tīma2P/2RGPSMasterClocks · 1 Introduction 1.1 ProductDescription tīmaGPSMasterClocksarespeciﬁcallydevelopedforapplicationinprotec …

tīma 2P/2R GPS Master ClocksReference Manual

tima-reference-en v3.14

20099

Copyright NoticeAll information provided in this document is the property of mergedK.

mergedK grants its customers or potential customers the right to download,copy, store and print this document for the sole purpose of assisting them inthe correct application of the products mentioned in this document.

All other uses of this document are expressly prohibited.

Trademark Property Noticetīma and mergedK are registered trademarks of mergedK GmbH.

Contents DisclaimerAlthough the information and recommendations in this document are pre-sented in good faith and believed to be correct as of publication date, mergedKmakes no representations as to the completeness or accuracy thereof.

In no event shall mergedK be responsible for damages of any nature resultingfrom the use of or reliance upon the contents of this document.

Continuous ImprovementsProducts developed by mergedK are continuously improved. The informationin this document may, therefore, be out of date.

Please make sure you have the latest release of this document before pro-ceeding by checking its name and revision code. This information is printedon the front cover of this document, underneath the title. The latest releaseof this document can be downloaded from https://downloads.mergedk.com.Alternatively, you may contact mergedK at any of the addresses provided onthe rear cover of this document.

http://mergedk.com

http://mergedk.com

http://mergedk.com

http://mergedk.com

http://mergedk.com

https://downloads.mergedk.com

http://mergedk.com

Contents

1 Introduction 1

1.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.3 Firmware Versions . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.4 Applicable Models . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.5 Part Number (SKU) and Serial Number . . . . . . . . . . . . . . . 2

1.6 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.7 Attention, Caution, Danger . . . . . . . . . . . . . . . . . . . . . . 3

1.8 General Safety Instructions . . . . . . . . . . . . . . . . . . . . . 3

2 Installation 5

2.1 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.4 Antenna Installation . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.5 Decommissioning and Disposal . . . . . . . . . . . . . . . . . . . 8

3 Operation 11

3.1 Front Panel Indicators . . . . . . . . . . . . . . . . . . . . . . . . 11

3.2 Power Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3 Equipment States . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.4 Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4 Configuration and Equipment Log 17

4.1 The Configuration File . . . . . . . . . . . . . . . . . . . . . . . . 17

4.2 The Log Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.3 Access using SFTP . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.4 WinSCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.5 Other SFTP Clients . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5 Settings 21

5.1 General Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2 GPS Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3 Time Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.4 Out-of-bounds Limits . . . . . . . . . . . . . . . . . . . . . . . . 22

5.5 NTP Access Restrictions and Strata Specification . . . . . . . . . 22

5.6 Serial Time Strings . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.7 Output Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.8 Display Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.9 Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.10 Virtual LANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.11 SNMP (Simple Network Management Protocol) . . . . . . . . . . 26

5.12 Access Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6 Troubleshooting, Maintenance, Equipment Return 29

6.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

6.3 Returning a Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

A Ordering Codes (SKUs) 31

B Technical Specifications 33

C Mechanical Dimensions and Panel Cutouts 37

D Time Strings 39

E Daylight Saving Time Rules 43

F Firmware Upgrade Procedure 47

G Sample Configuration File 49

ii tīma 2P/2R GPS Master Clocks Reference Manual

1 Introduction

1.1 Product Description

tīma GPS Master Clocks are specifically developed for application in protec-tion, automation and control of power systems.

The master clocks provide GPS-derived synchronization signals in differentformats and protocols for use by, among others, protection relays, phasor-measurement units, revenue meters, fault recorders and fault locators.

Signals can be distributed over a dedicated wiring (copper or fiber optic) orusing network-based protocols such as NTP/SNTP.

A bright dot matrix display on the front of the unit provides feedback to sub-station personnel and allows for easy checking of correct configuration of timezones and daylight saving times.

Status can also be monitored remotely using a web browser.

1.2 Key Features

• 60 ns (99%) maximum time deviation

• single or dual 10/100Base-T Ethernet

• RS232 and RS422/485 serial port with PPS output, supports most com-monly used time strings

• timing signal generators for IRIG-B, PPS or PPM signals

• up to six additional outputs (isolated hi-power electrical or optical fiber)

• supports NTP/SNTP

• built-in SNMP agent, with trap generation

• dry contact for remote signaling

• antenna cable delay compensation

• user-configurable rules for daylight-saving-time (DST)

• leap second announcement

1.3 Firmware Versions

Information in this manual applies to firmware revisions 0125-xxx and later.The firmware revision is displayed on the unit’s dot matrix display for a coupleof seconds immediately after power up.

The newest firmware versions and up-to-date versions of this document canbe downloaded from https://mergedk.download.

https://mergedk.download

1.4 Applicable Models

tīma Master Clocks are available in two chassis versions: a narrower one thatsupports only one expansion card (tīma 2P) and a wider one that supportsthree expansion cards and redundant power supplies (tīma 2R).

Each chassis in turn can be ordered with two different front panel heights:1U (44 mm, 1.75 in) or 1.5U (66 mm, 2.625 in).

The tīma 2P chassis (figure 1.1) have SKUs in the form 120XXXX (1U front panel)and 125XXXX (1.5U front panel).

LOCKED

HOLD OVER

ALARM

SERVICE

1003

3

tīma 2PGPS MASTER CLOCK

10033

LOCKED

HOLD OVER

ALARM

SERVICE

1004

1


10041

Figure 1.1: tīma 2P chassis with 1U and 1.5U front panels

The tīma 2R chassis (figure 1.2) have SKUs in the form 130XXXXXXX (1U frontpanel) and 135XXXXXXX (1.5U front panel).

LOCKED

HOLD OVER

ALARM

SERVICE

1005

8

tīma 2RGPS MASTER CLOCK

10058

LOCKED

HOLD OVER

ALARM

SERVICE

1006

6

tīma 2RGPS MASTER CLOCK

10066

Figure 1.2: tīma 2R chassis with 1U and 1.5U front panels

There are no differences between the models apart from the ones describedabove. All information in this document applies to all tīma GPS Master Clockmodels.

1.5 Part Number (SKU) and Serial Number

Part number (SKU) and serial number are stated on the label at the top coverof the master clock, see figure 1.3.

1.6 Unpacking

Unpack the product carefully and make sure that all pertinent parts like an-tennas and surge arresters are put aside so they will not be lost.

Check the contents against the packing list. If any of the contents listed aremissing, please contact mergedK immediately (see contact information at therear cover of this document).

Examine the product for any shipping damage. If the product is damaged,notify the shipping company without delay. Only the consignee (the personor company receiving the unit) can file a claim against the carrier for shippingdamage.

2 tīma 2P/2R GPS Master Clocks Reference Manual

http://mergedk.com

20123

Figure 1.3: SKU and serial number location

1.7 Attention, Caution, DangerThe following symbols are used through this document:

Paragraphs marked in this way contain important information for the correctATTENTION→ installation and operation of the equipment.

Paragraphs marked in this way contain information which, if not properly fol-CAUTION→ lowed, may cause damage to the equipment and/or installation.

Paragraphs marked in this way contain information which, if not properly fol-DANGER→ lowed, may cause personal injury or even death.

1.8 General Safety InstructionsInstallation and operation of the products described in this manual is onlyDANGER→ to be performed by personnel that has been trained or is knowledgeable insubstation protection, automation and control.

This reference handbook is an integral part of the scope of delivery and pro-vides basic instructions for installation and operation of the equipment heredescribed. Shall additional information be needed, please contact mergedKat any of the addresses provided on the rear cover of this document.

Do not open or disassemble the product unless instructed to do so bymergedK.ATTENTION→ The warranty will be void if the product is disassembled or otherwise handledinappropriately.

Introduction 3

http://mergedk.com

http://mergedk.com


2 Installation

2.1 Rear Panel

Due to its modular architecture, tīma master clocks have different rear panels.

Refer to your unit’s SKU and to the information in appendix A (page 31) to findout which configuration is applicable. See section 1.5 on page 2 to locate yourunit’s SKU.

The label on the top cover of the equipment always reflects the particular con-figuration of the unit and can be used to determine the correct allocation ofall connectors and signals, see figure 2.1 for an example.

20073

mergedK GmbH • Reuchlinstr. 10-11 • 10553 Berlin • Germany • www.mergedk.com

S/N

115

5302

1 •

SKU

125

111

5

Mad

e in

Ger

man

y

18-72 Vdc max 10 VA

• • • + -

POWER SUPPLY

50 Ω active antenna

GPS- L1

3.3 Vdc max 100 mA

•

GPS ANTENNA

• PP

S232

• GN

D

• TX

232

• GN

D

TX48

5+ •

TX48

5- •

PPS4

85+

•

PPS4

85- •

SERIAL

10/100 Base-T

ETHERNET A

• •

ALARM

dry contact

max

300 mA @ 300 Vdc UNFUSED!

• OU

T1

• GN

D1

• OU

T1+

• OU

T1-

OUT1

•

Zi = 15 Ω max. 200 mA

ISOLATED OUTPUT

10082

Figure 2.1: Example of rear panel and associated equipment label

2.2 Mounting

tīma master clocks have been designed to be mounted on a 19” rack (tīma 2Rmodels only) or on the front panel of a cabinet (tīma 2P and 2Rmodels). In bothcases, the unit should be mounted using four M6x15 screws (not included).

If mounting a unit on the front panel of a cabinet, refer to appendix C onpage 37 for the recommended panel cutout.

2.2.1 Clearances

Allow adequate clearance for all connections on the rear panel.

Make sure that the clearances provided for the antenna cable respect thespecified minimum bending radius. Minimum bending radius depends on thecable used, see section B.4 (page 35) for applicable values.

If theminimumbending radius of the antenna cable is not respected its impedanceATTENTION→ might be altered, compromising the units performance.

2.2.2 Environment

Make sure that temperatures inside the cabinet do not exceed the limits statedATTENTION→ in section B.1.10 (page 34). Appropriate heating or cooling measures must beprovided to guarantee that this requirement is met at all times.

Also, air humidity should respect the limits described in section B.1.10 (page 34).

2.3 Power ConnectionsThere are twopower supplymodels available for the tīmamaster clocks. Pleaserefer to your unit’s SKU and to the information in appendix A (page 31) to de-termine which power supply is installed. See section 1.5 on page 2 to locateyour unit’s SKU.

Alternatively, use the information provided on the label located on the topcover of the equipment, see figure 2.2.

Make sure that the voltage provided by the power source is within the limitsspecified in section B.1.3 (page 33).

Do not proceed with the installation until you are sure that the correct powerCAUTION→ source is being used.

• • •

80-300 Vdc 85-264 Vac 50/60Hz

max 10 VA

N/-

POWER SUPPLY

F/+

18-72 Vdc max 10 VA

• • • + -

POWER SUPPLY

10074

Figure 2.2: Examples of power supply information on equipment’s top cover

All power connections should use 1.5 mm2 (16 AWG) cross section insulatedflameproof flexible cables and use the header connector supplied with theequipment. To reduce the risk of electrical shock, pre-insulated pin terminalsshould be used on the ends of the power connections.


If using an unit with redundant power supplies, repeat the above steps for thesecond power supply.

A 1.5 mm2 (16 AWG) ground lead shall be connected to the terminal markedDANGER→ with the protective earth symbol to protect the operator against the risk ofelectrical shock.

2.3.1 Fusing Requirements

If compliance with IEC 61010 is required, install an external bipolar circuitATTENTION→ breaker or switch near the unit so that both current-carrying conductors ofthe power supply are interrupted.

DO NOT interrupt the protective earth conductor.

The use of a 10 A, category C, IEC 60947-2 compliant, bipolar circuit breakerwith an interruption capacity of at least 25 kA is recommended.

If using an unit with redundant power supplies, use a separate circuit breakeror switch for the wiring of the second power supply.

2.3.2 Equipment Grounding

For optimal electromagnetic compatibility, use a grounding wire with at leastATTENTION→ 6 mm2 (10 AWG) cross section to connect the grounding bolt at the rear panelof the unit to a good ground point on the mounting cabinet, see figure 2.3.

20115

Figure 2.3: Grounding bolt location

2.4 Antenna Installationtīma master clocks require an active antenna in order to track GPS satellites.

mergedK recommends using the antenna providedwith the unit (SKU 90 02 01 5),but any other active antenna that can be powered from 3.3 Vdc (100 mA max-imum) can be used. Contact mergedK on any of the addresses provided atthe back cover of this document for further information if you wish to use adifferent antenna.

2.4.1 Antenna Location

Mount the antenna outdoors, with the radome pointing skywards and with anunobstructed view of the sky. As far as possible, mount the antenna above anysurrounding buildings.

Installation 7

http://mergedk.com

http://mergedk.com

A partially obstructed sky view might delay or even prevent the initial GPS fixATTENTION→ required to start operation of the master clock.

2.4.2 Antenna Mounting

The antenna has a threaded base that allows it to be mounted through anyhole with a 12 or 13 mm (1⁄2 in) diameter. Maximal thickness of the mountingbase is 4 mm (1⁄6 in).

There is a 50 cm (20 in) long antenna cable routed through the threaded basewith a BNC female connector at its end permanently attached to the antenna.

When mounting the antenna, pay attention that the weather seal is placedATTENTION→ close to the antenna base and that the lock washer is placed on the same sideas the nut.

2.4.3 Antenna Cables

The antenna has to be connected to the master clock by using a 50 Ω coaxialcable with BNC male connectors at both ends.

The antenna cable should be routed through a conduit, shielded from rainATTENTION→ and/or solar radiation. The conduit should not be shared with any power ca-bling.

Total cable attenuation should be less than 45 dB. If using mergedK suppliedcables, following maximum lengths can be achieved:

External MaximumCable Attenuation Diameter Length

RG 58 C/U 100 dB/100 m 5 mm 40 mAircell 5 39 dB/100 m 5 mm 100 mAircell 7 27 dB/100 m 7 mm 150 mLMR-400 17 dB/100 m 10 mm 250 m

Contact mergedK on any of the addresses provided at the back cover of thisdocument to order cables cut to length or if you require help selecting anantenna cable.

2.4.4 Surge Arrester

To avoid lightning damages to the master clock, a Gas Discharge Coaxial SurgeArrester (SKU 90 02 05 6) should be installed at the building or cabinet en-trance.

Mount the surge arrester using a ‘L’-shaped bracket (not included) and groundATTENTION→ it using a cable with a cross section of, at least, 6 mm2 (10 AWG). Use the sameground-point as the master clock to avoid ground-rise-potential damage.

Connect the surge arrester to the master clock using a 50 Ω coaxial cable withBNC male connectors at both ends.

Contact mergedK at any of the addresses shown in the back cover of this doc-ument if you need additional coaxial cables to connect the surge arrester tothe master clock.

2.5 Decommissioning and DisposalThere are no batteries inside of the tīma master clocks and all componentsare ROHS compliant.


http://mergedk.com

http://mergedk.com

http://mergedk.com

Nevertheless, dispose of the equipment in a safe, responsible and environ-mentally friendly manner, observing all applicable country-specific regula-tions.

Avoid incineration or disposal to water courses at all costs.

Installation 9


3 Operation

3.1 Front Panel IndicatorsThe unit’s front panel comprises a dotmatrix display and three LED indicators.

3.1.1 Dot Matrix Display

The dotmatrix displaywill showdifferent information, depending on the equip-ment state.

Immediately after power-up, the display shows the firmware version:Startup:

LOCKED

HOLD OVER

ALARM

SERVICE


10090

During startup the display shows a progress bar and a percentage indicator.The whole startup process takes around 30 seconds.

LOCKED

HOLD OVER

ALARM

SERVICE


10108

At the end of the startup sequence, the unit will display the IPv4 address as-signed to Ethernet port A. This may be:

• the address defined in the configuration file (see section 5.9, page 26)

• an address obtained from a DHCP server in the local network (if no ad-dress is defined in the configuration file)

• a self-assigned link-local address in the address block 169.254.0.0/16 (asdefined in RFC 3927) if no address is defined in the configuration file andif no DHCP server is active on the local network

LOCKED

HOLD OVER

ALARM

SERVICE


10116

After startup, the dot matrix display will show the number of currently trackedFirst lock:satellites. At least 4 satellites are needed to obtain a first fix. Additionallyalmanach and ephemeris data must be downloaded from the satellites andthe UTC offset must be determined.

Ephemeris data has to be downloaded fromeach satellite, this requires severalminutes of strong signal from the tracked satellites.

The UTC offset is broadcast only once every 12 minutes, so that additionallyup to 12 minutes may pass before first lock is achieved, longer if the sky viewis partially obstructed.

LOCKED

HOLD OVER

ALARM

SERVICE


10124

During normal operation the display will show date, time and/or time zoneNormal operation:information. Several formats are available, see section 5.8 on page 25 for de-tails.

LOCKED

HOLD OVER

ALARM

SERVICE

1003

3


10033

If an alarm is detected (e.g. antenna cable open), the display will show theAlarm:corresponding alarm message.

LOCKED

HOLD OVER

ALARM

SERVICE


10132

3.1.2 Locked indicator

Unit is searching for satellites for the first GPS fix. Dot matrix display showsBlinking green:number of satellites currently tracked.

Time reported by the unit is locked to atomic clocks on board the GPS satel-Solid green:lites. Dot matrix display shows local time, date and/or time zone, as config-ured.

3.1.3 Holdover indicator

Time reported by the unit is derived from the internally temperature compen-Solid yellow:sated crystal oscillator. Error estimates are continuously compared to the userdefined thresholds.

If the first error threshold is exceeded, the unit will generate a LOW QUALITYalarm but will continue to report and show time.

If the second error threshold is exceeded, the unit will generate a BAD TIMEalarm and stop showing and reporting time.

3.1.4 Alarm indicator

A level 2 alarm has been raised in the equipment and requires operator atten-Solid red:tion. The dot matrix display will report the alarm cause.

3.2 Power Up Sequencetīma’s power up sequence is shown in figure 3.1.

After power is applied to the unit, a brief short test is performed whereby theAlarm indicator lights up for less than a second. Then the firmware version isbriefly shown on the dot matrix display, while the Holdover indicator is lit.

After that, the firmware will be loaded. This takes around 30 seconds. Duringthis time a progress bar and a percentage indicator will be shown on the dotmatrix display.


STATE INDICATORS DISPLAY OUTPUTS ALARM CONTACT

POWEROFF off off none on (closed)

SELFTEST

Alarm blinks onceHoldover on firmware version none on (closed)

STARTUP offprogress barfollowed byIP address

none on (closed)

NOTIME Locked blinksnumber of satellites

being tracked none on (closed)

GPSFIX Locked blinksnumber of satellites

being tracked none on (closed)

LOCKED Locked on local time as configured off (open)

1

2

3

4

5

1. power applied2. self test (2 seconds)3. firmware load and initialization (approximately 30 seconds)4. satellites acquired, almanach and ephemeris data downloaded5. determined UTC offset (up to 12 minutes, longer if antenna poorly located or weak signal)

Figure 3.1: Power up sequence

At the end of the firmware load, the IP address assigned to Ethernet port Awill be briefly shown on the dot matrix display, but only if a network cable isplugged in.

The equipment will now start tracking satellites. During this phase, the numberof satellites being tracked is shown on the dot matrix display. At least 4 satel-lites are needed to obtain a first fix. Additionally almanach and ephemerisdata must be downloaded from the satellites and the UTC offset must be de-termined.

Ephemeris data has to be downloaded fromeach satellite, this requires severalminutes of strong signal from the tracked satellites.

The UTC offset is broadcast only once every 12 minutes, so that additionallyup to 12 minutes may pass before first lock is achieved, longer if the sky viewis partially obstructed.

Operation 13

Once all needed information is obtained and the internal oscillator is adjustedin phase and frequency, the equipment will enter the Locked state. Only nowwill the unit start displaying the local time on the dot matrix display and dis-tributing time over the outputs, as configured.

3.3 Equipment StatesAfter first lock has been achieved (see section 3.2), tīma master clocks will bein one of four states (see also figure 3.2):

STATE INDICATORS DISPLAY OUTPUTS ALARM CONTACT

LOCKED Locked on local time as configured off (open)

HOLDOVER Locked offHoldover on local time as configured off (open)

LOWQUALITY

Locked offHoldover on local time as configured on (closed)

BADTIME

Locked offHoldover offAlarm on

‘bad time’ message none on (closed)

1

2

3

4

4

4

1. satellites signal too weak, not enough visible satellites2. estimated time accuracy below threshold 1 (default is 500 µs)3. estimated time accuracy below threshold 2 (default is 1 second)4. reacquired enough satellites

Figure 3.2: Equipment states

Enough GPS satellites are being tracked, the internal oscillator is locked inLocked:time, frequency and phase to the atomic clocks on board the satellites.

Calibration factors for the internal oscillator are derived and kept up-to-date.

Not enough satellites can be tracked to compute a solution. Time, frequencyHoldover:and phase are derived from the internal oscillator.

An error estimate is constantly updated and compared against two user-definedthresholds.

Time, frequency and phase are still derived from the internal oscillator. How-Low quality:ever, the error estimate is greater than the first user-defined threshold value.

A level 1 alarm is raised to signal to the user that the first error limit has beenexceeded. The default value for this threshold is 500 µs. See section 5.4 onpage 22 for information about how to change this to a different value.

The error estimate is greater than the second user-defined threshold value.Bad time:


The equipment will raise a level 2 error and stop generating time signals. Thedot matrix display will show a corresponding message.

The default value for this threshold is 1 s. See section 5.4 on page 22 for infor-mation about how to change this to a different value.

Normal operation, with time signal generation and display, is resumed as soonas enough satellites are re-acquired and the error estimate drops below theuser-defined threshold.

3.4 Web Interfacetīma master clocks provide a web interface with a dashboard showing all rel-evant information, see figure3.3. This is a read only page, no sensitive infor-mation is displayed.

The page can be accessed by pointing a web browser to the IP address of theequipment. Only requirement is that the browser supports HTML5 and java-script.

30015

Figure 3.3: tīma’s dashboard

Operation 15


4 Configuration and Equipment Log

This chapters describes the configuration and log files of tīma master clocksand ways to access them.

See chapter 5 on page 21 for a description of the settings and how they affectthe behavior of the master clock.

4.1 The Configuration File

tīma’s configuration file is a single text file (or ASCII file), segmented into Sec-tions. In each section there are one or more Variables. Values are assignedto variables using the equal sign (‘=’).

The structure is very similar to the INI files used in Microsoft Windows, seeappendix G for a sample configuration file.

The configuration file is named tima.cfg. It can be downloaded/uploadedtima.cfgusing the SFTP protocol (user “cfg”, see section 4.3). Some SFTP clients, likeWinSCP (see section 4.4), also allow on-line editing of the configuration file.

If editing off-line, use only “pure text” editors (like Notepad on Windows).

Do NOT use a word-processor (like Microsoft Word or Wordpad) to edit theATTENTION→ configuration file. Word processors insert hidden formatting characters thatwill not be correctly interpreted by the master clock.

Sections and variables are case insensitive, any combination of upper andlower-case letters will be accepted. Most values are also case insensitive, theexception being passwords.

Blank characters (ASCII 32) and tabs (ASCII 08) can be freely used to improvethe legibility of the configuration file.

4.1.1 Sections

The configuration file is segmented into Sections, declared by the followingsyntax:

[SectionName]

i.e. the section name enclosed in square brackets, alone on a line. Sectionsnames are case insensitive.

Section names should be kept on a line of their own. Comments (see below)ATTENTION→ are NOT allowed on lines with section names.

4.1.2 Variables and Values

In any section there are one or more variables, declared with the followingsyntax:

Variable = value

Variable names are case insensitive.

The value is any character on the right side of the equal sign.

Quotes can be used to enclose the values, but they are not required.

If no quotes are present, the value is understood as containing all charactersbetween the first and the last non-blank characters before the comment.

If quotes are present, the value is understood as containing all characters be-tween the quotes, with the quotes themselves not being considered to be partof the value.

The following declarations are identical:

Hello = "this is a long string value"Hello = this is a long string value

4.1.3 Comments

Lines starting with a hash sign (‘#’) are considered to contain comments anddiscarded by the master clock:

# This is a comment, notice the hash sign

Comments can also be given on value lines using a semicolon. Everything afterthe semicolon up to the end of the line is ignored by the master clock:

SomeVariable = some_value ; this is also a comment

4.1.4 Blank Lines

Blank lines (i.e. lines containing only blanks or tabs) can be used to visuallyseparate the sections of the configuration file and increase readability.

4.2 The Log FilesThere are two log files in the master clock:

This file registers major events in the master clock, like power-up, first lock,tima.logtransitions to and from HOLDOVER, LOWQUALITY and BADTIME, configurationfile changes and firmware upgrades.

This file contains the configuration history of the equipment.cfg.log

Log files are “rotated” after reaching a size of 1 MByte: tima.log is renamedinto tima.log.1, tima.log.1 is renamed into tima.log.2 and so on. Thetenth file (tima.log.10) is erased.

The same happens with the cfg.log file.

All log files can be downloaded using the SFTP protocol (user “log”, see sec-tion 4.3).

4.3 Access using SFTPtīma master clocks use SFTP (Secure File Transfer Protocol) to provide accessto the configuration file, the log files and to perform firmware upgrades.

The server runs on port 22 (the default port for SFTP).

Following usernames are defined:


Username Default Password Files

cfg cfg tima.cfg (read/write)log log tima.log and cfg.log (read only)fw fw see Appendix F

On the Windows platform, we suggest the use of WinSCP (refer to the sec-tion 4.4 for details), but any other program that supports SFTP can be used.

4.4 WinSCP

WinSCP can be downloaded from https://downloads.mergedk.com or from theWinSCP developer’s website (http://winscp.net).

You can download an installation package or, instead, use the “portable” exe-cutable. This is just a .EXE file that can be copied and run whitout needing toinstall anything.

When the program is started, you will be prompted for a hostname, usernameand password, see figure 4.1.

30023

Figure 4.1: WinSCP login window

For the hostname, enter the IP address of the master clock1.

Use the suggested values for Port number (22) and File Protocol (SFTP).

Enter the appropriate username and password in the corresponding fields, seesection 4.3.2

After entering hostname, username and password, press the Login button.

If this is the first time that WinSCP is connecting to this particular master clock,you will see a warning about this being an “unknown server”, see figure 4.2.Select “Yes” to add the host key to the cache of known keys.

After accepting the master clock’s fingerprint you will see a screen similar toWindows Explorer: on the left side are the files stored locally on your machineand on the right are the files on the master clock.

1 This IP address is shown briefly at the end of the equipment startup sequence, see section 3.2on page 12 for details.

2 See section 5.12 on page 27 for information on changing the default passwords.

Configuration and Equipment Log 19


http://winscp.net

30031

Figure 4.2: WinSCP warning window

You can click and drag from either window to copy files between your computerand the equipment.

You can also use the built-in editor to edit the configuration file on-line. Changesin the configuration file become active as soon as the file is saved or closed.

4.5 Other SFTP ClientsOn Mac OS X, use Cyberduck3 or ForkLift4. You can also use the built-in com-mand line sftp client.

On Linux, use FileZilla5 or the built-in command line sftp client.

There are also several SFTP clients for the iOS (for example, Transmit6), Androidand Windows Mobile platforms.

3 https://cyberduck.io4 http://www.binarynights.com/forklift/5 https://filezilla-project.org6 https://panic.com/transmit-ios/


5 Settings

This chapter describes the master clock’s settings. See chapter 4 on page 17for the syntax of the configuration file and instructions on how to access it.

5.1 General SettingsThe parameters in this section allow the definition of identifier, location andcontact strings for the unit. These strings are shown on the web-based dash-board and reported as sysName, sysLocation and sysContact over SNMP.They are also included in all log files.

General parameters are defined in section [GENERAL].[GENERAL]

User-defined identifier for the equipment, up to 30 characters long. Default isIDENTIFIERtima-<serialnr>.

User-defined string for the equipment location, up to 30 characters long.LOCATION

User-defined contact string (Email or telephone) for the equipment, up to 30CONTACTcharacters long.

5.2 GPS ReceiverThe parameter ANT_DELAY can be used to compensate the propagation delayin the antenna cable.

Additionally, it is possible to force the equipment to operate in a “fake” mode,where reception of GPS signal and atenna connection are simulated. This canbe usefull during comissioning work, where the equipment is required to op-erate before antenna installation has been completed.

GPS related parameters are defined in section [GPS].[GPS]

Value (in nanoseconds) that corresponds to the delay introduced by the an-ANT_DELAYtenna cable, typically 4 ns/m (1.2 ns/ft).

The exact delay can be computed by:

t =1

c×Kv× l

where c = 3×108 m/s is the light speed,Kv is the velocity factor of the cablebeing used and l is the cable length in meters. Kv is 0.82 for the Aircell 5cable and 0.85 for the Ecoflex 10 plus cable. For other cables, refer to thecorresponding datasheet.

Default value is 60 ns, which corresponds to a 15 m (50 ft) antenna cable.

If TRUE, antenna connection and reception of GPS signals is simulated by theFAKEGPSunit.

The time reported by the unit will not be correct if FAKEGPS is enabled. MakeATTENTION→ sure to set FAKEGPS to FALSE (alternatively, delete or comment-out the linefrom the configuration file) before normal operation.

5.3 Time ZoneThe parameters in this section allow the equipment to derive local time fromUTC. If a daylight saving time (DST) rule is specified, summertime changes willbe performed automatically.

Time zone parameters are defined in section [TIMEZONE].[TIMEZONE]

OFFSET is the time value that has to be added to the local time to get UTCOFFSETduring standard (not daylight saving) time.

OFFSET is positive if the local time zone is west of the Prime Meridian andnegative if it is east.

Time zone abbreviation during standard time. Should not be shorter than 3STD_NAMEletters. Only the first 4 characters are used, default is “UTC”.

Time zone abbreviation during daylight saving time. Only the first 4 charactersDST_NAMEare used, default is blank.

During daylight saving time, local time is one hour ahead of standard time.DST_RULE

DST_RULE should be one of NONE, US, EUROPE (or EUROPE_C), EUROPE_W,EUROPE_E, BRAZIL, or CUSTOM. Default is NONE.

See appendix E on page 43 for details about each of the daylight saving timerules above.

Only used if DST_RULE = CUSTOM. See section E.6 on page 44 for syntax.DST_BEGIN

Only used if DST_RULE = CUSTOM. See section E.6 on page 44 for syntax.DST_END

Configuration for a master clock in Central Europe:Example:

[TIMEZONE]OFFSET = -01:00 ; one hour east of GreenwichSTD_NAME = CET ; central european timeDST_NAME = CEST ; central european summer timeDST_RULE = Europe

5.4 Out-of-bounds LimitsThe parameters in this section configure the user defined out-of-bounds limits.

All values are in milliseconds. Valid values are from 0.001 (1 microsecond) to4000 (4 seconds).

See section 3.3 on page 14 for an explanation of how these limits affect equip-ment operation.

out-of-bounds limits are defined in section [LIMITS].[LIMITS]

threshold for the LOWQUALITY alarm, default is 0.5 ms (500 µs).LOWQUALITY

threshold for the BADTIME alarm, default is 1000 ms (1 s).BADTIME

5.5 NTP Access Restrictions and Strata SpecificationParameters in this section allow fine tuning NTP (the Network Time Protocol).

Section name for NTP fine tunning.[NTP]

Restricts access to the NTP service to hosts in the specified address range.RESTRICTThe subnet should be specified using CIDR (classless inter-domanin routing)


notation in the form A.B.C.D/n where /n is the network prefix (the numberof significant bits used to identify a network). Only /8, /16, /24 or /32 arerecognized as network prefix.

For example, RESTRICT = 192.168.0.0/24 restricts accesss to hosts in therange 192.168.0.0 to 192.168.0.255.

Stratum to be reported by the NTP service during HOLDOVER. Values betweenSTRATUM_HOLDOVER0 and 4 are accepted, default is 0.

Stratum to be reported by the NTP service during LOWQUALITY. Values betweenSTRATUM_LOWQUALITY0 and 9 are accepted, default is 0.

Stratum to be reported by the NTP service during BADTIME. Values between 0STRATUM_BADTIMEand 14 are accepted, default is 0.

5.6 Serial Time StringsParameters in this section allow the configuration of the time reported at theserial port. The configured time string is sent once per second shortly (a fewmilliseconds) after the UTC second rollover.

Serial port parameters are defined in section [SERIAL].[SERIAL]

Selects contents of time string sent over the serial port.TIMESTRING

Possible values areNONE (serial port is disabled), GPZDA,MEINBERG, SAT, SELB1,SELB5, SELB6, SELB8 or TRUETIME. Default is NONE.

See appendix D on page 39 for a detailed description of each TIMESTRING.

The speed at which the time string will be transmitted.BITRATE

Valid values are 1200, 2400, 4800, 9600, 19200 or 38400 bits per second (bps).Default is 9600.

The number of data bits, parity and stop bits to use for the messages trans-FORMATmitted.

Specified using a three-character shortcut in the form dps, where

d number of data bits 7 or 8p parity N (none), E (even), O (odd)s number of stop bits 1 or 2

Default is 8N1.

Selects if the time reported in the time string is local time (LOCAL) or UTC timeTIMEBASE(UTC), default is LOCAL.

If LOCAL is selected, it will be subject to the daylight saving time rules. UTCtime ignores daylight saving time rules.

This parameter selects which PPS pulse refers to the time reported in the timePPSstring.

Possible values are CURRENT or NEXT, default is CURRENT.

If CURRENT is selected, the time string will contain the time stamp of the “cur-rent” PPS pulse, see figure 5.1. This is probably the right configuration if thetime string is not being latched by the PPS signal on the receiving device.

If NEXT is selected, the time string will contain the time stamp of the next PPSpulse (figure 5.2). This configuration allows the use of the PPS signal to latchthe reported time in the receiving device.

Settings 23

12:34:56 12:34:57 12:34:58 12:34:59timeUTC second rollover

PPStime reported in time string 12:34:56 12:34:57 12:34:58 12:34:59

Figure 5.1: Reported time with option PPS = CURRENT

12:34:56 12:34:57 12:34:58 12:34:59timeUTC second rollover

PPStime reported in time string 12:34:57 12:34:58 12:34:59 12:35:00

Figure 5.2: Reported time with option PPS = NEXT

Configures the polarity of the PPS signal (NORMAL or INVERTED), default isPOLARITYNORMAL. The pulse width is fixed at 200 ms.

UTC second rolloverTX

NORMAL PPSINVERTED PPS

Figure 5.3: NORMAL and INVERTED PPS signals

Configuration for a revenue meter, where the time zone and daylight savingExample:time rules are defined in the revenue meter. No PPS signal is used:

[SERIAL]TIMESTRING = TRUETIMEBITRATE = 9600 ; default, could be omittedFORMAT = 8N1 ; default, could be ommitedTIMEBASE = UTC

5.7 Output SignalsThis section allows the configuration of the timing signals that will be gener-ated at the outputs 1 through 6 of the master clock. The number of outputsdepends on the model (tīma 2P has up to 2 outputs, tīma 2R up to six) and theSKU of the unit purchased.

See appendix A on page 31 for information about how to interpret the SKU anddetermine the number and type of outputs available in your unit.

Outputs are defined in sections [OUTPUT1] through [OUTPUT6].[OUTPUTn]

Configures the type of signal that will be generated on OUTPUT n. Valid valuesSIGNALare OFF, PPS, PPM and IRIG-B004. Default is OFF.

Output is disabled.SIGNAL = OFF

A pulse with 200 ms width is generated once per second. The rising edge ofSIGNAL = PPS


the pulse marks the second rollover.

A pulse with 200 ms width is generated once per minute. The rising edge ofSIGNAL = PPMthe pulse marks the minute rollover.

IRIGB is a pulse-width modulated time signal encoding whereas the time/dateSIGNAL = IRIG-B004information is encoded using 100 bits per time frame. The time frame is re-peated every second.

Configures the polarity of the signal at OUTPUT n. Valid values are NORMALPOLARITYand INVERTED. Default is NORMAL.

5.8 Display Settings

This section configures the information presented on the dot matrix display.

The settings are in section [DISPLAY].[DISPLAY]

Selects the information that is shown on the dot matrix display during nor-MODEmal operation. Possible values are 1 (day-of-year + HH:MM:SS), 2 (HH:MM:SS+ STD_NAME/DST_NAME), 3 (HH:MM:SS + OFFSET), 4 (day-of-month month +HH:MM:SS) or 5 (HH:MM:SS + number of satellites used in solution).

Default is 1 (day-of-year + HH:MM:SS).

Displays day-of-year (001 to 366) and local time:MODE = 1

LOCKED

HOLD OVER

ALARM

SERVICE


10140

Displays local time and the appropriate time zone abbreviation (STD_NAMEMODE = 2during standard time, DST_NAME during daylight saving time):

LOCKED

HOLD OVER

ALARM

SERVICE


10157

Displays local time and the current time zone offset (OFFSET during standardMODE = 3time, OFFSET plus one hour during daylight saving time:

LOCKED

HOLD OVER

ALARM

SERVICE


10165

Displays day-of-month, month and local time:MODE = 4

LOCKED

HOLD OVER

ALARM

SERVICE


10173

Displays local time and the number of satellites used in the solution:MODE = 5

LOCKED

HOLD OVER

ALARM

SERVICE


10215

Settings 25

5.9 NetworkThe network parameters for the Ethernet port can be explicitly declared (seebelow) or left blank1 to force the equipment to get the network parametersfrom a DHCP server.

Network parameters are defined in the section [NETWORK][NETWORK]

IPv4 address in the form a.b.c.dIPADDR

Network mask in the form a.b.c.dNETMASK

IPv4 address of gateway in the form a.b.c.dGATEWAY

To use a fixed IP address, all fields fields above have to be specified, otherwisethe equipment will reverto to using DHCP.

To force the master clock to use IP address 192.168.0.50 in a class C privateExample:network with a gateway located at 192.168.0.1, place the following in the con-figuration file:

[NETWORK]IPADDR = 192.168.0.50NETMASK = 255.255.0.0GATEWAY = 192.168.0.1

5.10 Virtual LANsThis section allows the definition of Virtual LANs (VLANs), a broadcast domainthat is partitioned and isolated at the data link layer.

VLANs are specified using sections in the form [VLANid], with id being any num-[VLANid]ber from 1 to 4094. As many as 4094 VLANs can be defined. VLANs can’t useDHCP.

IPv4 address in the form a.b.c.dIPADDR

Network mask in the form a.b.c.dNETMASK

IPv4 address of gateway in the form a.b.c.dGATEWAY

To define a VLAN with id 100 and assing the IP addres 192.168.2.10 in a class CExample:private network with a gateway located at 192.168.2.1, place the following in theconfiguration file:

[VLAN100]IPADDR = 192.168.2.10NETMASK = 255.255.0.0GATEWAY = 192.168.2.1

5.11 SNMP (Simple Network Management Protocol)This section allows configuration of the built-in SNMP agent. There are sepa-rate configurations for SNMPv1, SNMPv2c and SNMPv3 protocol versions.

The associated MIB (SNMP Management Information Base) file can be down-loaded using a web browser from the equipment’s HTTP dashboard.

Section name for SNMPv1 parameters.[SNMPv1]

Read-only community string for SNMPv1. Default is blank (access is disabled).RO_COMMUNITY1 or commented out


Section name for SNMPv2c parameters.[SNMPv2c]

Read-only community string for SNMPv2c. Default is blank (access is disabled).RO_COMMUNITY

Trap community name for SNMPv2c traps.TRAP_COMMUNITY

IPv4 trap destination address (or adresses), specified in the form a.b.c.d.TRAP_HOST1 / TRAP_HOST2

Section name for SNMPv3 parameters.[SNMPv3]

User name for read-only access using SNMPv3. Default is blank (disabled).AUTH_NAME

Password for read-only access using SNMPv3.AUTH_KEY

Authentication protocol to use when validating AUTH_NAME and AUTH_KEY.AUTH_PROTOCOLPossible values are MD5 or SHA. Default is MD5.

5.12 Access PasswordsThis section allows the user to change the passwords for configuration, logsand firmware upgrade. See section 4.3 on page 18 for the accounts associatedwith these passwords.

Enclosing passwords in double quotes is optional. If you choose to do so,please note that the double quotes will be discarded and will not be part ofthe password.

The default passwords are very weak ones. They are provided only as a con-ATTENTION→ venience for initial setup and should be changed before the equipment is de-ployed.

Choose robust passwords, do not use the same password for different units.It is also recommended that the firmware upgrade password be made distinctfrom the configuration password.

Access passwords are defined in section [ACCESS].[ACCESS]

The password that allows reading and writing the configuration file. DefaultCFGpassword is “cfg”.

The password that allows download of the equipment log files. Default pass-LOGword is “log”.

The password that allows upload of firmware upgrade files. Default passwordFWis “fw”.

Settings 27


6 Troubleshooting, Maintenance, Equipment Return

6.1 Troubleshooting

Problem Possible causesant. open message no antenna connectedAlarm LED on antenna cable defective

surge arrester defectivewrong antenna connected

ant. short message short-circuit in antenna cable or connectorAlarm LED on antenna cable defective

surge arrester defectivewrong antenna connected

bad time message poor antenna locationAlarm LED on

6.2 CleaningBefore cleaning the equipment make sure that the primary voltage has beenDANGER→ disconnected.

Should it be necessary to clean the exterior of the equipment, use only a drycloth.

To avoid damages to the electrostatically sensitive electronic parts, no clean-ing of internal parts should be performed.

6.3 Returning a UnitTo return a unit for service, please contact mergedK at any of the addressesfound on the back cover of this document and obtain an equipment returncode (ERC).

Please do not return a unit to mergedK whitout an ERC. mergedK can’t trackATTENTION→ units returned whitout an ERC and will not assume any responsibilities in thiscase.

The equipment shall be sent in its original package or an equally suitable onein order to protect it against impacts and moisture.

Send the unit to the address supplied in the ERC. Please include sender’s iden-tification and ERC on the outside of the package.

http://mergedk.com

http://mergedk.com

http://mergedk.com


Appendix A Ordering Codes (SKUs)

A.1 tīma 2P

SKU 1 2 □ □ 1 □ □Front panel height 1U 0

1.5U 5Power supply 18–72 Vdc 1

80–300 Vdc / 85–264 Vac 2Expansion card none 0

single isolated output 1dual isolated outputs 2

dual open collector outputs 3dual fiber outputs (ST connectors) 4dual fiber outputs (FC connectors) 5

quad open collector outputs 9Check digit X

A.2 tīma 2R

SKU 1 3 □ □ □ □ □ □ □ □Front panel height 1U 0

1.5U 5Power supply 1 18–72 Vdc 1

80–300 Vdc / 85–264 Vac 2Power supply 2 none 0

18–72 Vdc 180–300 Vdc / 85–264 Vac 2

Ethernet ports single port (copper, RJ45 connector) 1additional port (copper, RJ45 connector) 2

Expansion card 1 none 0single isolated output 1dual isolated outputs 2

dual open collector outputs 3dual fiber outputs (ST connector) 4dual fiber outputs (FC connector) 5





Check digit X


Appendix B Technical Specifications

B.1 GPS Master Clock

B.1.1 GPS receiver

• 16-channel GPS receiver• L1 (1575.42 MHz) signal, C/A code• active antenna, up to 250 m [820 ft] cable length• -162 dBm tracking sensitivity• single-satellite operation supported• 60 ns accuracy (99 %)• antenna cable open and short-circuit detection• BNC coaxial connector (female)

B.1.2 Internal oscillator

• digital temperature compensated oscillator (DTCXO)• 0.1 ppm typical drift• user-defined out-of-bounds alarm

B.1.3 Power supply

• operating voltages: 18–72 Vdc or 80–300 Vdc / 85–264 Vac (50/60 Hz)• power consumption: 7 VA max (tīma 2P), 10 VA max (tīma 2R)

B.1.4 Alarm dry contact

• normally closed (opens to signal alarm)• breaking capacity: 300 mA @ 300 Vdc (resistive load)

B.1.5 Isolated electrical outputs

• 5 V and RS422/RS485 signal levels• 200 mA drive capability at 5 V level• up to 50 m [160 ft] cable• 15 Ω output impedance• fully-isolated from remaining outputs• protected against short-circuit and overload• BNC coaxial connector (for 5 V level signal) and/or 5.08 mm [0.2 inch]pitch connector (for 5V and RS422/RS485 level signals)

B.1.6 Open collector outputs

• 250 V max load voltage• 100 mA max load current• current limit protection• fully-isolated from remaining outputs• pin header connector

B.1.7 Fiber-optic outputs

• 820 nm wavelength• optical power: -15.8 dBm into 50/125 µm fiber(-12 dBm into 62.5/125 µm fiber)

• up to 1500 m [1600 yards] multimode optical fiber• ST or FC connectors

B.1.8 Ethernet

• single or dual 10 / 100 Mbps ports for configuration, monitoring andtime-based protocols

• VLAN IEEE 802.1Q support• embedded NTP/SNTP server (protocol version 4), configurable accessrestrictions and strata levels

• SNMP agent, with trap generation (protocol versions v1, v2c and v3)• RJ45 connectors

B.1.9 Serial output

• RS232 and RS422/485 signal level• 1200, 2400, 4800, 9600, 19200, 38400 bps• 7 or 8 data bits, 1 or 2 stop bits• none, even, odd parity• 5.08 mm [0.2 in] pitch connector (includes PPS signal)

B.1.10 Environmental

• rated for operation from -40 to +85 °C [-40 to +185 °F]• 5 to 95%, non-condensing relative humidity• IP40-rated enclosure protection

B.1.11 Dimensions, Weight

tīma 2P:

• width x depth: 269 mm [10.6 in] x 141 mm [5.6 in]• front panel height: 1U (44 mm, 1.75 in) or 1.5U (66 mm, 2.625 in)• unit weight: 1.4 kg [3.1 lb]• shipping dimensions: 400 x 200 x 100 mm3 [15.8 x 7.9 x 3.9 in3]• shipping weight: 2.5 kg [5.5 lb]

tīma 2R:

• width x depth: 483 mm [19 in] x 141 mm [5.6 in]• front panel height: 1U (44 mm, 1.75 in) or 1.5U (66 mm, 2.625 in)• unit weight: 2.3 kg [5.1 lb]• shipping dimensions: 600 x 200 x 100 mm3 [23.6 x 7.9 x 3.9 in3]• shipping weight: 3.5 kg

B.1.12 Type tests

• IEC 61000-4-2: Electrostatic discharge immunity test• IEC 61000-4-3: Radiated, radio-frequency, electromagnetic fieldimmunity test (80 – 2500 MHz)

• IEC 61000-4-4: Electrical fast transient/burst immunity test• IEC 61000-4-5: Surge immunity test• IEC 61000-4-6: Immunity to conducted disturbances, induced byradio-frequency fields (0.15 – 80 MHz)


• IEC 61000-4-11: Voltage dips, short interruptions and voltage variationsimmunity tests

• IEC 60255-5: Insulation coordination for measuring relays andprotection equipment

B.2 Antenna• GPS L1, Glonass G1 active antenna• 50 Ω impedance• +28 ±3 dB typical gain• 3.0 to 5.0 ±0.3 V supply voltage• 15 mA typical current consumption (at 5.0 V)• temperature range: -55 a +85 °C [-67 to +185 °F]• relative humidity: up to 95%• water-proof (IP-67 rated)• UV resistant• weight: 100 g [3.5 oz]• 0.5 m [20 in] cable length• BNC coaxial connector (female)

B.3 Surge Arrester• type: gas discharge• spark-over voltage: 90 V• maximum discharge current: 20 kA• insertion loss: less than 0.2 dB• temperature range: -55 a +85 °C [-67 to +185 °F]• relative humidity: 5 to 95%, non-condensing• weight: 100 g [3.5 oz]• BNC coaxial connectors (female)

B.4 Antenna Cables

RG58 C/U Aircell 5 Aircell 7 LMR-400maximum length 40 m 100 m 150 m 250 mexternal diameter 5 mm 5 mm 7.3 mm 10.3 mmattenuation @ 1.5GHz 100 dB/100 m 39 dB/100 m 27 dB/100m 17 dB/100 mmin bending radius 25 mm 25 mm 25 mm 25 mmweight 36 g/m 36 g/m 72 g/m 100 g/mpulling strength 56 daN 12 daN 2 daN 7 daNDC resistance 53 Ω/km 34 Ω/km 17 Ω/km 10 Ω/kmvelocity factor 0.66 0.82 0.83 0.85connectors BNC (male) BNC (male) BNC (male) BNC (male)temperature range -35 to +80 °C

[-31 to +176 °F]-55 to +85 °C[-67 to +185 °F]

-30 to +80 °C[-22 to +176 °F]

-40 to +85 °C[-40 to +185 °F]

Technical Specifications 35


Appendix C Mechanical Dimensions and Panel Cutouts

C.1 tīma 2P

140.8 mm [5.54 in]

269.2 mm [10.60 in]

225.0 mm [8.86 in]

221.0 mm [8.70 in]

44.0 mm [1.73 in]

48.0 mm [1.89 in]

31.8 mm [1.25 in]

31.8 mm [1.25 in]

TOP

1U FRONT

252.0 mm [9.92 in]

252.0 mm [9.92 in]

PANEL CUTOUT

6.5 mm [0.25 in]

269.2 mm [10.60 in]

66.0 mm [2.60 in]31.8 mm [1.25 in] 1.5U FRONT

252.0 mm [9.92 in]

10017

C.2 tīma 2R

140.8 mm [5.54 in]

434.4 mm [17.10 in]

482.6 mm [19.00 in]

439.0 mm [17.28 in]

44.0 mm [1.73 in]

48.0 mm [1.89 in]

31.8 mm [1.25 in]

31.8 mm [1.25 in]

TOP

1U FRONT

465.0 mm [18.31 in]

465.0 mm [18.31 in]

PANEL CUTOUT

6.5 mm [0.25 in]

482.6 mm [19.00 in]

66.0 mm [2.60 in]31.8 mm [1.25 in] 1.5U FRONT

465.0 mm [18.31 in]

10025


Appendix D Time Strings

D.1 NMEA GPZDA$GPZDA,hhmmss.00,DD,MM,YYYY,SZZ,zz*CC<CR><LF>

When TIME = UTC is selected in the [SERIAL] section of the configuration file,the contents are:

hh UTC hours 00–23mm UTC minutes 00–59ss UTC seconds 00–59DD UTC day-of-the-month 01–31MM UTC month 01–12

YYYY UTC year 2000–2099SZZ local zone hours +00 to ±13zz local zone minutes 00 to 59CC checksum two hexadecimal digits representing the result

of the XOR of all characters between ‘$’ and ‘*’(‘$’ and ‘*’ not included in the computation)

<CR> carriage-return ASCII 13d<LF> line-feed ASCII 10d

Local time zone is the magnitude of hours plus the magnitude of minutesadded, with the sign of local zone hours, to local time to obtain UTC. Localzone is generally negative for East longitudes with local exceptions near theInternational Date Line.

When TIME = LOCAL is selected in the [SERIAL] section of the configurationfile, the contents are:

hh local hours 00–23mm local minutes 00–59ss local seconds 00–59DD local day-of-the-month 01–31MM local month 01–12

YYYY local year 2000–2099SZZ local zone hours fixed at +00zz local zone minutes fixed at 00CC checksum two hexadecimal digits representing the result

of the XOR of all characters between ‘$’ and ‘*’(‘$’ and ‘*’ not included in the computation)


In this case, local time zone is set to +00:00.

D.2 Meinberg Standard<STX>D:DD.MM.YY;T:w;U:hh.mm.ss;uvxy<ETX>

where<STX> start-of-text ASCII 02d

DD day-of-the-month 01–31MM month 01–12YY year 00–99w day-of-week 1–7 (1 means Monday)hh hours 00–23mm minutes 00–59ss seconds 00–59u clock status ‘␣’ : locked to satellites

‘#’ : low quality time signalv equipment status ‘␣’ : all well

‘*’ : alarmx time zone indicator ‘␣’ : local standard time

‘S’ : local daylight saving time‘U’ : UTC

y discontinuity announcement ‘␣’ : nothing to announce(lasts one hour) ‘!’ : start or end of DST

‘A’ : leap second insertion<ETX> end-of-text ASCII 03d

D.3 SAT<STX>DD.MM.YY/w/hh:mm:sszzzzuy<CR><LF><ETX>

where<STX> start-of-text ASCII 02d

DD day-of-the-month 01–31MM month 01–12YY year 00–99w day-of-week 1–7 (1 means Monday)hh hours 00–23mm minutes 00–59ss seconds 00–59

zzzz time zone abbreviation up to 4 characters long (UTC, CET, CEST, …)u clock status ‘␣’ : locked to satellites

‘#’ : low quality time signaly discontinuity announcement ‘␣’ : nothing to announce

(lasts one hour) ‘!’ : start or end of DST<CR> carriage-return ASCII 13d<LF> line-feed ASCII 10d<ETX> end-of-text ASCII 03d


D.4 SEL B1ddd:hh:mm:ss<CR><LF>

whereddd day of the year 001–366hh hours 00–23mm minutes 00–59ss seconds 00–59


D.5 SEL B5l␣YY␣ddd:hh:mm:ss.000<CR><LF>

wherel satellite locked status ‘␣’ : locked to satellite

‘?’ : low quality time signalYY last two digits of year 00–99ddd day of the year 001–366hh hours 00–23mm minutes 00–59ss seconds 00–59<CR> carriage-return ASCII 13d<LF> line-feed ASCII 10d

D.6 SEL B6ddd:hh:mm:ss␣q<CR><LF>

whereddd day of the year 001–366hh hours 00–23mm minutes 00–59ss seconds 00–59q time quality ‘␣’ : locked to satellite

‘.’ : better than 1 microsecond‘*’ : better than 10 microseconds‘#’ : better than 100 microseconds‘?’ : worse than 100 microseconds


Time Strings 41

D.7 SEL B8YYYY:ddd:hh:mm:ss␣q<CR><LF>

whereYYYY year 2000–2099ddd day of the year 001–366hh hours 00–23mm minutes 00–59ss seconds 00–59q time quality ‘␣’ : locked to satellite

‘.’ : better than 1 microsecond‘*’ : better than 10 microseconds‘#’ : better than 100 microseconds‘?’ : worse than 100 microseconds


D.8 Truetime/Kinemetrics<SOH>DDD:hh:mm:ssq<CR><LF>

where<SOH> start-of-header ASCII 01dDDD day-of-year 001–366hh hours 00–23mm minutes 00–59ss seconds 00–59q clock status ‘␣’ : normal

‘?’ : low quality time signal<CR> carriage-return ASCII 13d<LF> line-feed ASCII 10d


Appendix E Daylight Saving Time Rules

E.1 Western European Summer TimeKnown as British Summer Time (BST) in the United Kingdom.

Daylight saving time starts at 01:00 local time on the last Sunday in Marchand ends at 02:00 local time on the last Sunday in October.

Selected by using

DST_RULE = EUROPE_W

in the configuration file.

E.2 Central European Summer TimeDaylight saving time starts at 02:00 local time on the last Sunday in Marchand ends at 03:00 local time on the last Sunday in October.

Selected by using

DST_RULE = EUROPE

or

DST_RULE = EUROPE_C


E.3 Eastern European Summer TimeDaylight saving time starts at 03:00 local time on the last Sunday in Marchand ends at 04:00 local time on the last Sunday in October.

Selected by using

DST_RULE = EUROPE_E


E.4 North-American DST RuleDaylight saving time starts at 02:00 local time on the second Sunday in Marchand ends at 02:00 local time on the first Sunday in November.

Selected by using

DST_RULE = US


E.5 Brazilian DST RuleDaylight saving time starts at 00:00 local time on the third Sunday in Octoberand ends at 00:00 local time on the third Sunday in February.

Selected by using

DST_RULE = BRAZIL


Brazilian DST rule provides an exception should DST end during Carnival,stating that “details will be decided in time”. For this type of exception, use acustom DST rule, see section E.6 for details.

E.6 User-Defined DST RuleTo use a custom DST rule, place the following in the configuration file:

DST_RULE = CUSTOM

Additionally, values for DST_BEGIN and DST_END also have to be defined.

These values can be specified using relative dates (“3rd Sunday in October”)or fixed dates (“the 3rd of March”).

For the specific syntax, see the folowing sections.

E.6.1 Begin / End using relative dates

Use a value in the form

Mm.w.d/hh:mm

to specify day d of week w of month m. Day d must be between 0 (Sunday)and 6 (Saturday). Week w must be between 1 and 5; week 1 is the first week inwhich day d occurs, and week 5 specifies the last d day in the month. Themonth m should be between 1 (January) and 12 (December). Time hh:mmshould be specified as local time.

DST should begin at 02:00 on the second Sunday in March and end at 02:00Example:on the last Friday in October:

DST_RULE = CUSTOMDST_BEGIN = M3.2.0/02:00 ; second Sunday in MarchDST_END = M10.5.5/02:00 ; last Friday in October

E.6.2 Begin / End on fixed dates

Use a value in the form

Jnnn/hh:mm

to specify the ordinal day-of-year (also referred to as Julian day) and thelocal time at which the change to/from DST should occur.

nnn should be in the range 001 to 365. February 29 is never counted, even inleap years.

DST should begin at 02:00 on the 1st of March and end at 00:30 on the 30th ofExample:October:


DST_RULE = CUSTOMDST_BEGIN = J060/02:00 ; 1st Mar is ordinal day 60DST_END = J304/00:30 ; 30rd Oct is ordinal day 304

Daylight Saving Time Rules 45


Appendix F Firmware Upgrade Procedure

There are two ways of upgrading the firmware in the master clock:

• Use a SFTP client to upload the firmware. After a power cycle thefirmware procedure installation is automatically started.

• Use a small Windows program to upload the firmware and start theupgrade procedure.

F.1 Upgrade using a SFTP client1. Obtain the desired firmware upgrade file (extension ‘.fw’) fromhttps://downloads.mergedk.com/private/upgrades

2. Using a SFTP client1, transfer the file to the ‘upload‘ folder of user ‘fw’.Default password for this user is ‘fw’.

3. Turn the master clock off

4. Wait 10 s

5. Turn the master clock on again, the equipment will show the currentfirmware version and the progress bar, as usual

6. At the end of the startup sequence, the dot matrix display will showFW UPGRADE

LOCKED

HOLD OVER

ALARM

SERVICE


10181

soon followed by Checking ...

LOCKED

HOLD OVER

ALARM

SERVICE


10223

and then Working ...

LOCKED

HOLD OVER

ALARM

SERVICE


10199

7. When the upgrade is finished, the dot matrix display will show Done.

LOCKED

HOLD OVER

ALARM

SERVICE


10207


9. Wait 10 s1 See section 4.3 on page 18 for suggested SFTP clients and their configuration.

https://downloads.mergedk.com/private/upgrades

10. Turn the master clock on again, the equipment should show the newfirmware version on the dot matrix display and start as usual

F.2 Upgrade using a Windows application1. Obtain the desired firmware upgrade file (extension ‘.fw’) fromhttps://downloads.mergedk.com/private/upgrades

2. Obtain the Windows executable (‘fw-installer.exe’) fromhttps://downloads.mergedk.com/private/utilities

3. Place both files in the same folder an start the executable with adouble click.

4. After entering the IP address of the master clock to be ugraded and thecorresponding firmware upgrade password, select the appropriatefirware upgrade file:

30049

5. The selected file will be transfered to the equipment, expanded,checked and finally installed:

30056

6. When the upgrade is finished, the dot matrix display will show Done.

LOCKED

HOLD OVER

ALARM

SERVICE


10207


8. Wait 10 s

9. Turn the master clock on again, the equipment should show the newfirmware version on the dot matrix display and start as usual

F.3 Possible Error MessagesChecksum invalid, file corrupted. Try downloading the file fromError 01https://downloads.mergedk.com again.

Digital signature invalid. Only digitally signed firmware upgrade files can beError 02installed.

Wrong firmware version. Upgrade not possible. Contact mergedK.Error 03

Unexpected error. Contact mergedK.Error 99


https://downloads.mergedk.com/private/upgrades

https://downloads.mergedk.com/private/utilities


http://mergedk.com

http://mergedk.com

Appendix G Sample Configuration File

# tima conf igurat ion f i l e# for firmware versions 0125−xxx and la te r

# IDENTIFIER , LOCATION and CONTACT are shown on the dashboard web page and# reported as sysName , sysLocation and sysContact when using SNMP# Replace with values meaningful to the i n s t a l l a t i on[GENERAL ]; IDENTIFIER = any . i d en t i f i e r; LOCATION = somewhere; CONTACT = someone@your . organizat ion . com

# GPS related se t t ings[GPS ]ANT_DELAY = 60 ; antenna cable delay compensation in nanoseconds ( 15m/50 f t of coax cable )FAKEGPS = FALSE ; simulates antenna connection and GPS s igna l reception i f set to TRUE

; ( use for commissioning work only , set to FALSE before normal operation ! )

# Timezone and day l ight saving time rules[ TIMEZONE ]OFFSET = 00:00 ; OFFSET i s the time value that has to be added to the loca l time

; to get UTC during standard ( not day l ight saving ) time .; OFFSET i s pos i t i ve i f the loca l timezone i s west of the Prime; Meridian and negative i f i t i s east . During day l ight saving time; loca l time i s one hour ahead of standard time .; use −01:00 for Central Europe , 03:00 for B ra z i l

STD_NAME = UTC ; timezone abbreviat ion during standard time ( e . g . use CET for Central Europe )DST_NAME = ; timezone abbreviat ion during day l ight saving time ( e . g . use CEST for Central Europe )DST_RULE = NONE ; day l ight saving time rule to use

; possible values are NONE, CUSTOM, US , BRAZIL , EUROPE_C ( or EUROPE ) , EUROPE_E or EUROPE_W; see reference manual for CUSTOM ’ s syntax

# User defined out−of−bounds l im i t s ( in miliseconds )# Val id values are from 0.001 ( 1 microsecond ) to 4000 (4 seconds )[ LIMITS ]LOWQUALITY = 0 .5 ; l im i t for LOWQUALITY alarmBADTIME = 1000 ; l im i t for BADTIME ( stops time display and a l l outptus )

# Set t ings for the Network Time Protocol[NTP ]; RESTRICT = 192 . 168 .0 . 0/24 ; r e s t r i c t time serv ice to a cer ta in subnet

; ( only 32 , 24 , 16 or 8−b i t masks supported ! )STRATUM_HOLDOVER = 0 ; stratum during HOLDOVER (0 . . 5 )STRATUM_LOWQUALITY = 1 ; stratum during LOWQUALITY (0 . . 9 )STRATUM_BADTIME = 10 ; stratum during BADTIME (0 . . 14 )

# Selects datagram contents and speed for output over the se r i a l port[ SERIAL ]TIMESTRING = NONE ; NONE, SELB1 , SELB5 , SELB6 , SELB8 , GPZDA , MEINBERG , TRUETIME or SATBITRATE = 9600 ; 1200 , 2400 , 4800 , 9600 , 19200 or 38400 BPSFORMAT = 8N1TIMEBASE = LOCAL ; timebase to use (UTC or LOCAL )PPS = CURRENT ; t imestr ing re fe rs to CURRENT or NEXT PPS pulse

# Signal generation on OUTPUT1 . . OUTPUT6# ( repeat for a l l outputs )[OUTPUT1 ]SIGNAL = OFF ; OFF , PPS , PPM or IRIG−B004POLARITY = NORMAL ; NORMAL or INVERTED

; [ OUTPUT2 ]; SIGNAL = IRIG−B004; POLARITY = NORMAL

# Selects what i s shown on the unit ’ s dot matrix display[ DISPLAY ]MODE = 1 ; 1 : day−of−year (001 to 356) + HH:MM: SS

; 2 : HH :MM: SS + STD_NAME/DST_NAME of TIMEZONE; 3 : HH :MM: SS + TIMEZONE OFFSET; 4 : dd mmm HH:MM: SS; 5 : HH :MM: SS + number of s a t e l l i t e s used in solut ion

# Network parameters# Comment out ( or delete ) to use DHCP[NETWORK]; IPADDR = 1 7 2 . 1 6 . 0 . 2 2 0; IPMASK = 255 . 2 55 . 2 5 5 . 0; GATEWAY = 1 7 2 . 1 6 . 0 . 1

# VLAN conf igurat ion# ( repeat as often as needed ); [ VLAN10 ]; IPADDR = 1 7 2 . 1 6 . 1 . 1 0 0; IPMASK = 255 . 2 55 . 2 5 5 . 0; GATEWAY = 1 7 2 . 1 6 . 1 . 1

; [ VLAN230 ]; IPADDR = 192 . 1 68 . 0 . 9 9; IPMASK = 255 . 2 55 . 2 5 5 . 0; GATEWAY = 1 9 2 . 1 6 8 . 0 . 1

# SNMP parameters : there are separate sect ions for versions 1 , 2c and 3 . Uncomment to enable .[ SNMPv1 ]; RO_COMMUNITY = publ ic ; read−only community for SNMP v1 agent

[ SNMPv2c ]; RO_COMMUNITY = publ ic ; read−only community for SNMP v2c agent; TRAP_COMMUNITY = secret . trap . community ; trap v2c community , probably d i f f e ren t from RO_COMMUNITY; TRAP_HOST1 = 1 7 2 . 1 6 . 0 . 1 0 ; ip addres to send traps to; TRAP_HOST2 = 1 7 2 . 1 6 . 0 . 2 0 ; i f defined , w i l l send traps to th i s address too

[SNMPv3 ]; AUTH_NAME = whatever . you . want; AUTH_KEY = secret . password ; should be at leas t 8 chars long; AUTH_PROTOCOL = MD5 ; MD5 or SHA , defaul t i s MD5

# Passwords for conf igurat ion , logs and firmware upgrade# ( surrounding quotes are not part of the password )[ ACCESS ]CFGPWD = ” cfg ”LOGPWD = ” log ”FWPWD = ” fw ”

# Leaving DEBUG = TRUE wri tes addi t ional debug information to the log area .# This might be use fu l l i f you need technica l support someday .[DEBUG]DEBUG = TRUE


mergedK GmbH Reuchlinstr. 10–11 • 10553 Berlin • Germany • Tel+49 30 38305710 • www.mergedk.com

Documents

tīma2P/2RGPSMasterClocks · 1 Introduction 1.1 ProductDescription tīmaGPSMasterClocksarespeciﬁcallydevelopedforapplicationinprotec …