fax: [phone] Fax: [phone]
Web Site: www.blackbox.es Web Site: www.Blackbox.cl

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GPS Network Time Server

SALES: 0118 965 5100

Contents

Introduction..............................................................................................................................................6

Product Description..................................................................................................................................7

General.......................................................................................................................................7

Standard functions......................................................................................................................8

Dimensions and weight............................................................................................................... 8

Front and rear panel drawings....................................................................................................8

Quick Start Guide...................................................................................................................................10

Step One – connecting the server to a configuration terminal...................................................10

Profile name.................................................................................................................11

Port…….......................................................................................................................11

Log File ………………………………………………………………………………………..11

Clock Name.................................................................................................................11

Target….......................................................................................................................11

Step 2 – Connection to the Network.........................................................................................11

Step 3 – Connecting the antenna..............................................................................................11

Step 4 – Positioning the antenna..............................................................................................11

Step 5 – Using the software...................................................................................................... 11

Step 6 – Enabling servers to use the GPS Network Time server over your network.................12

Start-Up..................................................................................................................................................13

Preliminary connections............................................................................................................13

Connection quality.................................................................................................................... 14

Starting the clock...................................................................................................................... 14

Operating faults.........................................................................................................................16

Setting out of service................................................................................................................16

Operation...............................................................................................................................................17

Adjusting to UTC time...............................................................................................................17

Time keeping............................................................................................................................ 17

NTP server operation................................................................................................................18

Maintenance..........................................................................................................................................19

Performance Characteristics..................................................................................................................20

Environment..............................................................................................................................20

Internal time generation............................................................................................................20

Frequency outputs.............................................................................................................. ......20

NTP reference accuracy...........................................................................................................20

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GPS Network Time Server

TECHNICAL: 0118 965 6000

Input/Output Characteristics...................................................................................................................22

Power supplies..........................................................................................................................22

"Antenna" input.........................................................................................................................22

"RS 232" output (J4).................................................................................................................23

"1-pps" output (J5)....................................................................................................................23

"FREQ." Outputs (J6, J7, J8, J9)..............................................................................................24

"IRIG" output.............................................................................................................................25

"AUI" output..............................................................................................................................25

"10BaseT" output......................................................................................................................25

"ALARM" output (J1).................................................................................................................26

"TOD" output (J3)......................................................................................................................26

Terminology...........................................................................................................................................28

Glossary.................................................................................................................................................29

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GPS Network Time Server

SALES: 0118 965 5100

Introduction

This manual is the installation and operating manual for the GPS Network Time Server and
accessories.

• GPS input antenna,

• Mains power input (90 to 265V / 48 to 63 Hz),

• DC power supply input (18 to 32 VDC),

• Four 10 MHz outputs (>10 dBm / 50),

• 1-pps output (TTL / 50),

• Time stamp output (RS232C),

• Alarm output (relay contact),

• Remote control interface (RS232C),

• Ethernet output, 10 MHz, AUI or 10BaseT,

• IRIG output, NFS 87-500 standard compliant.

The manual describes the device components, on-site installation, commissioning, operation
in regular service, troubleshooting information and user-accessible maintenance.

A summary of performance and a description of the clock inputs/outputs are also given for
information.

The product-specific terminology is explained in on page 24. The main abbreviations used in
the document are detailed in the glossary.

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GPS Network Time Server

TECHNICAL: 0118 965 6000

Product Description

General

The GPS Network Time Server meets the precise synchronization and syntonization
requirements of local and remote users.

The GPS Network Time Server offers highly accurate and stable frequency sources
synchronized and slaved on the reception of signals transmitted by the GPS satellite
constellation.

The clock operates on a stand-alone basis, in a predefined setting. This configuration can be
modified by the user, via the remote control interface.

The clock integrates a GPS receiver used to deliver, at user level, the time/frequency
reference broadcast by the GPS system. It autonomously uses the integrity aspects of this
system (TRAIM); i. e. it automatically rejects the signals transmitted by satellites considered
as faulty, which might impair the clock’s performance.

The time reference thus obtained is processed by high performance algorithms, which control
the internal frequency pilot of the unit. The system is used to distribute frequency and time
signals (1-pps second signal) locally, and time stamp and synchronization messages remotely,
via Ethernet network under IP or by IRIG signal over amplitude coded on s ymmetrical pair.
Distribution under IP is performed using the NTP protocol for which the GPS Network Time
Server is a primary timeserver.

In case of GPS reception loss, the clock maintains the time and frequency distribution from
its internal pilot. Also, learning of the frequency pilot behaviour (effects resulting from
ageing and temperature variations, in the presence of the GPS reference), it is used to
improve the time and frequency distribution performance when the GPS is lost.

Most functions of the GPS Network Time Server are software controlled. At start-up, the unit
runs self-tests of its hardware resources, it checks that its internal pilot is stabilized and
makes a first coarse adjustment of the distributed frequency. After half an hour of operation,
the frequency accuracy is of 1.10-9 and the time accuracy is less than 1 s relative to
UTC(GPS) time.

As a timeserver on IP protocol, the GPS Network Time Server includes a DHCP and a
BOOTP client. Those clients automatically set to the configuration of the GPS Network Time
Server as it is connected to server configured IP network. Through the remote control link,
the GPSNTSTP external software enables the configuration of an address mask for
broadcasting to specified subnets.

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GPS Network Time Server

SALES: 0118 965 5100

Standard functions

The GPS Network Time Server is designed to generate, maintain and deliver:

• A time reference synchronized with the UTC (GPS) time. The unit delivers a 1PPS

signal and a time stamp message for this signal;

• A frequency reference (four 10 MHz outputs);

• A time stamp signal with one second repetition (TOD output);

• A frequency and time reference via a 1KHz carrier modulated by the time and date

(IRIG output);

• A time service on an Ethernet network, under IP and NTP protocols.

The clock is supplied with an AC or DC voltage. These two voltage sources are both
connected to provide full redundancy.

The user can access the clock status data via the remote control interface. Sets of commands
are also available to the user to initialise or set up the clock.

The synthetic status of the system operation is reported locally on the three front panel
indicator lights.

In the event of a hardware failure, a relay contact output closes.

The GPS Network Time Server is fully automatically operated. The IP address and the subnet
masks can be modified through the remote contr ol access. The GPS Network Time Server
requires no maintenance operation over a 10-year period.

Dimensions and weight

The GPS Network Time Server can be mounted in a standard 19-inch rack.

Height:1 U (44 mm)
Width: 19'' (483 mm)
Depth: 13.5 “ (340 mm)
Weight: < 5 Kg

Front and rear panel drawings

(See overleaf)

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GPS Network Time Server

TECHNICAL: 0118 965 6000