Product Documents & Files

Typesort descending Title Date
Technical Notes and Briefs: GPS WEEK NUMBER ROLLOVER ISSUES pdf - 108 KB
Friday, May 25, 2018
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Technical Notes and Briefs: Kannad recommendations following Cobham SB 02/2011 and EASA AD 2011-0103: SL S18XXXXX-25-02 Rev 00 – Issue Jun. 15/2011 pdf - 214 KB
Wednesday, June 15, 2011
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Technical Notes and Briefs: Routing of Data Across Multiple Networks This technical note provides a general description of the software routing scheme of a single Spectracom unit with multiple network ports and offers alternative timing hardware deployments if software isolation is insufficient. pdf - 110 KB
Wednesday, February 13, 2019
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Technical Notes and Briefs: Simulate Now - Testing Without a Cold Reset Normally, a cold reset on a GPS/GNSS receiver under test is required to fully clear previous data to allow a new set of parameters to be used in a simulation. However, when a GNSS receiver is embedded in a product or is being tested on an assembly line, cold resetting a receiver is not always practical. Spectracom GPS/GNSS simulators have the ability to "Simulate Now". It will use the current date/time to match the receiver. It will also match its almanac data to allow for fast testing without the need for a cold reset. pdf - 133 KB
Friday, December 21, 2018
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Technical Notes and Briefs: Check of hook and loop fasteners for mounting mechanisms: S1800000-25-00 Rev 01 – Issue Nov. 22/2013 pdf - 2 MB
Friday, November 22, 2013
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Technical Notes and Briefs: RoHS Compliance pdf - 148 KB
Wednesday, December 12, 2018
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Technical Notes and Briefs: Testing SAASM and Carrier Phase Receivers Orolia's GSG-6 GPS/GNSS simulators can be configured for dual frequency L1/L2 simulation. It generates both the C/A and P code signals simultaneously for the GPS and GLONASS navigation systems. Though it does not have an encryption capability to simulate a true classified P(Y) signal, it is still a powerful tool for acceptance testing of classified Selective Availability / Anti-Spoofing Module (SAASM) receivers. This technical note explains how to use the simulator for military SAASM receiver testing and for also testing commercial carrier phase receivers that use the L2 P(Y) signal. pdf - 148 KB
Monday, December 31, 2018
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Technical Notes and Briefs: Passive Maser Performance & Lifetime Space Passive Hydrogen Maser- Performance and lifetime data. pdf - 1021 KB
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Technical Notes and Briefs: Clock Accuracy in 911 Dispatch Centers Accurate time-of-day is important in Public Safety Communications Centers for time stamping of event records to provide legal evidence of emergency response times in court. Spectracom’s NetClock products automatically keep all the clocks in a center running exactly on time relative to the worldwide time standards. pdf - 123 KB
Thursday, July 26, 2012
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Technical Notes and Briefs: eLoran as a SecureSync Timing Reference Product Brief describing eLoran as a SecureSync timing reference. pdf - 784 KB
Friday, July 15, 2016
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Technical Notes and Briefs: Kannad ELT Product Safety Information Issue A. 05/10/2016 pdf - 3 MB
Tuesday, May 10, 2016
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Technical Notes and Briefs: Email Notification Setup for SecureSync and NetClock 9400 This document is designed to help you configure Email Alerts to generate automatic emails when certain events occur on an Orolia time server with 5.1.x software. pdf - 759 KB
Tuesday, February 26, 2019
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Technical Notes and Briefs: Healthcare Regulations, Standards and Best Practices Relevant to Time Accuracy Professionals in the healthcare field are well aware of the importance of accuracy. There are strong needs and requirements for accurate time in software, databases, all computing devices, network infrastructure, documentation and medical equipment. Besides HIPAA there are many other existing and proposed regulations, standards and best practices that require accurate time for a range of applications from computing systems to quality of care metrics. We provide this list as a reference to the industry. If you know of any updates to these or additional standards related to records management, internal controls, timely diagnosis and care, security and authentication and more, for the healthcare industry, please contact us. pdf - 163 KB
Friday, October 10, 2014
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Technical Notes and Briefs: Lifetime of Space Passive Hydrogen Maser Accurate and ultra-stable space qualified atomic clocks represent critical equipment for the precision Global Navigation Satellite Systems (GNSS). The Passive Hydrogen Maser (PHM), with its excellent frequency stability performance, is the master clock for European Navigation satellite payload, and is the most stable clock ever flown for GNSS. pdf - 500 KB
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Technical Notes and Briefs: Clock Accuracy in Computer Networks Network time synchronization relies on using a secure, accurate and reliable time source to improve network operations and management. pdf - 124 KB
Thursday, July 26, 2012
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Technical Notes and Briefs: Changes in the WWVB Radio Signal Affects Precision Frequency and Timing Reference

Spectracom had used the WWVB signal to synchronize its time and frequency references and master clocks in North America before the wide-spread use of GPS for precision timing applications. The last of these WWVB products has not been promoted for over 10 years and officially went end-of-life in 2005. A change in the WWVB signal was being considered in recent years to reduce impact of electro-magnetic interference and allowing for improved reception in consumer-grade clocks and watches1. However, this change affects the operation of precise time and frequency standards whose receivers are based on phase-locked loops, such as Spectracom WWVB receivers, so these products will no longer operate as intended.

References:
[1] J.P. Lowe, “We Help Move Time through the Air”, Radio World, March 23, 2011, Vol. 35, No. 8 pp. 69, 70.

pdf - 105 KB
Thursday, March 12, 2015
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Technical Notes and Briefs: Vehicle Modeling with GPS Simulation Testing The typical application for a GPS simulator assumes an unobstructed view of the satellites. For advanced testing applications, it is possible to model the placement of the GPS antenna relative to the vehicle body. Starting in application software version 6.2 of the GSG series GPS simulators, vehicle modeling allows the simulated satellite signals to be blocked by the vehicle. Applications of this feature include aircraft maneuvers. pdf - 2 MB
Monday, December 31, 2018
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Technical Notes and Briefs: EpsilTime™ Synchronization Algorithm Spectracom time and frequency synchronization management algorithms, like EpsilTime™ used in models EC20S and EC22S, uses smart predictive technology to mitigate the effects of inherent GPS and oscillator noise, improves accuracy if GPS is lost(holdover), and corrects drift in the 10 MHz and 1PPS outputs simultaneously. That means there are always 10 million frequency cycles between every one pulse-per-second. pdf - 122 KB
Thursday, July 26, 2012
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Technical Notes and Briefs: GPS Radiation Considerations When using a Spectracom GSG series GPS/GNSS signal generator with an optional antenna, one must consider regulations controlling the radiation of GPS-like signals into the air. This document describes the analysis for limiting these signals according to United States requirements. pdf - 205 KB
Thursday, May 3, 2012
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Technical Notes and Briefs: Installing/troubleshooting RS-485 synchronized TimeView digital display clocks When Spectracom Model TimeView® digital display clocks are synchronized via RS-485 normally, all six digits will be present, with the correct time displayed and no portion of the display will be flashing. This document provides tips on pdf - 2 MB
Friday, September 20, 2013
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Technical Notes and Briefs: Space Cesium & Maser Clock Ensemble Space Passive Hydrogen Maser - Performance, Lifetime Data And GIOVE-B Related Telemetries. pdf - 285 KB
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Technical Notes and Briefs: GPS Week Rollover Issues - Public Safety Products PDF - 124 KB
Monday, December 31, 2018
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Technical Notes and Briefs: Outdoor GPS Antenna Installation Considerations Many Orolia timing and synchronization products utilize an embedded GNSS (Global Navigation Satellite Systems) receiver as a primary reference. Typical installations utilize an outdoor active GNSS antenna to collect and transmit GNSS satellite radio signals to the receiver via an RF cable. This technical note describes the main considerations for a successful outdoor GNSS antenna installation for a timing application: pdf - 325 KB
Monday, January 21, 2019
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Technical Notes and Briefs: GPS Lightning Surge Protection Facilities with connections to the outside may suffer damage due to lightning. Electronic components are extremely sensitive to high voltage from major energy sources such as lightning, which is the most common danger. It also has the characteristic of being completely unforeseeable. To protect people and equipment from lightning, it is essential to ensure that all wired connections from building exteriors include the appropriate form of protection. pdf - 134 KB
Wednesday, May 18, 2011
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Technical Notes and Briefs: 2018 KANNAD ELT MAINTENANCE POLICY pdf - 137 KB
Tuesday, January 23, 2018
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Technical Notes and Briefs: Active Maser Clock for Space Clock Ensemble Development Of The Space Active Hydrogen Maser for the Aces Mission. pdf - 700 KB
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Technical Notes and Briefs: Sensor Simulation with GPS Testing GPS simulators are able to test the integration of a GPS/GNSS receiver into a nav system by generating signals corresponding to virtually any condition including vehicle dynamics. They can also generate signals for other sensors for a comprehensive system test. As the simulator generates satellite data for a given trajectory, it simultaneously calculates position and attitude data in six degrees of freedom in real-time; forward/backward, left/right and up/down as well as the rotations about three perpendicular axes, pitch, yaw, and roll; which can be queried and used in integrated test systems. pdf - 181 KB
Monday, December 31, 2018
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Technical Notes and Briefs: A Guide for Testers of GPS Devices and Systems What you want to know about GPS for testers of GPS devices and systems. pdf - 233 KB
Monday, December 31, 2018
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Technical Notes and Briefs: Swiss Space Atomic Clock Technologies and Applications in Space Science pdf - 753 KB
Saturday, February 1, 2014
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Technical Notes and Briefs: Programming Interfaces for Automation and Remote Control for GSG Series Simulators One of the benefits of Orolia GSG Series GPS/GNSS simulators is that it does not require any external controller and can operate for 31 days continuously (longer if the unit is connected to the internet). However, there are many situations where remote control from an external program is helpful and required when integrating GPS signals with other test parameters. GSG simulators can be connected to a PC using Ethernet, GPIB or USB. A SCPI command set allows for remote control and integration into test systems. pdf - 137 KB
Monday, December 31, 2018
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Technical Notes and Briefs: Environmental Modeling with GPS/GNSS Simulators The value of a GPS simulator is to generate RF signals corresponding to real-world scenarios for comprehensive testing from the bench. In addition to features such as multi-path and interference conditions, Orolia’s GSG series GPS/GNSS simulators can simulate signal obscuration via Environmental Models starting in application software version 6.1. pdf - 904 KB
Monday, December 31, 2018
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Technical Notes and Briefs: NTP over Anycast Spectracom NTP services, implemented in its SecureSync and NetClock 9400 platforms, are compatible with an Anycast routing scheme. The NTP over Anycast feature is a combination of the time server’s ability to associate one of its network ports to an Anycast IP address and to remove itself as an available time source if there is a problem with its reference. pdf - 170 KB
Thursday, September 25, 2014
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Technical Notes and Briefs: iSource+ Rubidium Clock Lifetime and MTBF Data LPFRS / RMO / STARLPRO / LNRClok / GRClok Rubidium Clock Lifetime and MTBF pdf - 256 KB
Saturday, November 1, 2104
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Technical Notes and Briefs: Galileo GIOVE Atomic Rubidium & Passive Maser Clocks The Galileo In-Orbit Validation Element (GIOVE) is an experiment led by the European Space Agency (ESA) aimed at supporting the on-going implementation of Galileo, the European Global Navigation Satellite System (GNSS). pdf - 947 KB
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Technical Notes and Briefs: Path Align-R Field Verification Check The following operational checks of the Path Align-R™ may be made by personnel in the field to confirm proper operation of both Path Align-R™ units, their coax cables and the waveguide adapters (transitions). This confirmation may be made prior to climbing the towers or whenever an operational confidence check needs to be made in the field, without access to test equipment or electronic technicians. pdf - 345 KB
Thursday, May 3, 2012
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Technical Notes and Briefs: iSync+ Lifetime & MTBF Performance pdf - 174 KB
Friday, August 1, 2008
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Technical Notes and Briefs: GPS Receiver Mobile Mode Operation Starting with Tsync-PCIe firmware Release version 2.0.0, all TSync-PCIe timing boards that contain an internal GPS receiver have the capability of operating in either the factory default “Standard” mode (Also known as the “Stationary” mode) or can instead be programmed to operate in the available “Mobile” mode (also known as “Continuous” mode). pdf - 151 KB
Tuesday, November 15, 2011
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Technical Notes and Briefs: Synchronizing Windows Computers The purpose of this document is to provide detailed information on synchronizing Windows 7, 2008, 2003 and 2000 Stand-Alone PCs and Domain Controllers, as well as Windows 7, 2008, 2003, VISTA, XP, 2000, NT, 98 and 95 clients with a Spectracom NTP time server. pdf - 2 MB
Tuesday, February 21, 2012
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Technical Notes and Briefs: Atomic Clocks and Timing Systems in Global Navigation Satellite Systems Accurate and ultra-stable atomic clocks have been recognized as the critical equipment for the precision Global Navigation Satellite Systems (GNSS). SpectraTime (SpT) and T4Science (T4S) are space and ground clocks manufacturers of Rubidium Atomic Frequency Standard (RAFS) and Active & Passive Hydrogen Maser (HM) for various navigation systems (European, Chinese and Indian) and other programs. pdf - 689 KB
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Technical Notes and Briefs: In-Field Coax Connector Test Using the Path Align-R A Path Align-R test set can be used in lieu of expensive cable sweeping equipment. Simply attach the Path Align-R to each end of the connectorized coax and measure the “Cable Loss” at the specific frequency the cable will see during operation. Also, if more than one coax is going to be attached to the tower, you can compare the “Cable Loss” of each coax before they are installed. pdf - 205 KB
Thursday, May 3, 2012
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Technical Notes and Briefs: LPFRS Failure Rate Failure rate data for the Spectratime LPFRS timing module. pdf - 167 KB
Tuesday, November 16, 2004
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Technical Notes and Briefs: Epsilon Clock Issue: 2019 GPS Rollover Event In the process of testing the 2019 rollover event, the Orolia Engineering department has determined that this year’s event will potentially affect a limited volume of equipments embedding a Trimble Lassen IQ receiver, despite a Rollover week event compliant notice from the vendor. As a result, the time code may be affected but the GPS will remain locked. The following products have been identified: EC20S, EC22S. Support Bulletin
Wednesday, March 13, 2019
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Visio: 9300 Series NetClock and Related Time Sync Products Visio Shapes Visio shapes for NetClock model 9383, 9389, 9388 and other related time synchronization products. vss - 2 MB
Friday, August 3, 2012
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Visio: Broadcast Network Sync Visio Shapes Vizio shapes for Spectracom synchronization and test products and other network elements typically found in a synchronized digital broadcast network. vss - 182 KB
Friday, August 3, 2012
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Visio: NetClock 9300 Series Rear Panel Visio Shapes Visio shape line drawings of 9383, 9389, 9388 rear panels. vss - 631 KB
Friday, August 3, 2012
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Visio: NetClock 9483 and Accessories Visio Shapes Visio shapes for NetClock 9483 popular configurations - front and rear panels - with typical add-on products. VSS - 570 KB
Monday, October 21, 2013
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Visio: SecureSync Visio Shapes A couple of Visio shapes for the SecureSync modular time and frequency reference system. vss - 36 KB
Thursday, July 11, 2013
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White Papers: A Holistic Approach to Trusted, Resilient PNT Positioning, navigation and timing (PNT) services are indispensable, and providing trusted, resilient PNT solutions requires us to look beyond individual systems and methodologies to focus upon the user. An architecture that can meet this demand must include multiple systems with diverse technologies so that any single threat or source of disruption can be mitigated. This document discusses how signaling technologies such as GNSS, eLoran and STL are the complementary components of this architecture. pdf - 583 KB
Wednesday, May 9, 2018
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White Papers: Tech Brief Resiliency in PNT: Cybersecurity This Orolia Tech Brief explores the basic steps for maintaining security using a network-connected time server and looks at different ways to achieve resiliency in PNT. As an example, we will start with our SecureSync® Time Server product line to demonstrate how to maintain security with this network-connected device. pdf - 351 KB
Friday, February 22, 2019
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White Papers: The Advent of Tightly Synchronized Clocks in Distributed Systems The last decade has brought a paradigm shift in computing systems from single processor devices — whose performance plateaued — to distributed computing systems. In distributed systems, nodes execute concurrently with limited information about what the other nodes are executing at the moment. A key component of distributed coordination is the enforcement of consistent views at all nodes for the ordering of significant events. To this end, events are "timestamped" with logical counters or — increasingly lately — with tightly-synchronized physical time. White Paper
Friday, May 11, 2018
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