TimeLord Manual

Operations Manual

Revision 2.0

Vortex Communications Ltd75 The Grove, Ealing LONDON W5 5LL, UK

Tel: +44-(0)20-8579 2743 Fax: +44-(0)20-8840 0018

E-Mail: [email protected]

TimeLord-NetMaster Clock

Issue 2.0

TimeLord Master ClocksOperating and Installation Instructions

1999-2006 All rights reserved.

In the interests of improving design, operational function, and/or reliability, we reserves the right to make changes to the products described in this document without notice.

Trademarks

Mobaline is a registered trademark of Moser Baer AG

Microsoft, Windows and Windows NT are registered

trademarks of Microsoft Corporation.

All other trademarks and registered trademarks are propertyof their respective owners and are recognised.

Customer Support

For assistance with installation, configuration or operation ofyour TimeLord system, please contact us or your vendorsrepresentative.

For further technical information and support for your TimeLordor any other Vortex product, please visit the Vortex CommunicationsWeb site:

http://www.vtx.co.uk

Statutory Notices

Warning - To prevent fire or shock hazard, do notexpose the unit to rain or moisture.

Some TimeLord-Lite and TimeLord-MTG Versions Only

This equipment has a built-in rechargeable Nickel MetalHydride (NiMh) battery, which should only be replaced byqualified personnel.

Nickel Metal Hydride battery, dispose of properly.

You can return your unwanted Nickel Metal Hydride batteriesto the manufacturer or their agent.

Note: In some areas disposal of Nickel Metal Hydride batteriesin household or business trash may be prohibited.

Caution: Do not handle damaged or leaking Nickel MetalHydride batteries.

All other TimeLord versions

This equipment has a built-in Lithium battery which in normaloperation should have a service life greater than 10 years. TheLithium battery should only be changed by a suitably qualifiedengineer.

CAUTION

Danger of explosion if battery is incorrectly replaced.

Replace only with the same or equivalent typerecommended by the manufacturer. Dispose of used

batteries according to the manufacturers instructions.

You can return your unwanted Lithium batteries to themanufacturer or their agent.

Note: In some areas disposal of Lithium batteries in householdor business trash may be prohibited.

Caution: Do not handle damaged or leaking Lithium batteries.

For Customers in Europe

Electromagnetic Compatibility & Safety

The TimeLord Master Clock, when used in accordance withour recommendations, complies with the European CommunityElectromagnetic Compatibility Directive 89/336/EEC and LowVoltage Directive 73/23/EEC and conforms to the followingstandards:

EN 50081-1 55022 class B EN 50082-1 IEC 801-2 level 3

IEC 801-3 level 3IEC 801-4 level 3

EN 60950

For Customers in the USA

The equipment has been tested and certified to comply withthe limits for a Class B digital device, pursuant to Part 15 of theFCC Rules. These limits are designed to provide reasonableprotection against harmful interference in a residentialinstallation. The equipment generates, uses and can radiateradio frequency energy and, if not installed and used inaccordance with the instructions, may cause harmfulinterference to radio communications. However, there is noguarantee that interference will not occur in a particularinstallation. If this equipment does cause harmful interferenceto radio or television reception, which can be determined byturning the equipment off and on, the user is encouraged to tryand correct the interference by one or more of the followingmeasures:

Reorientate or relocate the receiving antenna. Increase the separation between the equipment and

receiver.

Connect the equipment into an outlet on a circuitdifferent from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technicianfor help.

You are cautioned that any changes or modifications notexpressly approved in this manual could void your authority tooperate this equipment.

Warranty

The TimeLord Master Clock is fully guaranteed, on a return toworks basis, against failure due to faulty parts or workmanshipfor one year from date of purchase. In the event of failure,either within or outside the warranty period, please pack theunit with care and return to the manufacturer, or their agent,for examination and repair.

In no event shall the manufacturer, or their agent, be liable forany direct, incidental or consequential damages of any nature, orlosses or expenses resulting from any defective product or theuse of any product, irrespective of whether the manufacturer, ortheir agent, has advance notice of the possibility of suchdamages.

Manual revision

This manual version 2.0 applies to VA software version 05.01and later, unless otherwise specified.


Issue 2.0

Contents

1 Introduction

Features 1-1

Package Contents 1-1

2 Quick Start and TimeLord Programming

Quick Start 1-4 2-1

Quick Start 5-8 2-2

Frequently Asked Questions 2-3

TimeLord Programming 2-4

Programming menus 2-4

Setting the time and date 2-6

Leap second insertion 2-7

Status display 2-7

System set-up 2-8

3 Installation

4 Location Setup

City / Location Table 4-2

5 Synchronisation Setup

GPS Synchronisation 5-1

MSF and DCF Synchronisation 5-3

6 Time Zone Setup

7 Serial Setup

Serial Messages Table 7-2

8 Relay Setup

Relay Modes Table 8-1

9 Network Setup

Operation & Quick Setup 9-1

TCP/IP Concepts 9-1

Supported Protocols 9-3

10 IRIG Setup

IRIG Format Table 10-1

11 EBU Setup

EBU Format Table 11-1

12 Impulse Setup

Operation and Quick setup 12-1

A Cable specifications

B Case dimensions

C Supported devices

D NTP Synchronisation Option

Issue 2.0


1-1

Package Contents

The product package should contain the following items:

1 TimeLord Master Clock.

2 IEC Mains lead (Rackmount TimeLords) or AC power adapter(-T Desktop). (Either UK, EU, US or AU style depending onorder code)

3 9-pin RS-232 serial cable.

4 This manual.

5 TimeLord software CD-ROM (available on request).

6 RJ45 patch lead ( TimeLord-Net versions only)

For systems supplied with GPS receiver V-488C.00:

6 GPS antenna / receiver module.

7 25 metres of 4 core cable

or systems suppled with MSF or DCF radio receiver.

6 V-484.02 / V-484.06 MSF or V-484.03 / V-484.07 DCFradio receiver with 5 metres of cable.

1 - IntroductionTimeLord series Master Clocks provides an ideal timesynchronisation solution for complete systems of equipment,including computer networks, CCTV security, voice recording,industrial process control and CCC applications. Available asstandard with MSF, DCF and GPS input synchronisation options,optionally the TimeLord can be supplied to synchronise from anNTP time source or from IRIG-B time code. This flexibilityallows the TimeLord to be used as a universal solution forproviding time synchronisation to many different devices.

Features

Operational

High visibility 6 digit display.

Display and timecode output messages can bereferenced to UTC or Local time.Set Once local time zone setup, automaticallycalculating future time zone changes for local timezone.256 Year Calendar, 4 digit year setting. (Range 2000-2255)Easy to install, setup and forget operation.

Timing accuracy

Integrated TCXO module standard on TimeLord versions.

Unsynchronised: 0.1sec/day @ 0-45C (20-25 C onTimeLord-Lite)Locked to MSF or DCF: within 30mS of UTCLocked to GPS: within 50uS of UTC (100uS on TimeLord-Lite)

Network Timing Accuracy (TimeLord-Net)

Clients typically synchronised within 1-10 millisecondsof TimeLord-Net timebase depending on network delay andjitter. (NTP)

RS232 and RS485/422 interface

One, two (.S2 versions only) or four (.S4 versionsonly) RS232 and RS485 serial outputs.71 preset data formats for specific CCTV andembedded equipment. Output interval programmablefor every second, every minute, 5 minutes, every hour,every day or on request.User selection of 1200, 2400, 4800, 9600 or 19200baud, 7 or 8 data bits and odd, even or no parity onnonspecific message formats

Relay

30v dc. @ 500mA rated change-over contacts0.1 second programmable contact change-over tooccur; every 5 seconds; every minute; every hour; onceper day at a user programmable time; on powerfailure; whilst locked to an external time reference andduring an error state.

w482 digital time/date code interface

Supports up to 50x V-400A series digital clocks and time zone displays.Set Once time zone setup, automatically calculatingfuture seasonal time changes for 15 time zones.

The TimeLord-Net Master Clock is supplied fitted with a 10Base-TEthernet interface to allow it to act as a time server on a TCP/IPnetwork. The TimeLord-Net interface supports the followingprotocols:

NTP and SNTP

Network Time Protocol (NTP) v2, v3 and v4 clients aresupported. (RFC1305 & RFC1119)

Simple Network Time Protocol (SNTP) v3 and v4 clientsare supported. (RFC2030 & RFC1769)

TIME Protocol

TIME protocol (RFC868) is supported in UDP mode.

Additional optional output - IRIG timecode interface (IRIG-OUT)

IRIG interface

1KHz amplitude modulated 3v p-p, 600 transformercoupled output.RS485 level output. (RS485 interface can either be usedfor serial or IRIG data)

Output formats: IRIG-B (B123), Afnor NFS 87-500,NENA 911, IEEE 1344, MIC20

Additional optional output - EBU Timecode Interface (EBU-OUT)

EBU interface

EBU longitudinal timecode (LTC) output, 2000 bps with25 complete messages every second.

Balanced 600 ohm and low impedance (TimeLord-Net)Balanced 600 ohm only (TimeLord-Lite).

Additional optitional dual intelligent impulse outputs (-02)

Impulse outputs - for analogue clocks (with hands)

Dual 24V alternate polarity impulse outputs rated at200mA per channel.

Each output programmable for one second, half minuteor one minute alternate polarity impulses.

Fully protected output drive circuitry detects powerfailure and short circuit line conditions which areautomatically corrected for on fault removal.

Environment

Power supply: Rackmount TimeLords - 110-240V AC 50/60HzDesktop version- 12v DC via supplied external 110v

or 230v AC PSU (specifiy required PSU at time of order)

Power consumption: < 0.4A @ 230V AC

Battery Backup: TimeLord-Net>1 Year.TimeLord-Lite and -MTG > 50 hours

(The battery backup maintains the internal time count duringperiods of mains failure - figures for fully-charged battery)

Enclosure: Rackmount TimeLords - 1u high 19 rack mount483mm wide x 185mm deep x 44mm high (19 x 7.3 x 1.75)Weight: 2.8Kg

-T Dekstop - Table top case173mm wide x 178mm deep x 49mm high (6.8 x 7 x 2)Weight: 0.5Kg

Operating temperature: 0-50C

Relative Humidity: 0% to 90% (non-condensing.)

Altitude: 0 to 3,000m

MTBF: > 50,000 hours


Issue 2.0

2 -

Con

nect

ing

V-4

88B,

V-4

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and

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Issue 2.0


2-2

5 -

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EBU

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.


Issue 2.0 2-3

Frequently Asked Questions

Will the V-488C / V-488B GPS receiver system workindoors?

Both the V-488C and the V-488B GPS receiver systems aredesigned for external mounting. We would recommendpositioning the post-mounting V-488C GPS system on the roofof the building with a clear view of at least 75% of the sky.

The post mounting antenna supplied with the V-488B GPSsystem should be mounted in a similar position. The decoderbox supplied with the V-488B GPS system should be mountedwithin 5 metres of this (either indoors or outdoors).

Please refer to chapter 5 for further information.

Can I extend the cable supplied with the V-488C GPSreceiver system?

The system is supplied with 25 metres of four-core screenedcable for connection between the V-488C GPS system and theTimeLord master clock. This cable length may be increasedup to a maximum of 50 metres using a similar type of cable orup to a maximum of 200 metres using a heavier gauge cable.

Please refer to chapter 5 and appendix A for furtherinformation.

Can I extend the cables supplied with the V-488B GPSreceiver system?

The V-488B GPS receiver system is supplied with a 5 metre fixedlength of cable for connection between the post-mountantenna and the decoder box. This cable length cannot beadjusted.

The system is also supplied with 25 metres of four-corescreened cable for connection between the decoder box andthe TimeLord master clock. This cable length may beincreased up to a maximum of 50 metres using a similar typeof cable or up to a maximum of 200 metres using a heaviergauge cable.

Please refer to chapter 5 and appendix A for furtherinformation.

Why will the TimeLord master clock not synchroniseto the MSF or DCF radio time code signal?

Under normal circumstances the MSF signal provides reliableoperation at distances of up to 1000km from Rugby in theUnited Kingdom. The DCF signal is normally usable up to1500km from Frankfurt in Germany.

In good conditions the TimeLord master clock, when usedwith a V-484 series radio time code receiver should synchroniseto MSF or DCF within 3 minutes. During this period, the codeLED should flash once per second.

However, MSF and DCF suffer greatly from electromagneticinterference which can cause the TimeLord master clock notto synchronise. In this instance, the code LED on the frontpanel of the TimeLord may flash erratically. To minimiseinterference problems, we would recommend mounting theV-484 series radio time code receiver away from any computer orelectronic equipment, fluorescent lighting, lift equipment,metal girders, reinforced concrete walls or any other sources ofelectrical noise.

MSF is off-air for a maintenance period of two weeks duringthe summer, and the first Tuesday of every January, April, Julyand October. Please refer to page 5-3 for further information.

Will the V-484 series radio time code receiver workindoors?

The V-484.02 MSF and 484.03 DCF radio time code receivers aresuitable for either indoor or protected outdoor mounting. Forreliable operation, we would recommend mounting these unitsexternally if possible though they normally work indoors also.

The V-484.06 MSF and V-484.07 DCF radio time code receivers aresuitable for indoor use only.

Please refer to page 5-3 for further information.

Can I extend the cable to my V-484 series radio timecode receiver?

The cable connection to a V-484 series radio time code receivermay be extended up to a maximum of 10m using a similarspecification cable. This connection may be extended up to amaximum of 200 metres using a screened twisted pair cableas specified in appendix A.

How can I tell if the TimeLord master clock hassynchronised to my chosen synchronisation timesource?

When the TimeLord master clock is synchronised, the LockLED will illuminate.

Why does the master clock not show the correct time,even though the lock LED is illuminated?

Check that the location is set correctly. Please refer to chapter4 for further details.

How do I synchronise / time-stamp a CCTV device fromthe TimeLord master clock?

Appendix C lists the supported devices and any relevantapplication note. The application notes detail how to connectthe TimeLord master clock to your chosen device and may befound on the CD-ROM supplied.

How do I connect analogue impulse clocks to theTimeLord master clock equipped with the -02 O/P option?

Please refer to chapter 12 for details on impulse output setup.

Issue 2.0


2-4

TimeLord ProgammingThe TimeLord Master Clock has a user friendly interfacebased on the use of four buttons.

The buttons are located to the right hand side of the displayand are labelled and .

The and buttons are used to step between and save

mode settings whereas the and buttons are used toalter the values of settings.

On pressing the button the function mode is entered. By

pressing the and buttons the user can scroll through allthe available modes for set up of the TimeLord .

The modes will be displayed in the following order:

Time Setting Mode

Location Setting Mode

Synchronisation Setting Mode

Network Setting Mode (visible on all TimeLords -

usable on TimeLord-Net versions only)

Zone Setting Mode

S1 Serial Output Setting Mode

S2 Serial Output Setting mode (.S2 & .S4 versions

only)

S3 Serial Output Setting mode (.S4 versions only)

S4 Serial Output Setting mode (.S4 versions only)

Relay Setting Mode

IRIG Setting Mode (visible on all versions - usable on

-IRIG-OUT versions only)

EBU Setting Mode (EBU-OUT versions only)

Impulse Channel 1 Setting mode (-02 versions only)

Impulse Channel 2 Setting mode (-02 versions only)

System Setting Mode

To select any of the modes whilst they are displayed in thefunction mode press the button. This allows the user toenter a specific mode and make any necessary changes to therelated settings.

To progress through the options use the button and to alter

the values for these options use the and buttons. On

completion of any changes the and buttons can beused to save the settings and to either step forward orbackward through any other options before returning to thenormal time display.

Continued on page 2-5

Programming menus

Normal time display

Function Time Setting Mode.^ to select, + or - to change.

Function Location Setting Mode.^ to select, + or - to change.

Function Synchronisation Mode.^ to select, + or - to change.

Function Network Setting Mode.^ to select, + or - to change.

Time Setting Mode selected, withseconds flashing. See page 2-6.

Location Setting Mode selected,with zone flashing. See page 4-1.

Synchronisation Mode selected.See page 5-1.

Network Setting Mode selected, withIP address flashing. See page 9-1.

Network SettingMode will appearon all expandableversions, but onlybe usable on netversions.


Issue 2.0 2-5

Function Serial 1 Setting Mode.^ to select, + or - to change.

Function Relay Setting Mode. ^to select, + or - to change.

Function IRIG Setting Mode. ^ toselect, + or - to change.

Function System Setup. ^ tochang the system seeting.

Normal time display

Function Zone Setting Mode. ^to select, + or - to change.

Zone Setting Mode selected, withlocation 2 flashing. See page 6-1.

Serial 1 Setting Mode selected,with code flashing. See page 7-1.

Relay Setting Mode selected, withsetting flashing. See page 8-1.

IRIG Setting Mode selected, withtype flashing. See page 10-1.

Brightness Mode selected, withbrightness flashing. See page 2-8.

Programming menus cont.

Function Serial 4 Setting Mode.^ to select, + or - to change.

Serial 4 Setting Mode selected,with code flashing. See page 7-1.

Function EBU Setting Mode. ^ toselect, + or - to change.

EBU Setting Mode selected, withtype flashing. See page 11-1.

Function Impulse channel 1 SettingMode. ^ to select, + or - to change.

Impulse channel 1 Setting Mode selected,with status flashing. See page 12-1.

Function Impulse channel 2 SettingMode. ^ to select, + or - to change.

Impulse channel 2 Setting Mode selected,with status flashing. See page 12-1.

Serial 2 SettingMode will onlyappear on .S2& .S4 versions.Serial 3 SettingMode & Serial 4Setting Mode willonly appear on.S4 versions.

Impulse Channel1 Setting Mode &Impulse Channel2 Setting Modewill only appearon -02 impulseversions.

EBU SettingMode will onlyappear on EBU-OUTversions.

IRIG SettingMode will appearon all versions, butonly be usable on-IRIG-OUTversions.

Issue 2.0


2-6

Setting the TimeA detailed diagram with full instructions on manually settingthe time and date is shown below.

Normal time display

Time setting mode selected, withseconds flashing.

Time setting mode selected, withminutes flashing.

Time setting mode selected, withhours flashing.

Time setting mode selected, withyear flashing.

Time setting mode selected, withmonth flashing.

Time setting mode selected, withday flashing.

Time setting mode selected, withleap second flashing.

Normal time display

Function Time Setting Mode.Press ^ to select.

+ increments the seconds count, - holdsthe seconds count at the current value.

+ and - change the minutesvalue.

+ and - change the hours value.

+ and - change the years value.

+ and - changes the monthvalue.

+ and - changes the day value.

+ and - changes the leapsecond value. Please refer topage 2-7 for further information.


Issue 2.0 2-7

Leap Second InsertionThe TimeLord can be programmed to allow for leap secondinsertion (one second is sometimes added at the end of March,June, September or December), to compensate for thedeceleration of the Earths rotational time with respect to thethe Atomic clock (UTC).

This function is enabled by programming the LS setting to yes(as shown on page 2-6).

Date, Sychronisation, Impulse Time andtemperature Status DisplaysWhen in normal time display mode the plus and minus buttonscan be used to cycle through the date, synchronisation, impulsetime (-02 versions) and temperature (expandable versions) statusdisplays. When any of these displays is selected the TimeLordwill return to normal time display mode after 2 minutes.

The Synchronisation status display provides useful informationregarding the current quality of the MSF or DCF signals thatare being received by a V-484 series radio receiver.

The two Impulse time displays indicate the Impulse time ofboth Impulse channels. Please refer to chapter 12 for furtherinformation.

The Temperature status display shows the internaltemperature of the TimeLord Master Clock (not TimeLord-Lite).

Synchronisation Status Display

The synchronisation status display provides the followinginformation relating to MSF or DCF signal reception.

Impulse timescreens will onlyappear on -02impulse versions.

Temperaturestatus screen willonly appear onexpandable versions.

Normal time display

Synchronisation status display.

Date display.

Normal time display

Indicates the number of seconds of thecurrent time message that have beenreceived. Aq indicates that the TimeLordis trying to acquire the first secondof a new time message.

Indicates the number of valid timemessages received. Incremented forevery good message decremented forevery corrupt message. (Range 0-F)

The number of minutes before the TimeLorddeclares that it has lost lock tothe input signal. (Range 0-F)

The synchronisation lockout counter, thenumber of minutes of valid, butdifferent time messages requiredbefore the TimeLord will synchroniseto the new time. (Range 0 - 9)

Temperature status display.

Impulse channel 1 time display.

Impulse channel 2 time display.

Issue 2.0


2-8

System Set-upThe system set-up menu contains general set-up options forthe TimeLord Master Clock. The table below details theavailable options.

w482 Timecode output

As shown in the table above, the w482 timecode output portmay be set to output either w482 timecode or unmodulatedMSF, DCF or HBG timecodes. The MSF, DCF & HBG outputs maybe set to pulse high or low as required (MSF, DCF & HBG pulsehigh, -MSF, -DCF & -HBG pulse low). The L48 optionimplements longer w482 code pulse lengths for use with older400 series digital clocks. The S48 option implements shorterthan standard w482 code pulse lengths.

Normal time display

Function System Setting Mode.Press ^ to select.

Function Time Setting Mode.Press + eight times to move tosystem setting mode.

Normal time display

Brightness setting mode, withbrightness flashing. Use + and -to alter brightness and ^ to store.

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w482 timecode output setting mode,with w482 flashing. Use + and - toalter output type and ^ to store.

TimeLord software version. Press^ to continue.

Network software version(disabled in this softwarerevision). Press ^ to continue.

Factory use only. Press ^ tocontinue.

If your TimeLordis fittedwith NTP,EBU, S2, S4or .IMPoptions, youmay need topress the +switch morethan 8 times.


Issue 2.0

Warning - dangerous voltages - the TimeLordmaster clock must be disconnected from the mains

supply prior to removing the top cover.

Power Supply Connection

The TimeLord family of master clocks are fitted with universalpower supplies suitable for 110v - 240v ac operation. Thedesktop version may be supplied for 230v AC, 110vAC or 12v DCoperation. Please specify appropriate end user location attime of order to enable correct power adapter or connectortype to be supplied.

PSU order codes:

.AU - Australian style, 240v 50Hz ac.

.EU - European style, 230v 50Hz ac.

.UK - UK style, 230v 50Hz ac.

.US - US style, 110v 60Hz ac.

The TimeLord rackmount master clock is supplied with an IECstyle mains lead.

The TimeLord-Lite/T is supplied with an external 12v DC PSU.If an alternative PSU is to be used, it should have a rating ofgreater than 0.4A at 12v DC.

The master clock must be connected to the appropriate supplyafter first verifying the correct voltage by reference to thesupply voltage label fixed to the rear of the clock (rackmountversions) or on the external power supply (desktop).

A connection to the earth line must be made to ensure safeoperation and ensure compliance with EMC regulations.

To ensure conformance with EN60950:

(A) For installations where the TimeLord master clockis to be permanently connected into the mainspower circuit, a readily accessible disconnect deviceshould be incorporated in the fixed wiring.

(B) For installations where the TimeLord master clockis to be plugged into the mains power circuit, asocketed outlet should be installed near theequipment and should be easily accessible.

All installation work should be performed in accordancewith the Sixteenth Edition of the IEE Wiring Regulations.

Battery backup.

Expandable TimeLords are fitted with a Lithium battery which willmaintain the internal time count for a period normally in excess of 1 year if the mains supply is interrupted.

The TimeLord-Lite is fitted with an automatically recharging batterywhich will, when fully charged, maintain the internal timecount for a period in excess of 50 hours if the mains supply isinterrupted.

Fuses and Output protection.

The TimeLord circuit board makes use of advanced automaticallyresettable fuse technology so that it is protected under faultconditions.

The universal power supply within the TimeLord uses a20mm fuse rated at 2 Amps 250V. Please note that this fuse isnot a user serviceable part.

External Connections

The external connections located on the rear of the TimeLordprovide the following inputs and outputs:

Connection Section

GPS / Synchronisation Connection 5

Relay Connection 8

IRIG* and EBU* Connection 10 & 11

RS232 and RS422/485 S1, S2*, S3* & S4* 7Connections

w482 Connection 6

10BaseT Ethernet* Connection 9

Impulse Connection* 12

* denotes optional items which may or may not be fitted in yourunit.

Please see the relevant sections of this manual for furtherinformation.

Operation

Please see section 2 for a quick start guide to getting yourTimeLord system up and running.

3-1

TimeLord-Lite/T Desktop version

3 - Installation

TimeLord-Lite - no expansion capability

TimeLord-Net and TimeLord-Net-Client

Issue 2.0


4 - Location SetupThe TimeLord Master Clock provides advanced time zonefunctionality. Regardless of time synchronisation source, theTimeLord can be used to provide time and date informationreferenced to UTC, user local time or other custom time zone.Incorporating Set Once technology, the TimeLord willautomatically calculate future seasonal time changes for all 64of the preset time location code settings.

Setting the location

For installations where the output of the TimeLord is to bereferenced to UTC / GMT, the location code should be set to 00.For installations where the output of the TimeLord is to bereferenced to the local time zone, select the appropriatelocation code from the table opposite. (eg. For a unit installedin Birmingham, England, where local time output is required,location code 01 should be used.)

User Programmable Time Zone

For time-offsets and daylight saving time change dates notcovered by the location codes on page 4-2, a userprogrammable time zone is provided. Information regardingthe time offset from UTC and any daylight saving change rulesmay be input via a 12 digit code.

Please contact our technical department for further informationregarding this function.

4-1

Normal time display

Function Time Setting Mode. Press +to move to Location Setting Mode.

Function Location Setting Mode. Press^ to select.

Location Setting Mode selected, withcurrent location flashing. Use + and- to select the required location fromthe table on page 4-2.

Press ^ to store the new locationsetting and return to normal timedisplay.

Normal time display.


Issue 2.0 4-2

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Issue 2.0


GPS Synchronisation

The V-488C and V-488B GPS receiver systems are designed to beautomatically synchronised to time signals transmitted fromthe Global Positioning System (GPS) navigation network. TheGPS constellation consists of 28 operational satellites,operating in 12 hour orbits at an altitude of 20,200km.

Both the V-488C and the V-488B GPS receiver have been designedfor simple installation and operation by the end-user, requiringonly a 4 wire interconnection to the TimeLord Master Clock.When synchronised to a V-488C or 488B GPS receiver system theTimeLord-Net Master Clock output signals are maintained within 50uS of UTC (100uS of UTC on TimeLord-Lite versions).

The reception gain pattern of both GPS systems is designedfor full, upper hemispherical coverage with the gaindiminishing at low elevations. This cross-section is consistentthrough 360 degrees and so the 3 dimensional gain pattern isa symmetrical spheroid surface.

Advantages of GPS time synchronisation:

Very accurate synchronisation

Can be used anywhere in the world

Not subject to EM interference

Disadvantages of GPS time synchronisation:

Antenna needs to be mounted externally with a clearview of 75% of the sky.

The V-488C GPS Synchronisation System

The V-488C GPS synchronisation system is housed in a singleIP66 rated case containing an advanced combined Sony activeantenna and 12 channel parallel GPS receiver module and amicroprocessor based communications interface. The systemis supplied complete with a post mounting clamp to enablethe unit to be fixed to a suitable horizontal or vertical post ofup to 2cm diameter. The antenna should be mounted on theroof of a building or under a suitable skylight.

The V-488B GPS Synchronisation System

The V-488B GPS receiver system comprises a post mountingactive antenna and a separate receiver/decoder unit. Theantenna module transmits the received GPS signals andreceives power (5Vdc @ 25mA) from the GPS receiver/decodermodule via a single 5 metre long RG58 coaxial cable. A postmounting clamp is supplied to enable the antenna to be fixed toa suitable horizontal or vertical post of up to 2cm diameter. Theantenna may be mounted on the roof of a building or under asuitable skylight.

The GPS receiver/decoder unit contains a Motorola 8 Channelparallel receiver and a microprocessor based communicationsinterface. The receiver/decoder module is housed in a robustaluminium case fitted with mounting points for wall mountingand protected to IP65. The module should be mounted in aprotected location within 5 metres of the antenna.

V-488C and V-488B System Installation

To ensure ease of operation and to remove the possibility ofoperator error, both the V-488C and V-488B GPS systems aredesigned to self initialise.

Ensure that the TimeLord is disconnected from themains power supply when making connections to the

V-488C / V-488B GPS receiver systems.

1 Install the V-488C unit or V-488B antenna modulehorizontally using the post mounting kit provided.Ensure that the unit has a clear view of at least 75% ofthe sky. If the sky view is reduced the interval betweenswitch-on and system time synchronisation will beconsiderably increased.

2 Connect the antenna module to the GPS receiver usingthe special 5m cable provided (V-488B systems only).

5-1

5 - Synchronisation Setup

GPS connection

10 way terminal block

- -ve Power for V-488B/C GPS+ +ve Power for V-488B/C GPSA Signal A from V-488B/C GPSB Signal B from V-488B/C GPS

EMC grounding pointNote:

A Screened cable should be used toconnect the V-488C / V-488B GPS receiverto the TimeLord . The screen shouldbe connected to the EMC groundingpoint on the TimeLord and on theV-488B GPS receiver.

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MSF and DCF connection


- Green or uncovered wire fromV-484 radio receiver.

+ Link to A connector.A Link to + connector.B Red or clear wire from V-484

radio receiver.EMC grounding point

Note:

A Screened cable should be used toconnect the V-484 radio receiver to theTimeLord in areas of high electricalnoise. The screen should beconnected to the EMC groundingpoint on TimeLord only.

uncovered clear

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Issue 2.0 5-2

LeadAntenna

plug-in terminal blocktwo part power/data

Internal antenna socket

ABCD

POWER

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B A + -

3 A connection between the V-488C / V-488B and the TimeLord should be made using the 25 metre four corecable supplied. If a longer cable distance is requiredAppendix A should be consulted for suitable cablespecifications. The maximum distance between theGPS system and the TimeLord master clock is 200m.If a screened cable is used, the cable screen should beconnected to the EMC ground connection on the 10 wayterminal block, located on the rear of the TimeLord.On 488B systems, the screen should be connected tothe screw fitting on the 488B receiver/decoder case.The screen is supplied pre-connected on V-488C unitswith captive cable connections.

4 The 4 GPS input connections located on the 10 wayterminal block on the rear of the TimeLord, should bewired as shown in the diagram on page 5.1.

5 Connect the power supply to the TimeLord MasterClock.

6 Once the power has been applied the receiver willautomatically begin to search the sky for all availablesatellites, during this process the green LED will flash.After three satellites have been acquired the green LEDwill stop flashing and become constantly illuminated,indicating that a precise date and time has beencalculated from the satellite data transmissions. From acold start this process will typically take less than 10minutes.

7 Ensure that the TimeLord is configured to synchronisefrom the GPS signal by following the procedure onpage 5-3.

Once the green LED has illuminated the synchronising timesignals are transmitted from the GPS system to the TimeLord.The TimeLord Master Clock should lock in and displaythe correct time within 5 minutes.

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5 metre cable(cannot be extended)

V-488B AntennaShould be mounted with aview of at least 75% of thesky.

20mm dia. post(not supplied)

Both the V-488C and the V-488B GPS Receiver systems aresupplied with 25 metres of 4 core cable. Cable distance canbe extended up to a maximum distance of 200 metres usingthe cable specifications detailed in appendix A.

20mm dia. post(not supplied)

V-488C GPS ReceiverShould be mounted with aview of at least 75% of thesky.

V-488C GPS Integral Receiver/Interface

V-488B GPS Separate Receiver/Interface

25metre captivecable for connectionto TimeLordMaster Clock.

Issue 2.0


5-3

MSF and DCF synchronisation

MSF and DCF are the two most widely used radio time codesignals. The DCF signal is derived from the atomic clocks at thePhysics Institute of Brunswick and transmitted at a frequencyof 77.5KHz from Manflingen, near Frankfurt in Germany. TheMSF signal is referenced to the Caesium Beam Oscillators atthe National Physical Laboratory and transmitted on afrequency of 60KHz from Rugby in the United Kingdom.

Under normal circumstances the DCF signal provides reliableoperation at distances of up to 1500km, MSF signals arenormally usable up to 1000km from the transmitter. Greateroperating ranges are possible at night.

When synchronised to MSF or DCF using a V-484 radio receiverthe TimeLord Master Clock output signals are maintainedwithin 30mS of UTC.

Advantages of MSF and DCF time synchronisation:

Lower purchase cost than GPS

Can sometimes be installed internally.

Disadvantages of MSF and DCF time synchronisation:

Can be difficult to find good location for signalreception.

Suffers greatly from EM interference - Avoid locatingnear computers, electronic equipment, fluorescentlighting, lift equipment, metal girders, reinforcedconcrete walls and all other sources of electrical noise.

MSF is off-air for a maintenance period of two weeksduring the summer, and the first Tuesday of everyJanuary, April, July and October. MSF status can bechecked by telephoning 020 8943 6493.

Installation

The V-484 series time code receiver should be mounted:

At least 2.5 metres from the TimeLord Master Clock.

At greatest practical distance from:Other electronic equipment including computers,fluorescent lights and signs, metal girders, reinforcedconcrete walls and any other sources of electrical noise.

On the side of the building nearest Rugby (MSF) orFrankfurt (DCF).

Preferably on the outside of the building (V-484.02 andV-484.03 only) as high as possible. The case isweatherproof to IP65 (484.02 and 484.03 only) but it ispreferable to provide some protection from direct rain.

With the cable entry on the lower face of the case.(V-484.02 and V-484.03 only)

The antenna is supplied with 5 metres of two core cable, if alonger cable distance is required Appendix A should be consultedfor suitable cable specifications. The maximum distancebetween the V-484 radio receiver and the TimeLord MasterClock is 200m.

If a screened cable is used, the cable screen should be connectedto the EMC grounding terminal on the 10 way terminal block,located on the rear of the TimeLord.

Alignment

The V-484.02 (MSF) and V-484.03 (DCF) radio receivers have dualferrite antennas, which normally permit location regardless oforientation to the transmitter. The receiver is mounted by meansof four fixing holes in the rear surface which are accessed afterremoving the front cover. The four mounting holes are locatedoutside of the central sealed compartment.

The V-484.06 (MSF) and V-484.07 (DCF) receivers have a singleantenna element and are supplied with an adjustablemounting bracket so that the installer can ensure that theorientation of the longest face of the receiver is at 90o to thedirection of the transmitter.

The front cover of the V-484.02 and V-484.03 receivers may beremoved to enable the indicator LED to be viewed. The indicatorLED on the V-484.06 and V-484.07 receiver is located on the frontface of the unit.

The alignment of the receiver is correct when the LED flashesonce per second. The Code LED located on the front of theTimeLord will flash at the same time as the LED in the V-484.

Signal reception

In good conditions the TimeLord master clock will take threeminutes to synchronise with the transmitted time code fromeither DCF or MSF. When the TimeLord is locked to thetransmitted signal, the locked LED, located after the secondsdisplay, is illuminated continuously. During periods of signalfailure or signal corruption the clock will maintain timekeepingusing its internal crystal oscillator.

1 PPS / Serial ASCII Synchronisation

Special order versions of the TimeLord Master Clock are availableto facilitate synchronisation with an RS232 / RS485 level serialASCII data string or timebase generation from an RS232 /RS485 level 1 Pulse Per Second source. The Serial variant willsynchronise to Serial format 1 (as shown on page 7.1)transmitted at 9600 baud, 8 data bits, no parity, 1 stop bit at a1 second repetition rate.

Normal time display

Function Time Setting Mode. Press +twice to move to synchronisation mode.

Function Synchronisation Mode. Press^ to select.

Synchronisation mode selected withcurrent mode flashing. Use + and -to select required setting.

Press ^ to save synchronisation modeand return to normal time display.



Issue 2.0

The w482 signal was developed for controlling electronicclocks, using a single cable pair data interconnection, inelectrically noisy environments. A principal advantage ofw482 is the ability to provide time information in any one offifteen different synchronised time zones. All fifteen timezones can be individually configured from the front panel ofthe TimeLord, using Set Once technology to allow automaticseasonal time change correction.

The w482 signal is transmitted at 4-24v amplitude and at a50 bits per second data rate. The signal is virtually immune toelectro-magnetic interference.

One TimeLord unit can control up to fifty 400A series slavedisplays located up to 1km from the master clock unit using asimple, non-critical cable pair.

Setup Procedure

1 Decide what time you want to display on your slaveclocks. If you just want to display Local Time, aspreviously programmed during location setting (section4), proceed to stage 2.

If you have more than one time zone to display or wantto display a different time zone from that set in thelocation setting, determine the zone location codes(Page 4-2) and program w482 zones 2 - A accordingly.

Ensure that the TimeLord system is disconnectedfrom the mains power supply when making

connections to the w482 output.

2 Connect the V-400A slave clocks to the TimeLord w482output terminals. (See above and page 6-2).

Check that the V-400A (or V-470A) slave clock is programmedfor w482 time code synchronisation. If the V-400A (orV-470A) slave clock is to be synchronised by a w482 timezone which is not zone 1, program the V-400A (or V-470A)clock accordingly.Refer to the V-400A (or V-470A) series operating andinstallation manual for more details.

3 Apply power to the TimeLord.

Note: If you using the IRIG output (IRIG-OUT versionsonly) or EBU output (EBU-OUT versions only) and areusing it in an application that requires the location setting tobe set to a time zone other than the local time zone, w482 zone2 should be programmed for the local time zone and the slavedisplays should be configured accordingly.

6 - w482 Time Zone Setup

TimeLord w482 Code Output


A w482 Code +B w482 Code -

EMC grounding pointNote:

Polarity of connection is not critical.

If a screened cable is used for systeminterconnection, the screen shouldonly be connected to the EMCgrounding point on the TimeLord.

6-1

Normal time display

Function Time Setting Mode. Press +four times to move to w482 zonesetting mode.

Function w482 Zone Setting Mode.Press ^ to select.

w482 Zone Setting Mode, zone 2selected with current location flashing.Use + and - to change.

Press ^ to store the new zone 2setting and move on to the w482 timezone 3 setting.

Zone 3 selected, press + and - tochange current setting, ^ to move tonext zone.

w482 zone settings 4 - F

Zone F selected, press + and - tochange current setting, ^ to return tonormal time display.


Issue 2.0


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Issue 2.0 7-1

Operation

The TimeLord Master Clock is fitted as standard with oneRS232 & RS485/RS422 serial data output. The signals areaccessed via the female DB9 connector labelled RS232/RS485S1 mounted on the rear of the unit.

Additional serial outputs (.S2 & .S4 versions only)

The TimeLord is optionally available with two or four RS232/RS485serial data outputs. Where installed, these signals areaccessed via the S2, S3 and S4 female DB9 connectors. If yourTimeLord is fitted with multiple serial ports, extra serial settingmodes (S2, S3 & S4) will appear in the main programmingmenu to allow these ports to be individually configured usingthe procedure detailed below. (Please note: The RS232 level 1pulse per second output is not present on pin1 of serial portsS3 & S4).

Setting the Message Format

The TimeLord has 71 different preprogrammed serial outputmessages. The desired message can be selected from thelists on page 7-2 and programmed into the TimeLord usingthe procedure on page 7-5. Please also refer to Appendix C fordetails of products compatible with the TimeLord.

Setting the Output Message Time Offset

The TimeLord serial output message may be referenced tothe current location setting (see section 4) or UTC/GMT asdetailed in the procedure on page 7-5 .

TimeLord RS232 & RS485/422Interface

DB9-F Connector

RS232

1 1PPS2 Transmitted Data (TXD)3 Received Data (RXD)5 Signal Ground (GND)RS485/422

8 A - non-inverting9 B - invertingNote:

The 1PPS signal is at RS232 levels andgoes high for 100ms on the secondedge.

Data Formats

The serial messages numbered from 01 to 09 are userprogrammable. This allows the user to program informationconcerning the baud rate, data bits, parity, stop bits and serialrepetition to ensure that the format chosen meets theirrequirements.

Some of the other serial data messages have factory presettransmission formats to ensure that system interconnection istrouble free.

Message Format

Serial Format 1 (Code 1)

STX Su St Mu Mt Hu Ht Du Dt Mtu Mtt Yu Yt St ETX

Serial Format 2 (Code 4)

T Yt Yu : Mtt Mtu : Dt Du : 0 W : Ht Hu : Mt Mu : St Su CR LF

Byte Description ASCII value

S seconds 30h-39hM minutes 30h-39hH hours 30h-39hW day-of-week 31h-37hD day-of-month 30h-39hMt month 30h-39hY year 30h-39hSTX start transmission 02hETX end transmission 03hCR carriage return 0dhLF line feed 0ah0 ASCII zero 30h: ASCII colon 3ahSt status - see table 30h-3fh

Status byte - ASCII value 30h-3fh

Bit 0 undefined.Bit 1 0 = Winter time, 1 = Summer TimeBit 2 0 = not synchronised, 1 = synchronisedBit 3 0 = no early warning bit, 1 = early warning bit

Application Notes

The TimeLord Information CD contains application notesdetailing the use of the TimeLord with many different typesof equipment. If you are unable to access the CD or requirefurther information on the setup and use of the serial outputplease contact our technical support representatives.

The Serial Messages table on page 7.2 contains references toapplication notes which contain additional information specificto that serial message.

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7 - RS232 & RS422/485 Serial Output

RS232/RS485 S1

Issue 2.07-2


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03 Std-serial Format 2 User Programmable User Programmable

04 Std-serial Format 2 with day of week User Programmable User Programmable

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3-7egapnodeunitnoC


Issue 2.0

segasseMlaireS .tnoc( )


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4-7egapnodeunitnoC

7-3

Issue 2.0


7-4

segasseMlaireS .tnoc( )


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Issue 2.0 7-5

Serial Setting Mode

Normal time display

Function Time Setting Mode.^ to select, + or - to change.

Function Serial Mode. Press ^to select.

Serial Mode with serial typeflashing. Use + and - to select.

Baud rate selected, with currentsetting flashing.

Data bits selected, with currentsetting flashing.

Parity selected, with currentsetting flashing.

Stop bits selected, with currentsetting flashing.

Serial repeat selected, withcurrent setting flashing.

Normal time display

+ and - change the selectedserial output message.

+ and - changes the data bits. PRESETindicates the setting cannot be changed.

+ and - changes the parity. PRESETindicates the setting cannot be changed.

+ and - changes the stop bits. PRESETindicates the setting cannot be changed.

+ and - changes the repeat rate. PRESETindicates the setting cannot be changed.

+ and - change the baud rate. PRESETindicates the setting cannot be changed.

Message time offset with messgagereferenced to current location setting.

+ and - changes the message to outputtime referenced to UTC.

Issue 2.0


8-1

Operation

The relay can be programmed to operate every 5 seconds,every minute, every hour, once per day at a user programmabletime or to signal a fault condition.

The relay contacts are rated for 500mA @ 30v DC operation.The minimum contact load is 1mA @ 5v DC. The contactclosure duration is 100mS.

Setting the Programmable Relay Time

When the TimeLord is used to provide one contact closureper day it is recommended that the time chosen is at 03:00.This allows the synchronised equipment to be adjusted for theseasonal time change on the day that it occurs. Mostconventional systems use a contact closure at 00:00 which willnot update the synchronised equipment for the seasonal timechange until the next day.

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8 - Relay Setup

TimeLord Relay Connections


no N.O. Contactnc N.C. ContactC CommonNote:

The relay is configured so thatcontacts no-C are normally open andcontacts nc-C are normally closed.

For example, if the relay is set toclose every hour for 100ms, contactsno-C will close for 100ms on the hour,while contacts nc-C will open for100mS.

Normal time display

Function Time Setting Mode. Press +six times to move to relay setting mode.

Function Relay Setting Mode.Press ^ to select.

Current mode flashing. Press + and - tochange relay mode. Press ^to exit, seebelow if selected mode is PRO.

Selected relay mode is Program.Press ^ to set activation time.

Use + and - to program relayoperation minutes time. Press ^to set operation time hours.

Use + and - to program relayoperation hours time. Press ^to exit.


If your TimeLordis fittedwith NTP,EBU, S2, S4or .IMPoptions, youmay need topress the +switch morethan 6 times.


Issue 2.0 9-1

9 - Network Configuration (TimeLord-Netversions only)

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Operation

The TimeLord-Net operates as a Network Time Server on a TCP/IPComputer network. The quick setup procedure should befollowed to get the TimeLord-Net up and running quickly. Page 9-3details the various protocols that the TimeLord-Net supports whilepages 9-1 and 9-2 detail the basics behind IP addresses,subnets and gateways.

Pages 9-4 and 9-5 show the setting procedure in more detail.

The TimeLord-Net master clock has a 10Base-T Ethernet interfaceand must be connected either to a dedicated 10Base-T port ora switchable 10Base-T / 100Base-T port on your network.

Quick Setup

Install the TimeLord-Net as detailed in section 3 of this manual.

Attention: If you are unsure of the following networksettings please contact your network administrator.

Incorrect settings can adversely affect theperformance of your network.

1) Program the IP address of the TimeLord-Net in dotted-decimal notation. (e.g. 192.168.0.41) Use the plus andminus buttons to increment and decrement each value.The up arrow will move on to the next value, the downarrow will return to the previous value.

2) Program the Subnet Mask of the TimeLord-Net in dotted-decimal notation. (e.g. 255.255.255.0) Use the plusand minus buttons to increment and decrement eachvalue. The up arrow will move on to the next value, thedown arrow will return to the previous value.

3) Program the default Gateway of TimeLord-Net in dotted-decimal notation. (e.g. 192.168.0.1). Use the plus andminus buttons to increment and decrement each value.The up arrow will move on to the next value, the downarrow will return to the previous value.

4) Use the CAT5 patch cable (supplied) to connect theTimeLord-Net to your TCP/IP Computer network. Ensurethat the network connection used is compatible with10Base-T. Check the green link led illuminates,confirming that correct connection has been made tothe network.

TCP/IP Concepts

IP Address

TCP/IP is todays most prevalent networking technology. It canbe used for small Local Area Networks (LAN) of two or threeusers, right through to the other end of the spectrum where itis used as the protocol connecting every machine on theInternet.

Each connected computer must have a unique address toensure that data transmitted from one location reaches thecorrect destination.

Blocks of addresses are assigned to organizations by theInternet Assigned Numbers Authority (IANA). Users and smallorganisations usually obtain their addresses from their InternetService Provider while larger organisations liaise directly withthe IANA.

The Internet Protocol (IP) uses 32 bit addresses, which whendisplayed to humans are usually written in dotted-decimalnotation. Dotted-decimal notation is where the address iswritten as four decimal numbers, one for each byte of theaddress.

For example the dotted-decimal IP address 195.112.5.193 canbe represented in the following formats:

Decimal representation: 3278898625

Hexadecimal representation: 0xC37005C1

Binary representation: 11000011 0111000000000101 11000001

The IP address of a computer is constructed of two parts. Thefirst part of the address identifies the network to which thecomputer or host is connected, the second part specifies theactual host itself. The TCP/IP software on each host canautomatically determine the class of an IP address byexamining the first byte of that address.

Net UpdateLink

Data

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MAC Address

10Base-T

TimeLord-Net Network Interface

RJ45 10Base-T Ethernet Connector

DB9 Network software update port

Link Link LED indicating connection to network

Data Data LED indicating data on the network

Issue 2.0


9-2

There are five different classes of address:

Class A - 1.x.x.x - 126.x.x.x

These addresses have a 8 bit network number and a 24 bithost number addresses. Each class A network can have16,777,214 hosts.

Class B - 128.1.x.x - 191.254.x.x

These addresses have a 16 bit network number and a 16 bithost addresses. This means that each class B network can have65,354 hosts.

Class C - 192.0.1.x - 223.255.254.x

These addresses have a 24 bit network number and an 8 bithost addresses. This means that each class C network canhave 254 hosts.

Class D - 224.0.0.0 - 239.255.255.255

Class D network addresses are used for multicasting, which iswhere information sent from one address can be sent to manydifferent hosts simultaneously.

Class E - 240.0.0.0 - 254.255.255.255

Class E network addresses are used for experimentalpurposes.

For each unique network number, the base address of therange (i.e. host number zero) is known as the network addressand is not assigned to a host. The top address of the range is(i.e. host number set to all ones) the broadcast address whichis used as the address for sending to all hosts on the samenetwork number simultaneously.

Subnet Addressing

Subnet addressing allows us to split one IP network addressinto several smaller physical networks known as subnets. Thisis especially useful with Class A and Class B addresses wherethere are very large numbers of network hosts with the samenetwork address.

A subnet is created by splitting the host address part of the IPaddress into two, the first being subnet address and thesecond host ID.

In the class B example shown above the address has beensubnetted into 254 subnets, each with a possible 254 hosts.

Subnet Mask

The subnet mask is a 32 bit number which specifies how manybits of the IP address are for the network / subnet address andhow many are for the host address.

For the class B subnet example used above the subnet maskwould be as follows:

The following table details a few typical subnet masks and thenetwork classes / subnets they describe.

Private IP addresses

With the massive growth of the Internet there was a realdanger that the IANA would run out of IP addresses. To avoidthis situation three blocks of IP addresses have been reservedfor use in private networks. It is recommended that on anorganisations TCP/IP networks use these private networknumbers for their networks and make use of a technology likeNAT (Network Address Translation) to allow their users accessto the Internet.

10.0.0.0 - 10.255.255.255

172.16.0.0 - 172.31.255.255

192.168.0.0 - 192.168.255.255

ARP & MAC

When one device (A) wants to send data to another device (B)on the same Ethernet LAN it must convert the IP address of thedestination device to the Ethernet Media Access Control (MAC)address of that device. Each Ethernet device has a globallyunique 48 bit MAC address which is assigned at time ofmanufacture.

If device A does not have Bs MAC address an AddressResolution Protocol (ARP) request is broadcast onto the localNetwork. The ARP request contains the IP address of device B,so device B is the only device to respond. Device B sends itsMAC address to device A and it is stored in device As ARPtable.Device A can now send data directly to device B.

Gateway Address

The gateway address is used when a device on a networksends data to another device that is connected to a differentnetwork segment. The gateway device is typically a routerconnecting two different networks together.

When one device sends data to another device the TCP/IPsoftware checks to see if the destination network address isthe same as its own network address. If the network addressis the same the data is transmitted normally, using ARP toresolve the destination MAC address if required.

If the network address is different the data is forwarded to theIP address specified in the Gateway setting for routingonwards to the specified network. This routing process mayoccur several times as the data travels across differentnetworks enroute to its destination.

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Issue 2.0 9-3

Supported Protocols

Time Protocol (RFC868)

RFC868 defines the original TIME protocol, which provides site-independent, machine-readable date and time in response toa request from a client PC.

When a request is received the TimeLord-Net responds with a 32-bittime value corresponding to the number of seconds sincemidnight of January 1st 1900. This representation of time willserve until the year 2036.

Time Protocol is supported in the UDP mode of operation.(RFC868)

NTP (RFC1305 & RFC1119)

The Network Time Protocol (NTP) is the most widely usedcomputer time synchronisation protocol in use today. Itprovides a mechanism to both organise a synchronisationsubnet and distribute precise time synchronisation informationto the local clocks of all participating computers. In most partsof the Internet today it is possible to use NTP to provideaccuracys of tens of milliseconds, depending on thecharacteristics of the synchronisation source, stratum ofoperation, the local network paths and the client softwareused.

The NTP standard has been designed so that it can providereliable operation with clients and servers of vastly differentspecifications and across network paths with diverse delay andjitter characteristics. Most users of Internet NTPsynchronisation make use of the standard NTP distributionavailable from http://www.ntp.org. This software packageincludes the full suite of NTP options and algorithms and hasbeen ported to a wide variety of hardware platforms rangingfrom Personal Computers (PCs) to supercomputers.

We would recommend that, in large hierarchical timedistribution projects, the standard NTP distribution be used onthe Stratum 2 and 3 servers for maximum redundancy andclient availability.

Network Time Protocol (NTP) v2, v3 and v4 clients aresupported in both unicast and broadcast modes of operation.(RFC1305 & RFC1119)

SNTP (RFC2030 & RFC1769)

Simple Network Time Protocol (SNTP) v3 and v4 clients aresupported in both unicast and broadcast modes of operation.(RFC2030 & RFC1769)

Simple Network Time Protocol (SNTP) is an adaptation of NTP,which can be used for applications where the ultimateperformance and associated overhead of the full NTPimplementation is not required.

Most PC client software is based on the SNTP specification andcertainly for most intranet applications will provide a higherdegree of accuracy than is required.

Simple Network Time Protocol (SNTP) v3 and v4 clients aresupported in both unicast and broadcast modes of operation.(RFC2030 & RFC1769)

Synchronisation Alarm Status

The NTP/SNTP version 4 message format has provision for atwo-bit Leap Indicator code that gives indication of animpending leap second and synchronisation alarm status.When nLoc is set (y), the TimeLord-Net Master Clock will return anLI (Leap Indicator) value of 0 if the clock is synchronised and3 if the clock is unsynchronised. When nLoc is not set (n), theTimeLord-Net Master Clock will return an LI (Leap Indicator) value of0 regardless of synchronisation status.

If the synchronisation source is set to none and nLoc is set,the TimeLord-Net will return an LI (Leap Indicator) value of 3.

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Issue 2.0


9-4

Network setting menu

Normal time display

Function Time Setting Mode. Press + threetimes to move to Network setting mode.

Function Network Setting Mode. Press^ to select.

Network Setting Mode, with IP address1st byte flashing.

Use + and - to change setting.

Network Setting Mode, with IP address2nd byte flashing.


Network Setting Mode, with IP address3rd byte flashing.


Network Setting Mode, with IP address4th byte flashing.


Network Setting Mode, with Subnetmask 1st byte flashing.


Network Setting Mode, with Subnetmask 2nd byte flashing.


Network Setting Mode, with Subnetmask 3rd byte flashing.



Issue 2.0 9-5

Network Setting Mode, with Subnetmask 4th byte flashing.


Network Setting Mode, with Gatewayaddress 1st byte flashing.


Network Setting Mode, with Gatewayaddress 2nd byte flashing.


Network Setting Mode, with Gatewayaddress 3rd byte flashing.


Network Setting Mode, with Gatewayaddress 4th byte flashing.


Network Setting Mode, withNetwork update flashing.

Use + and - to change setting. Whenset to y the netUpdate software on theTimeLord CDROM is planned to allowinstallation of software upgrades into theTimeLord (available on future versions)

Normal time display

Use + and - to change setting.Network Setting Mode, withsynchronisation alarm status flashing.

Issue 2.0


10-1

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IRIG is a series of time codes originally developed in the 1940sby the International Range Instrumentation Group (IRIG) forrecording time information on magnetic tape and wire for rockettest range instrumentation purposes. IRIG-B code is normallytransmitted at a 100Hz bit rate, amplitude modulated on a 1KHzcarrier, where the amplitude of a 1 bit is three times that of a0 bit.

Standard IRIG-B code contains day-of-year and hours, minutesand seconds information, however a number of organisationshave added their own extensions to the standard format.AFNOR NFS 87 500 timecode is a development of IRIG-B which iswidely used in Europe and contains additional day, day-of-monthand year information.

The IRIG output is available on the TimeLord-Lite andTimeLord-Net / Net-Client versions.

IRIG Setup

The different IRIG settings are detailed in the table below. TheIRIG setting procedure is shown graphically in the diagram tothe right of this text.

Setting the IRIG Signal Time Offset

The IRIG signal is referenced to the current Location setting(see section 4). If the output message is to be referenced toUTC/GMT the location setting should be set to 0.

RS485 level IRIG output

The IRIG signal is available at RS485/422 levels from

Documents

TimeLord Manual