Products Guide
Precision Time Protocol/1588v2 Grandmaster Clock
Key Features
l Creative peek2sync suction window mount design, indoor device with integratedinternal antenna
l GNSS based synchronization, single-SV timingmode supported, only partial sky view required, ±100ns timingaccuracy
l PTP Grand-Master, NTP Server, 1PPS/ToDoutput with adjustable cable length delay compensation
l High stability OCXO based better than 1ppb holdoverperformance
l Multiple PTP profile support, PnP operationwithin selected profile
l 100Base-T, PoE, low power consumption
l Web server, SNMP, CLI configuration and managementinterfaces
Overview
In the modern world, distributionof precise and accurate timing is one of the key requirements to the satisfactoryoperation of many applications. Such synchronization or syntonization is particularlyimportant in areas such as electricity, test and measurement, telecommunications,and industrial automation. Various global navigation satellite systems (GNSS),such as GPS, Glonass and Beidou, can provide international standard based timingreference around the globe. However, expensive equipment is often necessary totap into these timing sources. Installation of an accessary outdoor antenna isusually required, involving careful site selection as well as weather sealingand lightning protection precautions.
The GeckoSynco PTP GM providesa cost-effective indoor GNSS based timing solution, which is particularly easyto install without sacrificing its performance. Based on creative ‘peek2sync’design, an active antenna is internal to this small and light weight device. Ina stationary application, the unit can be set to what is called ‘timing-mode’, capableof maintaining synchronization even if only a single space vehicle (SV, i.e.satellite) is within its line of sight. The integrated design eliminates additionalsignal loss of antenna cable, making it suitable for indoor use. The device isintended to be sucked onto a window from the inside, with a reasonable sky viewto lock to the GNSS, providing high precision timing references for variousapplications.
This product can act as anIEEE-1588 PTP grandmaster with multiple profile choices, a NTP server, oroutput PPS and ToD signals directly to nanoseconds accuracy. Powered over Ethernetcable, it can be up to 100 meters away from its synchronization clients, providingflexibility for available window site selection in a building. Much longerrange is achieved if optical fiber Ethernet or PPS/ToD signaling is used by theclient. This range insensitivity eases installation position tradeoffs oftenfaced by products that require outdoor antenna installations, where rooftop siteand RF cable length constraints are often of practical concerns.
In various digital telecommunicationsystems, syntonization from 100ppm up to 50ppb precisions has always been abasic requirement. With the advent of 4G and 5G mobile technology,synchronization within sub-microsecond accuracy among dispersed base stations isbecoming essential. As base station density increases and large number of smallcells being required to provide the needed coverage and bandwidth, existing GPSsolutions widely used for macro cell base stations prove to be too costly, andmany indoor small cell sites simply do not have easy access to clear sky. It istherefore necessary for multiple base stations to share a single timing source.Since 4G and 5G backhaul is packet based, timing should also be ideally sharedover such RAN sections.
Application-1 For Small cells
Applicatioin-2 For Macro Sites
In electric power industry, accuratetiming is essential for many operations such as teleprotection. Along with thetrend of more and more sensors and actuators, or intelligent electronic devices(IEDs), adopting Ethernet for communication, timing distribution over Ethernetbecomes necessary.
Application-3 For Electricity Teleprotection
The IEEE 1588-2008 PrecisionTime Protocol (PTP) is designed to distribute sub-microsecond timing accuracyto slave nodes in packet based transport environment. The most suitable domainfor PTP is a local area network where timing distribution is limited to a fewintermediate nodes with each step inevitably introduces some degradation to theaccuracy. Therefore for a telecom PTP grandmaster to synchronize city widemobile base stations across metro RAN transport networks is not practical. Thebest practice should distribute individual grandmasters as close to the edge ofthe RAN as possible, such as inside an enterprise complex with many smallcells. Similarly for power systems, grandmasters need to be installed at each substationand other utility sites. Other application areas such as industry automationand test & measurement, it is also desirable to have the timing sourceclose to the factory floors and instrument sites.
The benefit of low cost andeffortless installation features of the GeckoSynco PTP grandmaster clock makesit ideal for widely distributed deployment scenarios as mentioned above. If notused directly as a PTP grandmaster, the PPS/ToD signal may provide timingreference to a boundary clock in the PTP enabled local network.
Since this device can also functionas a NTP server, it may be used as a low cost high security solution forcomputer time keeping in isolated local area networks, where internet connectionto remote time servers is not available.
Application-4 As NTP server for LAN
Specifications
GNSS receiver
w Integrated antenna
w System options: GPS, Beidou, Glonass
Performance
w Time: <100ns (locked to GNSS)
w Frequency: <1ppb (holdover)
w Ethernet: 100BaseT, RJ45
w 1PPS/ToD:RS422,RJ11
Protocols
w PTP profiles: IEEE 1588-2008 default
ITU-TG.8265.1
ITU-TG.8275.1
IEEEC37.238-2011
w NTP: RFC5905
Power Supply
w Class 2 PoE, 100BaseT adapter
w <5w<>
Environment
w Operating: -10℃~50℃, 5~90%non-condensing
w Storage: -40℃~70℃
Mechanical
w Dimension: 120Hx120Wx40D (mm3)
w Weight: <350g<>
Management
w Web server
w SNMP V2/V3
w CLI