The Model 2000 NETSYNC Network Time Server provides precise time information to local networks or over the Internet using the UDP Network Time Protocol. The NETSYNC operates over either a 10BASE-T or 100BASE-T The time information distributed by the NETSYNC is obtained from one of two synchronizing sources. In its standard configuration, the unit synchronizes to Universal Time (UTC) via the IRIG B Time Code format. This time code is typically obtained from a central timing system. As an option, the NETSYNC can be equipped with either an internal or STRATUM 1 time source. If neither synchronizing source is available, the NETSYNC can still operate as a stand-alone When equipped with its GPS option, the unit operates on the Civilian L Band, C/A code transmitted by the Navstar Satellites. While the Model 2000 is designed primarily for timing applications, and requires only one satellite to be in view to perform this function, it will also provide precise position information. Four satellites in view are required to With a satellite in view, the Model 2000 correlates to Coordinated Universal Time (UTC) to better than 500 nanoseconds. Synchronization to UTC via an IRIG B time code is to better than 5 microseconds. During presence of either synchronizing source, the NETSYNC disciplines its internal oscillator so as to achieve optimum correlation with UTC The standard frequency source for the NETSYNC is a temperature compensated crystal oscillator (TCXO). Optional Time synchronization of hosts is achieved via either a 10BASE-T or 100BASE-T network interface or an IRIG B time code output. Via the network interface, the NETSYNC supports interchange of time data via the NTP, Time or Daytime protocols. If the IRIG B Time Code is used to synchronize a host, the host must be equipped with an IRIG B reader; Programming of the unit is accomplished through either its front panel keypad or a serial input. An associated . · · · · · · time@datachroninc.comwww.datachroninc.com Fax: (714) 491-8213(714) 491-8500 Anaheim, CA 928051333 South Lewis Street The Model 2000 is available in both desktop and rack-mount configurations alphanumeric LCD display indicates such functions as programmed data, calculated position and satellite health. which Datachron has available in several different bus configurations. (more accurate) frequency sources are an ovenized oscillator (OCXO) and a Rubidium standard. during those periods when satellite transmissions or IRIG B are not available. determine the precise location of the receiver. unit; controlled by the front panel keypad or remote control interface. externally mounted Navstar Global Positioning System (GPS) receiver. When so equipped, the Model 2000 functions as a network interface. TIME SERVER NETSYNC NETWORK MODEL 2000 The following functions are programmable or readable via a front panel The Model 2000 accumulates time from either a temperature compensated keypad in conjunction with an alphanumeric LCD display. crystal oscillator (TCXO; standard), an internal oven controlled crystal oscillator (OCXO; optional) or a Rubidium standard (optional). When Set Cable Delay satellites are in view or IRIG B is present, the unit's frequency standard is Set Elevation Angle Mask disciplined to keep it in phase and frequency correlation to UTC. Set GMT Offset Set Network Parameters Specifications for the TCXO in a free running, undisciplined form are: Read GPS/UTC Difference -6 Read Oscillator Control Status ±1 x 10 from 0 to +50°C -9 Read Position Aging Rate:3 x 10 Read Receiver Status Read Satellite Status Specifications for the OCXO in a free running, undisciplined form are: -9 ±1 x 10 from 0 to +50°C -10 Aging Rate:1 x 10 The Model 2000 operates from a primary power source of 95 to 265 volts AC, Specifications for the Rubidium frequency standard in a free running,50 to 70 Hz and consumes less than 30 watts of power. In the event of undisciplined form are:primary power failure, internal batteries maintain keypad programmed functions and GPS Receiver acquired information for over one year. -10 ±3 x 10 from 0 to +50°C -9 Aging Rate:2 x 10 Chassis Antenna Temperature:Operating:0°C to +50°C-20°C to +95°C When IRIG B is available or at least one satellite is in view, the Model 2000 Storage:-40°C to +10-40°C to +100°C synchronizes to Universal Time in both real time and frequency. During these Humidity:0 to 95%, 0 to 100%, periods of synchronizing source availability, the unit also disciplines its without condensation internal oscillator. The result is better than 500-nanosecond correlation to UTC with satellite signals present, better than 5-microsecond correlation to IRIG B and better than 5-microsecond correlation during periods of synchronizing signal absence. The Model 2000 is designed for either desktop (bench) or rack mounting. In its desktop configuration the NETSYNC has the following dimensions: Height:1.75 inches (4.4 cm) Width:Chassis:17 inches (43.2 cm) Amplitude:justable from 0 to 6 volts peak to peakDepth:15 inches (38.1 cm), not including rear panel connectors Modulation Ratio:Adjustable from 2:1 to 6:110 pounds (4.5 kg), nominal Maximum External Load:50 ohms In the rack-mount configuration, the Model 2000 the following dimensions: Height:1.75 inches (4.4 cm) Width:Chassis:17 inches (43.2 cm) Two pulse rates, 1PPS and 10MPPS, synchronous with UTC, are provided at Front Panel:19 inches (48.3 cm) rear panel BNC connectors. Depth:15 inches (38.1 cm), not including rear panel connectors 10 pounds (4.5 kg), nominal Amplitude:Positive going pulses from a maximum 0.4 volt baseline to +4.5 volts, minimum Rise and Fall Times:15 nanoseconds Drive Capability:50 ohms Each unit is delivered with an operation and maintenance manual which includes a complete description of the unit’s theory of operation along with all assembly and schematic drawings. The NETSYNC distributes time via either a 10BASE-T or 100BASE-T network interface. The connector is an RJ45. The interface supports the SNMP Network Management Protocol, the DIX Ethernet and IEEE 802.3/802.2 Frame formats and Network Time (NTPu1/NTPu2), Time or Daytime protocols. All parameters programmable through the front panel keypad are also programmable remotely via an RS232 interface or the Network Interface. If the Network Interface is used, the NETSYNC supports the TELNET and SNMP protocols. Firmware resident in Flash memory is also updateable via the Remote Control interface. Remote Control Network Interface Documentation Weight: Pulse Rates Weight: Ad IRIG B Serial Time Code Outputs Physical Characteristics 0°C Synchronization Environmental Characteristics per year Stability: per day Stability: Power Requirements per day Stability: Frequency Standard Programmable Functions SPECIFICATIONS