Meridian II Datasheet
Contents
1. the user selected format of the CPU AM Code output Signal types IRIG B1 20 IEEE 1344 IRIG B 22 IRIG B123 NASA 36 or 2137 Signal level and connector 1 Vrms BNC Low Phase Noise Output Module This module outputs four spectrally pure frequency signals with high port to port isolation When distributing low phase noise best practice is to establish direct point to point connections to receiving equipment with high quality cable The low phase noise level and stability is dependent on the Meridian II s reference oscillator Signal types 5 10 MHz Signal level and connector 1 3dBm BNC Sine Wave Output Module This module adds four frequency outputs to your Meridian II for customers that do not need high performance low phase noise The stability is dependent on the Meridian II s reterence oscillator Signal types 1 5 or 10 MHz Signal level and connector 1 3dBm BNC Telecom Clock Module This module adds two telecom outputs to enable Meridian II as a Primary Reference Clock A full suite of telecom signal types and formats are available to provide high stability Building Integrated Timing Supply BITS clock signals directly to digital equipment An optional alarm port is also available An oscillator upgrade to an OCXO or rubidium is required to meet 6 811 6 823 and 6 824 standards Signal types T1 J1 E1 Composite Clock 1 544 2 048 Mbps Optional Alarm Connector type RI48C or DB9M EndR2. 0 100 1k 10k 100k 1M 10 MPPS Other selections are 1 PPM pulse per 60 seconds on the minute 1PP2S pulse per 2 seconds on the even second and Inverted 1 PPS falling edge on time The PPO output is provided on the Spare BNC 1 PPS Output Option Additional 1 PPS outputs can be provided on the Spare BNC A 1 PPS at RS 422 levels is available via a DB9M connector in lieu of the Spare BNC Direct Digital Synthesizer DDS Option The DDS Option provides user selectable pulse rates from 1 PPS to 10 MPPS in 1 PPS steps The DDS output is provided on the Spare BNC 10 MPPS Output Option The 10 MPPS Rate Output Option provides a fixed on time pulse rate on the Spare BNC Alarm Output Option The Alarm option provides an open collector output to indicate a major alarm condition such as loss of GPS system lock The Alarm output is commonly connected to a switch and distribution chassis and is installed on the Spare BNC or a terminal block Serial Time Output Option The Serial Time Output consists of a once per second ASCII time message to sync computer systems or equipment Format selections are Sysplex Truetime EndRun NENA and NMEA The output is at RS 232 or RS 422 levels on a DB9M connector Power Supply Options The Meridian II is equipped with an AC power supply and supports an optional DC supply For high reliability duatredundant power supplies are supported in AC AC AC DC or DC DC configurations A dual power supply confi
3. EndRun Time and Frequency Standards ay TECHNOLOGIES F0 Meridian Il Precision TimeBase GPS Synchronized Modular Time and Frequency Standard The Meridian II Precision TimeBase is a high performance modular network centric time and frequency standard that generates signals with unparalleled accuracy stability and spectral purity The second generation Meridian II combines our state of the art time and frequency technology with a powerful network timing packet engine to synchronize virtually any stand alone or network connected system The modular architecture allows you to configure Meridian Il to meet your requirements of today and add option modules in the field to meet future needs Meridian II s high reliability design and trouble free operation combined with our efficient sales and support provides the lowest total cost of ownership in the industry Meridian II supports mission critical operations in a wide range of government and commercial applications including telecommunications satellite communications digital video broadcast simulcast radio test range test and measurement calibration labs power utilities and many more GPS Timing and Frequency Control At the core of Meridian II is an EndRun GPS Receiver optimized to provide an industry best Coordinated Universal Time UTC accuracy lt 10 nanoseconds RMS and stability lt 1 part in 107 per day An advanced timing and adaptive 3order frequency control algor
4. IP e Ultra low phase noise frequnecy reference for communication systems e Master Clock with time code generator e High security and reliability Miuridian Precteion Timea it Secure Web Interface HTTPS for System Monitoring amp Firmware Upgrades Web Interface The Meridian II web interface is designed with security in mind so its use is restricted to monitoring status alarms configuration settings and installing firmware upgrades Configuration and control is conducted via the network or serial command line interface Firmware upgrades are enabled only after an authentication process In addition the web interface can be completely disabled for those who need the highest level of security The web page tabbed panels offer quick access to information about the GPS Receiver Clock 1 0 Faults NTP PTP and the Firmware Firmware upgrades are easy with the point amp click upgrade process Also a link to the resident User Manual is available on the Home page revrstat_ 2015081 1 20150812 png GPS Receiver Stats 0 Pe G9 g AGC DAC amp gt Gamer No Ratio dB j j i i i j a Number of Satellites Date UTC Charts available for GPS Oscillator NTP and CPU statistics Measurement Statistics and Charting Real time charting of GPS Oscillator NTP and CPU statistics are available via the Web Interface Measurements are continuously computed and displayed in real time wit
5. emperature stability for 0 70 C TEMP STAB OSCILLATOR STS 1 sec LPN10 5MHz AGERATE TEMP STAB TCXO standard 1x10 70 na 1x10 2 5x10 Medium Stability OCXO 3x107 95 100 3x108 4x10 High Stability OCXO 1x102 105 110 3x108 1x10 Ultra Stable OCXO 61073 110 115 3x10 5x100 Rubidium 2x10 80 na 1x10 1x10 High Stability Rubidium 2x10 80 na 5x10 1x10 See Oscillator Options datasheet for more information TIME TO LOCK lt 5 minutes typical TCXO lt 10 minutes typical OCXO Rb NETWORK 1 0 Two rear panel RJ 45 jacks 10 100 1000Base T Ethernet NETWORK PROTOCOLS Pv4 1Pv SNTP NIP v2 v3 v4 MD5 autokey authentication broadcast multicast mode SSH client server with secure copy utility SCP SNMP v1 v2c v3 with Enterprise MIB HTTPS Web Interface TIME and DAYTIME server TELNET client server FTP and DHCP clients SYSLOG PTP IEEE 1 588 2008 v2 Grandmaster 8 ns hardware time stamping Optional NETWORK SYNCHRONIZATION ACCURACY NTP Timestamp Accuracy lt 10 microseconds to UTC USNO 7 500 packets second PTP Timestamp Accuracy to Reference Clock 8 nanoseconds Santa Rosa CA USA 1 877 749 3878 or 707 573 8633 sales endruntechnologies com www endruntechnologies com 150914 Data subject to change TIMECODE CHARACTERISTICS Signal Amplitude modulated AM 3 1 ratio 1 kHz carrier 1 Vrms into 50Q User Selectable Forma
6. ess than 115 dBc and 110 dBc respectively at a 1 Hz carrier offset High Reliability and Two Year Warranty Meridian II uses EndRun s power efficient fanless design and thermal packaging with an estimated MTBF of over 20 years The system is made in America backed by a two year warranty a 60 day money back guarantee and supported by EndRun s top notch technical support team free of charge FEATURES e Modular plug and play design with field installable options e Timing accuracy lt 10 nanoseconds RMS to UTC USNO e Frequency accuracy lt 1 x 1073 e Ultra low phase noise 5 amp 10 MHz output options e Short term stability lt 6 x 1078 at second optional e Dualgigabit Ethernet ports e NTP Stratum 1 Server with through put of 7500 packets per second e EEE 1 588 PTP Grandmaster 8 ns hardware time stamping optional e Security hardened Pv4 IPv6 interface SSH HTTPS e IRIG B time code and 1 PPS output e Up to 5 option modules and 24 output signals e 1 5 amp 10 MHz sine wave output options Telecom 11 E1 output option e Vibrant display with user friendly keypad Dual AC DC optional power supplies e Free technical support and software upgrades 60 day money back guarantee BENEFITS e Time standard traceable to UTC USNO e Frequency standard with atomic clock stability e High bandwidth network time synchronization via NTP and optional IEEE 1588 P
7. guration occupies two option slots AC power supply 90 1 32 1 80 264 VAC DC power supply 12 24 48 or 125 VDC Connector type IEC 320 AC 3 position terminal block DC Modular Plug and Play Architecture Meridian Il s versatile modular design allows you to custom configure the unit to meet your application requirements The plug and play architecture supports up to 5 option modules and 23 time and frequency outputs Option modules are normally installed at the factory but most are available as field upgrades An important benefit of a modular system is that you can add modules in the field as needed to accommodate future requirements At power on boot time the Meridian II software performs a system scan detects the installed modules and configures them per your configuration settings Following is a summary of the standard Meridian II option modules For a detailed description please see the Meridian Options data sheet Digital Output Module This module adds four buffered digital signal outputs to your Meridian Il The module is popular to distribute digital pulse rates and time code Signal types 1 PPS Programmable Pulse Output PPO Time Code Direct Digital Synthesizer DDS at integer rates between 1 PPS and 10 MPPS Signal level and connector TTL BNC RS 232 DB9M or RS 422 DB9M Analog Time Code Output Module This module adds four buffered analog time code outputs to your Meridian II that match
8. h daily and weekly charts The charts are automatically archived into month and year directories that remain resident for up to ten years The GPS chart provides a valuable quick reference to assess the current and historical status of the GPS link to insure the Meridian Il is and was performing to specification The number of satellites in view carrier to noise ratio and the automatic gain control AGC are key metrics that reflect the quality and operation of the GPS receiver The Oscillator chart shows the internal chassis temperature oscillator electronic frequency control value and the offset of the receiver subsystem to the GPS reference It is useful for verifying that the unit was locked to the GPS system at a certain time The NTP statistics chart shows the NIP packets sent packet rate and the accuracy of the NTP System Time relative to UTC The CPU statistics chart shows the free memory processor load and CPU temperature Security Hardened Network Interface Extra care has been taken with Meridian II to harden it against network attacks and achieve the highest level of information assurance It was developed with the latest ver sion of the Linux operating system and security protocols The Linux distribution is based on Slackware a distribution that is famed for its security In a purpose built appliance like Meridian Il there are only a few settings that need to be made that are typically set only once in the lifetime of t
9. he product Since this is a set itand forget it box we have eliminated all extraneous protocols services in order to minimize exposure to security holes Configuration is primarily performed via the secure SSH interface although Telnet if enabled and the serial port are also available Monitor ing of system status and alarm information is easily accomplished via the secure HTTPS webpage intertace command line intertace SSH Telnet serial port or SNMP Security conscious users can further strengthen the network interface by disabling protocols e g HTTPS Telnet and restrict network access to specific hosts We designed Meridian II in such a way that it is not necessary for you to know Linux to use the product For those users who are familiar with Linux we make it easy for you to customize various aspects of the operation fo your requirements Full User Control Configuration and control is accomplished through either the front panel keypad display network or serial ports A handful of simple commands and interactive configuration wizards are provided for you to setup and control the product Online help for all of the Meridian l specific commands is available as well as the standard help manual files for all of the available Linux commands Dual Gigabit Ports Iwo independent 10 100 1000 Base T Ethernet ports are provided The ports are capable of generating 7 500 NTP packets per second with a timestamp accuracy of better than 10 m
10. icroseconds For PTP IEEE 1 588 applications you can purchase the option to run on one or both ports with a timestamp accuracy of less than 8 nanoseconds See the PTP IEEE 1 588 option datasheet for details on using Meridian II as a PTP Grandmaster ETH1 10 100 1G ETHO 10 100 1G Dual Gigabit Ports Meridian Il Rear Panel with Five Option Modules Installed Meridian II Inputs Outputs and Options Meridian II provides a complete suite of time and frequency capabilities with an exceptionally high number and variety of outputs in a standard 1U high chassis The modular plug and play design of Meridian II and wide range of option cards make it easy to tailor the unit to support your applications The base Meridian II supports several outputs via the standard CPU module that can also be expanded with options CPU Module The CPU module is standard on all Meridian II units and includes the GPS receiver antenna input RS 232 console port and three timing ports for 1 PPS AM Code and Spare for options The PPS reterence is a positive pulse with the leading edge exactly on time The AM code output provides user selectable IRIG B formats as well as NASA 36 and 2137 time codes The dual gigabit Ethernet ports support two networks The following section describes the options available on the CPU Module Programmable Pulse Output PPO Option The PPO Option provides user selectable on time pulses at decade rates from 1 PPS to 10 MPPS 1 1
11. ithm maximizes the stability of the Meridian Il outputs User Configurable Modular Design The system s modularity supports a suite of field installable plug and play option modules Up to five modules can be accommodated providing up to 23 time and frequency outputs in an efficient 1U chassis Available output signals include IRIG B time code 1 5 10 MHz ultra low phase noise telecom 11 E1 Direct Digital Synthesizer DDS from 1 10 MPPS pulse rates ASCII time messages and more Security Hardened Dual Gigabit Network Interface Meridian II introduces dual security hardened gigabit Ethernet ports that provide a high capacity Network Time Protocol NTP server and optional IEEE 1 588 Precision Time Protocol PTP Grandmaster to synchronize clients on two networks The Pv4 lPv management interface is security hardened to meet the highest Information Assurance IA requirements Reference Oscillators A variety of top quality quartz and rubidium oscillators are available to handle the full range of holdover phase noise and short term stability requirements We design and manufacture our own OCXO oscillators to achieve performance and quality not found elsewhere The proprietary design uses a 3 overtone SC cut crystal built with the highest quality components and subjected to rigorous testing to guarantee industry leading pertormance The Ultra Low Phase Noise option enables spectrally pure 5 and 10 MHz outputs with phase noise l
12. ovides frequency pulse and time code distribution products to expand Meridian outputs High Performance Frequency Distribution Chassis Frequency Distribution Chassis Pulse Distribution Chassis Time Code Distribution Chassis FDC3302 FDC3300 PDC3301 TDC3303 7 1 1 i i _ IARR i W i w ELNAN I LULL MQQQQ DE
13. ts IRIG B1 20 IEEE 1 344 IRIG B122 IRIG B123 NASA 36 or 2137 SERIAL 1 0 PORT RS 232 serial 1 0 on DB9M jack for secure local terminal access Parameters fixed at 19200 baud 8 data bits no parity 1 stop bit SYSTEM STATUS INDICATORS Sync LED Amber LED pulses to indicate lock status Alarm LED Red LED indicates a serious fault condition ALPHANUMERIC DISPLAY KEYPAD Display Brilliant 16x280 dot matrix vacuum fluorescent Keypad Enter Back Edit Right Left Up Down Help POWER 90 264 VAC 47 63 Hz 1 0A Max 120 VAC 0 54 Max 240 VAC 3 Pin IEC 320 on rear panel 2 meter cord included SIZE Chassis 1 75 H x 17 W x 10 75 Weight lt 5 pounds Antenna 2 5 H x 3 5 diameter ENVIRONMENTAL Temperature 0 to 50 C Humidity 0 to 95 non condensing COMPLIANCE CE FCC RoHS WEEE GPS ANTENNA and ACCESSORIES A GPS Antenna Kit is included with the Meridian Il consisting of an antenna 50 ft cable mounting pipe and clamps Extended cable lengths lightning arrestors in line amplifiers splitters and fiber optic links are also available MERIDIAN II OPTIONS Refer to the Meridian Options datasheet for detailed information on all options RELATED PRECISION TIMEBASE The Tycho II is similar to the Meridian II but with reduced accuracy specification of 25 ns to UTC USNO and without the front panel keypad display RELATED DISTRIBUTION PRODUCTS EndRun pr
14. un TECHNOLOGIES Meridian II Precision TimeBase Specifications GPS RECEIVER L Band 1575 42 MHz 12 Channels C A Code 15 dB minimum gain at receiver input Static and dynamic ship board operating modes Timing Receiver Autonomous Integrity Monitoring TRAIM TNC connector female on rear panel Zin 5002 5 VDC to antenna ANTENNA 40 dB gain LNA with band pass filter for out of band interference rejection Rugged all weather housing capable of operation over 40 to 85 C 50 low loss RG 59 cable Optional lengths up to 1000 with preamplifiers Mounting kit 18 long 3 4 PVC pipe with clamps TNC connector female Zout 5002 5 VDC input 1 PPS TIMING CHARACATERISTICS The following accuracy and stability specifications assume a stationary platform 4 satellite lock and antenna installation with a full view of the sky Accuracy lt 10 nanoseconds RMS to UTC USNO when locked Stability TDEV lt 10 ns q lt 10 secs oy t lt 1x1073 t 10 secs Positive TTL pulse into 50Q2 standard or RS 422 levels option UserSelectable Width 20 us 1 ms 100 ms 500 ms User Calibration 500 us 1 ns resolution See GPS UTC Timing Specifications for details LOCAL REFERENCE OSCILLATOR Several oscillator options are available to meet your short term stability at 1 second STS phase noise at 1 Hz offsets in dBc Hz LPN ageing rate year AGE RATE and t
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