GPS6000-LITE User Manual version 1.0
Contents
1. CABLE DELAY OFFSET 6 0 LI ld lal lal lal Lel le La ANTENNA STATUS RA GPS6000 GNSS TIMI DECODER Figure 2 4 The cable delay offset switch bank 4 GPS6000 LITE GPS Time Receiver User Manual Version 1 0 Section 2 Installing the GPS6000 LITE For example to set a total cable length of 14m or 00001110 in binary set the 8m 4m and 2m switches on as shown in figure 2 5 below worldtime ANTENNA STATUS GPS6000 GNSS TIME DECODER Figure 2 5 Example 14m cable delay offset Alternatively to set a total cable length of 59m or 00111011 in binary set the 32m 16m 8m 2m and 1m switches on as shown in figure 2 6 below worldtime CABLE DELAY OFFSET ANTENNA STATUS GPS6000 GNSS TIME DECC DER Figure 2 6 Example 59m cable delay offset GPS6000 LITE GPS Time Receiver User Manual Version 1 0 5 3 System operation Operation of the GPS6000 LITE is fully automatic The following theory of operation is supplied as a reference to allow the user to gain a basic understanding of the technology used in the GPS6000 LITE 3 1 Theory of operation When first powered up the GPS6000 LITE initiates a cold start search acguisition process GPS Satellites are tracked and an initial location timing solution is computed Typically the search acquisition process will complete within one minute After the search process has been successfully completed the GPS6000 LITE begins downloading G2. GPS6000 LITE GPS Time Receiver User Manual Version 1 0 1 worldtime SOLUTIONS COPYRIGHT 2015 World Time Solutions Limited All Rights Reserved All information contained within this document is the property of World Time Solutions Limited and cannot be used or reproduced by any person or company without written consent from World Time Solutions Limited World Time Solutions Limited reserves the right to make periodic amendments to the information in this document without notice TRADEMARKS All registered trademarks and trademarks are property of their respective owners RoHS COMPLIANCE World Time Solutions Limited works with its suppliers to ensure all products comply with the Restriction of Hazardous Substances ROHS directive For further information please visit our web site at www worldtimesolutions com rohs html DISPOSAL pt Please dispose of this unit properly To minimize pollution and help protect the environment this unit should be recycled For further information and or to view a copy of the World Time Solutions Limited Waste Electrical and Electronic Equipment Policy please visit our web site at www worldtimesolutions com recycle html SOFTWARE LICENCE This product contains proprietary World Time Solutions Limited software This software is supplied under the World Time Solutions Limited Software Licence Agreement For further information or to view a copy of the software licen
3. PS almanac data containing orbit and status reference information for each satellite vehicle along with UTC offset data The GPS6000 LITE must continuously track the GPS satellites for around 15 minutes to download a complete almanac Once the almanac download is complete the GPS6000 LITE begins transmitting time data and enters self survey mode In self survey mode the GPS6000 LITE computes a highly accurate reference location by averaging multiple position fixes After a successful self survey has completed approximately 35 minutes of uninterrupted GPS tracking the computed reference location is stored and the GPS6000 LITE moves to high accuracy timing mode In this mode the GPS6000 LITE is able to provide time data accurate to within 30 nsec of UTC Note that if your GPS6000 LITE has previously performed a full self survey and the location has not changed a new self survey will not be performed The GPS6000 LITE will move directly from almanac download to high accuracy timing mode If the GPS6000 LITE has previously performed a full self survey and the location has changed a new self survey will be performed 3 2 Operation in non static applications The GPS6000 LITE is optimised for use in static installations In normal operation the GPS6000 LITE performs a self survey then switches to high accuracy timing mode where the system corrects only for clock errors In this mode the GPS6000 LITE assumes the location does not ch
4. ange It is possible to use the GPS6000 LITE in non static applications However the system will not operate in high accuracy timing mode and timing accuracy will be degraded 6 GPS6000 LITE GPS Time Receiver User Manual Version 1 0 Section 3 System operation 3 3 Synchronisation status The status LED provides a visual indication of the synchronisation status of your GPS6000 LITE In normal operation the status LED will be flashing green A red LED indicates the system is not synchronised or there is an error See table 3 1 for more details LED Status U O System booting Searching downloading almanac data Single green flash Double red flash Antenna disconnected Triple red flash Antenna shorted Table 3 1 Status LED functions More detailed status information can be accessed via your time server The GPS6000 LITE fully integrates with your time server providing real time diagnostics and active antenna monitoring Please refer to the user manual for your time server for further details GPS6000 LITE GPS Time Receiver User Manual Version 1 0 7 A Specifications Timing performance Synchronised accuracy 30 nsec 1 sigma GNSS decoder GNSS engine Anti jam capable 32 satellite parallel tracking Minimum acquisition 148dBm cold start sensitivity Minimum tracking 160dBm sensitivity Operating temperature 0 to 50 C Relative humidity 0 95 noncondensing Enclosure 85 x 65 x 30
5. ce please visit www worldtimesolutions com LIMITED WARRANTY The GPS6000 LITE GPS Time Receiver is guaranteed against failure due to faulty parts or workmanship for a period of five 5 years from date of purchase In the event of product failure due to faulty parts or workmanship within the warranty period World Time Solutions Limited at its own discretion will either a repair the product b supply a replacement product c supply a functionally equivalent replacement product or d refund the purchase price of the product The limited warranty will not apply if a the product has not been installed or operated as per our instructions b the product has been modified in anyway In the event of failure the GPS6000 LITE should be returned to the manufacturer for inspection and repair Please visit our support pages for further details www worldtimesolutions com support html TECHNICAL SUPPORT To obtain help with the installation or operation of the GPS6000 LITE please visit our web site at www worldtimesolutions com support html II GPS6000 LITE GPS Time Receiver User Manual Version 1 0 1 Introduction 1 1 Overview The GPS6000 LITE accurately synchronises your time server with international atomic standards With 32 satellite parallel tracking and class leading high performance design the GNSS decoder supplies time data accurate to within 30 nsec of UTC The user programmable cable delay compen
6. e achieved by choosing a window facing towards the equator ensure the window is not coated with a metallised film as this may disrupt the GPS signals Having chosen a suitable installation location secure the GPS antenna in position using the adhesive tape supplied Once installation is complete connect the antenna cable to the ANTENNA connection on the front of the GNSS decoder 2 2 Installing the GNSS decoder The GNSS decoder converts the raw satellite data into highly accurate time information The decoder should be installed internally close to the GPS antenna the GPS antenna has a captive 3m 9ft pre terminated coaxial cable for connection to the decoder PLEASE NOTE THE GNSS DECODER IS NOT SUITABLE FOR EXTERNAL INSTALLATION The decoder should be secured in position using the integral surface mounting brackets Care should be taken to ensure the fixings used not supplied are suitable for the application Figure 2 1 below details the enclosure bracket fixing dimensions 2 x 5 5mm fixing points 81 5mm centre spacing Figure 2 1 GNSS decoder enclosure mounting dimensions 2 GPS6000 LITE GPS Time Receiver User Manual Version 1 0 Section 2 Installing the GPS6000 LITE OUTPUT Ne worldtime Da carci CABLE DELAY OFFSET BARB ABAS ANTENNA 9 GPS6000 GNSS TIME DECODER www worldtimesolutions com Figure 2 2 The GNSS Decoder front Figure 2 3 The GNSS Decoder rear 2 3 The outpu
7. mm 3 35 x 2 56 x 1 18 aluminium enclosure with wall mount brackets Weight 0 2 kg Cable delay compensation User programmable Status monitoring Fully integrated diagnostic system with active antenna monitoring Multi colour status LED Antennas 7 8 GPS6000 LITE GPS Time Receiver User Manual Version 1 0 Appendix A Specifications Cabling Antenna cable 3m 9ft captive pre terminated RG 174 SMA coaxial Output cable 5m 16ft pre terminated Belden 9502 two pair plus drain 24 AWG stranded cable with 100 foil shield and semirigid sunlight resistant Polyvinyl Chloride PVC jacket Standards compliance Electrical Safety BS EN 60950 1 2006 Radio Disturbance BS EN 55022 2006 Immunity Characteristics BS EN 55024 2003 RoHS Compliant Scope of supply GPS6000 LITE scope of 1 x GNSS decoder supply 1 x GPS antenna with 3m cable 1 x 5m output cable GPS6000 OUT 15 15m 49ft output cable GPS6000 OUT 50 50m 164ft output cable GPS6000 OUT 150 150m 492ft output cable GPS6000 LITE GPS Time Receiver User Manual Version 1 0 9 World Time Solutions Limited 1st Floor Barclays House Gatehouse Way Aylesbury Buckinghamshire HP19 8DB United Kingdom 44 0 1296 331428 sales worldtimesolutions com www worldtimesolutions com
8. oviding time data accurate to within 30 nsec of UTC At this level of accuracy taking account of cable lengths becomes critical Every metre of cable between the GNSS antenna and your time server causes an additional error of approximately 5 nsec For long cable lengths this accumulated error can become very significant The cable delay offset provides a simple solution to correct for errors due to cable propagation delays The total cable length between the GNSS antenna and your time server is entered using the switch bank The GNSS decoder then automatically advances the time data by the required offset to correct for the cable propagation delay GPS6000 LITE systems are supplied with the correct cable delay offset value pre programmed For a typical installation this preset value should not need any adjustment However if required the cable delay offset can be programmed using the following guidelines 2 4 1 Programming the cable delay offset PLEASE NOTE THE PRESET CABLE DELAY OFFSET SHOULD NOT NORMALLY REQUIRE ANY ADJUSTMENT The cable delay offset is programmed in metres using the cable delay offset switch bank The total cable length in metres should be encoded in an 8 bit binary format and entered into the switch bank Switches set to on the upper position are summed As shown in figure 2 4 below the left hand switch is the most significant bit 128m and the right hand switch the least significant digit 1m worldtime
9. sation ensures timing accuracy is maintained even over long cable runs The system has been engineered to ensure reliable performance The high sensitivity GPS6000 decoder allows for operation in the most demanding weak signal and hostile RF environments The GPS6000 fully integrates with your time server providing real time diagnostics and active antenna monitoring Installing the GPS6000 LITE is simple Both cables are supplied pre terminated The GPS6000 has also been purpose designed to allow cost saving installation into your data centre optionally connecting to your time server via existing cat 5 structured cabling 1 2 Scope of supply Scope of supply e 1x GPS active patch antenna with 3m cable e 1x GNSS decoder 1x 5m output cable e 1x user manual 1 3 Options e GPS6000 OUT 15 15m 49ft output cable e GPS6000 OUT 50 50m 164ft output cable e GPS6000 OUT 150 150m 492ft output cable GPS6000 LITE GPS Time Receiver User Manual Version 1 0 1 2 Installing the GPS6000 2 1 Installing the antenna To ensure reliable operation the GPS antenna needs to have at least a partial view of the sky increasing the amount of sky visible will provide correspondingly better performance The antenna should be mounted either externally in a protected position or in an internal position with a view of the sky for example on a window ledge If you choose to mount your antenna internally best operation will b
10. t cable The system is supplied as standard with a pre terminated 5m 76ft output cable for the connection between the GNSS decoder and your time server Longer cables are optionally available if reguired Alternatively the output cable may be extended using Belden 9502 cable up to a maximum total length of 150m 492ft Table 2 1 details the cable colour scheme Terminal ID Cable colour code GND Cable screen drain wire Black Red Black White po fwhite Table 2 1 Output cable connection detail For low smoke plenum applications the supplied cable should be substituted for a Belden 82502 or equivalent type cable 2 3 1 Optional connection using structured cabling To enable simple installation into a data centre or office complex the GNSS decoder may be connected to your time server using category 5 category 5e or category 6 structured cabling Table 2 2 below details the suggested RJ45 8P8C pin connections Using this configuration cable lengths of up to 300m 984ft may be used reliably RJ45 T568A Colour T568B Colour GNSS decoder 8P8C pin a pin 1 White Green White Orange s ju J White Orange White Green P4 feue ide 1 e forane oreen b e bom eom oo Table 2 2 RJ45 8P8C structured cabling wiring detail GPS6000 LITE GPS Time Receiver User Manual Version 1 0 3 Section 2 Installing the GPS6000 LITE 2 4 The cable delay offset The GPS6000 LITE is capable of pr
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