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Tekron TCG 01, User Manual

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Tekron TCG 01 User Manual Download Page 20

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Page 14 of 49

6.4

Isolation & Protection

All inputs and outputs feature 2.5kV isolation from each other. In addition, the logic
level outputs (

P2

and

P3

) are each protected against damage from transverse voltage

events via a three-stage network of varistor, auto-resetting fuse, and transient
suppressor diode.

Fuse and varistor protection is

removed

when the switching MOSFET factory

option is fitted. The user

must

provide an external power supply and suitable

fusing to use the MOSFET output option. (See 7.1 TCG 01 High Voltage Output
Option on page 15 for further information on the MOSFET Output option)

Varistor protection and current limiting (nominally 5mA) are employed for protection on
the general-purpose input.

F

Figure 8 – TCG 01 Isolation Zones

Transformer isolation via DC-DC converter is used for the main power supply and for
power to each of the logic output-drive circuits. The serial communications interface is
also separately powered via isolating DC-DC converter. High-speed, fixed delay opto-
isolators are used in each of the time-sensitive signalling paths. The isolation does not
degrade the time accuracy of the output signals, as the fixed delays of the isolating
components (together with the delay associated with the antenna lead-in) are all
internally compensated.

Summary of Contents for TCG 01

Page 1: ...TCG 01 TIME CODE GENERATOR User Manual 9th Edition ...

Page 2: ...www tekroninternational com Page 2 of 49 ...

Page 3: ...s all TCG 01 with firmware revision D1 D8 R Revision History R4 For 0 A B TCG 01 R5 For 0 A B and C4 C7 TCG 01 R6 All C and D up to D1 version TCG 01 R7 All C and D up to D1 version TCG 01 R8 All C and D up to D4 version TCG 01 R9 This document For D up to and including D8 version TCG 01 ...

Page 4: ...utput 10 5 7 P6 Event Recording Inputs or External Sync Input 11 5 8 P7 Sync Relay 11 5 9 P8 NTS network time server optional 12 6 SPECIFICATIONS 13 6 1 Dimensions 13 6 2 Identification 13 6 3 Programmable outputs P2 P3 P4 pin1 13 6 4 Isolation Protection 14 7 FACTORY HARDWARE OPTIONS 15 7 1 TCG 01 High Voltage Output Option 15 7 2 Power Supply Options 16 7 3 Lightning Protection Option 16 7 4 Mul...

Page 5: ...33 C 3 TCG 01 Commands related to Event Time Tagging 33 APPENDIX D NETWORK TIME SERVER OPTION 36 D 1 Configuration Requirements 36 D 2 Methods for Accessing Set Up Mode 36 D 3 Using Telnet to access Set Up Mode 37 D 4 NTS Set Up Mode Menu 38 D 5 Time Server Operation 40 APPENDIX E SERIAL OUTPUT STRINGS 42 E 1 NGTS Time Code O P on P4 42 E 2 IRIG J 17 Time Code O P on P4 42 E 3 String A Time Code O...

Page 6: ......

Page 7: ...t panel display giving visual feedback about the time data being generated on the outputs LED indicators provide at a glance status information F Figure 1 TCG 01 Front Panel The optimised receiver antenna system used by TCG 01 obtains time with similar to atomic clock precision from the GPS satellite constellation The result is output timing accuracy similar to that normally seen only in laborator...

Page 8: ...ould be located in a position with as clear a view of the sky as possible over as wide an angle as possible The antenna should also be mounted in a lightning protected zone as far as is possible In practice this means ensuring that there is at least one other earth bonded structure located in the same rooftop area e g another antenna or a lightning rod that reaches significantly higher than the to...

Page 9: ...res two LED indicators on the front panel together with a 2 line by 16 character LCD display The display is optimised for viewing straight on or from below as the clock is a lightweight device normally mounted at eye level or higher in an equipment bay LCD DISPLAY The display unit updates every second displaying day date time and time offset from UTC It also provides more information on the GPS re...

Page 10: ...the local date The local day of year and time of day are on the bottom line The rightmost bottom three characters provide satellite tracking information UTC denotes UTC time similar to GMT while LST denotes Local Standard Time If daylight savings time is active LST in screen c changes to LDT denoting Local Daylight Time Screen b shows that the clock is operating with a local time offset of 12 hour...

Page 11: ...ution A 0 value means that no updated time solution is available out of lock condition If this condition persists for the Sync Hold time See section 8 3 1 on page 18 the clock will indicate the out of sync condition described under section 4 2 1 Warning Status Indications below A TCG 01 in Acquisition mode attempting to get satellite fixes G Poor satellite geometry Satellites are positioned in alm...

Page 12: ... connected or is short or open circuited faulty 2 short flashes second OFF The GPS antenna is good and the unit is searching the sky for satellites to begin the sync process On D4 and later version TCG 01s a test mode is available that when activated will cause all TCG 01 outputs including the sync relay to behave as if they are in sync even if they are not This can be useful for testing the opera...

Page 13: ...ptions on page 16 has a list of orderable ranges Check the label on the unit base for power supply voltage ratings 5 2 Ant Antenna connector SMA plug The ant antenna input provides an interface for an external active antenna via low loss coaxial cable 50ȍ impedance 5V DC 50mA max is supplied to power an active antenna The total combined gain of the antenna system antenna plus cable and connectors ...

Page 14: ...l Electrical Specification Physical TTL CMOS TTL 5V logic level driver output ports 150mA sink and source The port is fully floating and has independent electrical isolation to 2 5kV 2 pin or BNC RS422 High Speed RS422 compliant output ports The port is Fully floating and has independent electrical isolation to 2 5kV 2 pin or BNC HV MOSFET Power MOSFET Switch allowing switching of 300VA 1A max The...

Page 15: ... used to connect directly to a standard PC serial port A suitable 2m cable is included with each TCG 01 TCG 01F The CTS and DSR functions are permanently asserted so the serial port does not support hardware handshake control The RS232 signal lines are not HV isolated from each other but the port as a whole is isolated to a level of 2 5kV from all other ports 5 4 1 P4 serial strings The serial por...

Page 16: ...e amplitude modulation ratio is 10 3 and peak to peak output level is 8 volts max 100 impedance The output is fully floating and is transformer isolated to a minimum of 2 5kV This output is not programmable for other types of signal and the IRIG B code is present whenever the unit is powered The particular IRIG B data content is as specified by the configuration program refer to IRIG B Options on ...

Page 17: ...t on page 20 for further information on using this feature 5 8 P7 Sync Relay A set of isolated changeover relay output via 3 pin plug able connector capable of switching up to 2A at 230V AC or 300mA at 150V DC Wiring size is to 1 0mm2 using the supplied mating plug Isolation is 2 5kV minimum This relay is active C and NO connected whenever the TCG 01 has established stable time sync from the GPS s...

Page 18: ...ed with existing network management software to provide a complete package Provision is made for up to 5 different IP addresses to be specified for SNMP trap destinations as well as two Syslog IP addresses Accuracy of the NTS time stamps produced is to within 1milliSec of UTC The RJ45 UTP port is not HV isolated from the TCG 01 chassis but complies with the standard balanced nature of a UTP connec...

Page 19: ...ted IRIG B B22x x Programmed pulse sequence In the case of Programmed pulse sequence above separate settings are provided so that a differently programmed pulse sequence can be specified for each of the three outputs Each of the three programmable outputs can also be inverted in its operation Full details on configuring the programmable outputs are contained in section 6 1 on page 13 N B P4 pin1 i...

Page 20: ...utput Option on page 15 for further information on the MOSFET Output option Varistor protection and current limiting nominally 5mA are employed for protection on the general purpose input F Figure 8 TCG 01 Isolation Zones Transformer isolation via DC DC converter is used for the main power supply and for power to each of the logic output drive circuits The serial communications interface is also s...

Page 21: ...wer supply Do not connect the high voltage supply to P2 or P3 unless the high voltage option is fitted check the label on the base of the TCG 01 unit IMPORTANT It is the user s responsibility to provide adequate protection in the form of an external fuse to protect the external power supply the TCG 01 output switch and the load Note At all times the polarity of the P2 P3 connections should be such...

Page 22: ...es and is mounted along side TCG 01 in a 19 rack mount TCG 01 with multi port option ships with both TCG01 and Multi port Hub units pre installed in the rack mount 7 4 1 I O Specification DC Input Range AC Input Range Low L 12 36Vdc 16 24Vac Medium M 20 72Vdc 24 48Vac High H 90 300Vdc 80 120Vac Designator Function Description P9 P10 Inputs 1 2 TTL 600ohm input impedance Share the same logical inpu...

Page 23: ...to this PC with either a straight through DB9 DB9 plug or for DTE TCG 01 s a crossover cable The correct cable for this is supplied with TCG 01 The configuration tool may be run without a clock attached in this case it may view or alter a pre saved configuration file When first loaded the configuration tool will bring up a small status window and scan through available serial ports to find a power...

Page 24: ...llows configuration of TCG 01 s Automatic Daylight savings changes based either on a fixed date or a fixed rule for calculating a date that will be different depending on what year it is Use the Choose City button to access a list of presets 8 3 General Options 8 3 1 Sync Hold Time The Sync Hold parameter is used to control the period after loss of satellite sync that will be tolerated before TCG ...

Page 25: ...izon below which satellites will not be used in time and position calculations A good starting value is 5 degrees and this may need to be increased in areas with land based obstacles to prevent time quality loss due to multipathing effects Increasing this value will reduce the number of satellites in view 8 3 4 Test Mode Test Mode forces TCG 01 to report at all times that it is in sync to satellit...

Page 26: ...n from an external IRIG B signal fed into the first input on the input plug P6 terminals 1 C overriding any information from the GPS antenna This feature allows multiple time code generators from a single antenna The slave TCG 01 receives synchronisation from a master TCG 01 that is producing IRIG B and will use the local time settings that are programmed into the master TCG 01 F Figure 12 Multipl...

Page 27: ... pulse sequence The parameters are as follows A drop down menu allows the user to choose to have pulses output Every second minute hour or day The Pulses field defines the number of pulses that will be produced in the selected time interval Selection is constrained to even divisors of the time interval The Offset data entry boxes specify how much time elapses into the defined time interval before ...

Page 28: ... the configuration tool and press F1 8 5 IRIG B Options 8 5 1 Binary Seconds in IRIG B The Binary Seconds field is an option specified by IRIG standard 200 98 If this option is checked all of the outputs programmed for IRIG B code including the amplitude modulated output will include the Binary Seconds of Day data 8 5 2 IRIG B Extensions IRIG Standard 200 98 specifies a 27 bit control field in the...

Page 29: ... and the elevation is 90 at this point The edge of the display elevation 0 represents the horizon The azimuth is a compass direction where 0 represents true north 90 is east and 180 is south Satellites being used are marked by a coloured cross on the display and a blue bar on the Satellite Signal Strength Indicator otherwise it is gray on both Right clicking over the Visible Satellites area brings...

Page 30: ...ttons only if TCG 01 has no satellite tracking history To clear tracking history remove the antenna and cycle power or use the Reset GPS button although be prepared to wait It may take half an hour for the GPS with a good antenna connected to fully recover from a reset The ability to force any time and date into the instrument means that TCG 01 can be used as a convenient signal source for testing...

Page 31: ...6 10mm Black Polyethylene Bending Radius 40mm maintaining less WKDQ impedance change at bend Weight 0 051 kg metre Temperature Range 40o C to 85o C Impedance 50 Velocity 84 Capacitance 79 4pf metre Centre conductor 10 5 per 1000 metre DC Resistance Shield 2 8 per 1000 metre Attenuation 0 33dB per metre 1575 42MHz L1 Shielding 90dB Phase Stability 10ppm degree C Care should be taken during installa...

Page 32: ...c 0 5V Typical 20mA Current Drain Maximum 27mA Typical 38dBi Total Gain At 90º elevation 30dBi Attenuation 60dB at 1525MHz 1625MHz 50MHz on centre frequency Output VWSR Typical 1 5 Output VWSR Maximum 2 5 Lightning Protection 80V for IEC100 4 5 standard A 3 Antenna Assembly NAIS Antenna Mounting The NAIS GPS antenna assembly for a 42mm max outer diameter 1 inch 32mm inner diameter nominal galvanis...

Page 33: ...r The base of the pipe needs to be accessible for the cable entry if this is not practical then a hole or slot can be made in the side of the pipe to allow the cable to enter and be passed up to the top of the pipe 3 Position the antenna cable inside the pipe protruding from the top 4 Screw the four stainless steel mounting screws in to the antenna mount so that they become captive and then pass t...

Page 34: ...ss of whether a separate lightning protection device is to be fitted to the antenna lead in cable In areas with a low incidence of electrical storms careful attention to antenna positioning and earth connections may be all the protection deemed necessary The antenna lightning protection kit LPK01 affords additional security through the use of an impulse suppressor installed in the antenna lead in ...

Page 35: ...ng the protector so that the incoming antenna lead comes through the wall about 150mm away from the protector s connector This provides some space to ease the incoming cable into a gentle arc back on to the connector The antenna cable must be cleanly cut at the appropriate point and the resulting two ends terminated with the N type connectors provided The connectors are then attached to the protec...

Page 36: ...www tekroninternational com Page 30 of 49 F Figure 16 N Type connector cable preparation and termination ...

Page 37: ...ON INTERNATIONAL DISCLAIMS ANY LIABILITY OR RESPONSIBILITY FOR THE RESULTS OF IMPROPER OR UNSAFE INSTALLATION PRACTICE INCLUDING BUT NOT LIMITED TO ANY EXCESSIVE PERFORMANCE DEGRADATION OF THE ANTENNA SYSTEM RESULTING FROM INCORRECT FIELD INSTALLATION OF COAXIAL CABLE CONNECTORS ...

Page 38: ... for time tag storage purposes thus allowing accuracy to equate to resolution Each tag record includes the input channel number as well as the clock sync status as at the tag time Tag Storage TCG 01 stores Time Tags in a data queue designed as a circular buffer The maximum number of time tags that may be stored is 512 If further events occur when the buffer is full TCG 01 sets an overflow status a...

Page 39: ... the TCG01 native serial protocol does not include station addressing In a network connected system the address of the Serial to Ethernet interface device can serve as the station address Tekron International can supply such devices if required P Ps command Get Status The Ps command invokes a Ps response that contains the clock status which includes the number of tags currently in the time tag eve...

Page 40: ...A converter used for oscillator control Range is ASCII to del hex 40 to hex 7F 23 Frequency Error Local Oscillator frequency offset as compared with GPS received signal In ASCII 00000 99999 referenced to 1E 12 Notes concerning the Ps command An ASCII space is transmitted if there is no alarm condition present 1 TCG 01 can track up to 12 satellites simultaneously The message limitation of 9 is to r...

Page 41: ...ter ASCII hex 3A 14 15 Second of Minute in ASCII 00 60 16 Delimiter ASCII hex 2E 17 23 Fraction of Second in ASCII 100 s of nanoseconds 0000000 9999999 24 Quality Indicator Codes are ASCII space hex 20 if receiver locked sub 100nS Output accuracy ASCII hex 3F if receiver unlocked for more than 1 minute ASCII hex 2A if receiver in alarm mode antenna fail 25 27 Outage Indicator 000 999 Hours since r...

Page 42: ... configure the NTS properly a The fixed local network address IP address to be assigned to the NTS b The number of bits in the netmask that the local network assigns to hosts The default setting of 0 results in automatic allocation c The IP address of the gateway router only necessary if the NTS is required to service clients on multiple sub nets The default is all null no subnets d The IP address...

Page 43: ...within a DHCP environment to fetch a dynamic address if it does not already have a fixed address configured Each time server has a unique system name that will show up on the DHCP Server s active lease list within a few seconds of the DHCP Server granting an address to the NTS Examination of the list will reveal the allocated address The naming convention used by the time server is a C followed by...

Page 44: ...if the NTS is powered down or reset unless the full Set Up procedure is completed and all of the changes stored permanently using option 9 on the Set Up menu D 4 NTS Set Up Mode Menu The NTS Set Up mode menu displays the configuration of the time server followed by a menu The menu display is similar for both configuration tool and network access Hardware Ethernet Autodetect IP addr 0 0 0 0 DHCP BO...

Page 45: ...opriate The parameters that can be set are as follows B Broadcast Mode Defaults to N If Y is selected the unit prompts for a poll interval The unit will then broadcast time packets at the interval specified Note that while in broadcast mode the unit will still respond to NTP SNTP client requests in the usual manner In most applications Broadcast Mode is not used so the default is the appropriate s...

Page 46: ... system logs These parameters are really only useful in networks running full SNMP network management systems Similarly the following S Syslog facility code parameter is only useful on full SNMP network systems Once configuration is complete the set up session may be terminated via option 9 9 Exit and Save The NTS will then reset and begin normal operation Note that the HyperTerm response on the P...

Page 47: ...S address F Figure 18 Time server port on TCG 01 showing lck lnk err and sec indicators The green lnk LED indicator on TCG 01 lights when a network cable UTP drop lead is correctly connected between the TCG 01 RJ45 port and the local network hub switch The other green LED the lck indicator lights up steadily when the NTS is correctly synchronised with UTC time Provided that TCG 01 is already synce...

Page 48: ...y of week 01 Monday 07 Sunday hh Two digit hour mm Two digit minute x Time mode 0 Local time 1 UTC time CR Carriage Return HEX 0A LF Line Feed HEX 0D Example Interpretation T020422112340 CR LF Monday 22 April 2002 12 34 local time E 2 IRIG J 17 Time Code O P on P4 About This code is compatible with IRIG Standard 212 00 Timing Transmitted once every second The leading edge of the start bit of the f...

Page 49: ...6 CR LF day 112 time 12 34 36 100uS sync error About This code is very similar in data content to the IRIG J 17 code but adds a two character field containing the year and uses 8 bit ASCII no parity data format Timing Transmitted once every second The leading edge of the start bit of the first character SOH is exactly on the second that the message describes Comms 9600bd 8 bit ASCII no parity Defi...

Page 50: ...iling spaces as described in the definition are invisible E 6 String D Time Code O P on P4 Tekron D is IDENTICAL in content to String B but the second mark is at the leading edge of the start bit of the CR Example Interpretation SOH 112 12 34 36 CR LF day 112 time 12 34 36 100uS sync error About This code is effectively a combination of String A and String B It provides both year information and a...

Page 51: ...ime follows 55 ASCII 55 means UTC day of year follows ddd Local day of year 001 365 hh Local hour of day 00 23 mm Local minute of day 00 60 ss seconds 00 59 DDD UTC Day of year 001 365 HH UTC hour 00 23 MM UTC minute 00 59 BEL HEX 07 About This provides time year information and a sync indicator field Timing The string is transmitted once every second with the leading edge of the start bit of the ...

Page 52: ...t from UTC in hours yy Local time zone offset from UTC in minutes ASCII CC 2 digit hex representation of the result of XORing the 8 data bits of each character between but not including the and 00 FF CR LF HEX 0A 0D set to zero when UTC time in ASCII string is selected About This string is compatible with and defined by the NMEA 0183 standard Timing Transmission is once every second The leading ed...

Page 53: ...ees minutes 000 00 0000 359 59 9999 W Longitude east west E east W west DDMMYY UTC day of month month 2 digit year E ASCII E CC 2 digit hex representation of the result of XORing the 8 data bits of each character between but not including the and CR LF HEX 0A 0D About This string is compatible with and defined by the NMEA 0183 standard Timing Transmission is once every second The leading edge of t...

Page 54: ...relationship The information recommendation description and safety notations in this or other documents supplied by Tekron are based on general industry experience and judgement with respect to such hardware and software THIS INFORMATION SHOULD NOT BE CONSIDERED TO BE ALL INCLUSIVE OR COVERING ALL CONTINGENCIES NO OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR...

Page 55: ...arks of Microsoft Corp WinOncore12 and Oncore are trademarks of Motorola Inc Copyright 2003 Tekron International Ltd All rights reserved No part of the contents of this document may be transmitted or reproduced in any form or by any means without the written permission of Tekron International Ltd Published in New Zealand WARNING This product has been designed to comply with the limits for a Class ...

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