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Product Information

Microsemi SyncServer S650 combines the best of time and frequency instrumentation with unparallelled flexibility and powerful network/security-based features.

The base timing I/O module with 8 BNC connectors comes standard with the most popular timing I/O signals (IRIG B, 10 MHz, 1 PPS, etc). When more flexibility is required, the unique Microsemi FlexPort™ Technology option enables 6 of the BNCs to output any supported signal (time codes, sine waves, programmable rates, and so on), all configurable in real time via the secure web interface. This flexible BNC-by-BNC configuration makes efficient and cost-effective use of the 1U space available. Similar functionality is applied to the 2 input BNCs as well. Unlike legacy modules with fixed count BNCs outputting fixed signal types per module, with FlexPort™ technology you can have up to 12 BNCs output in any combination of supported signal types.

Robust Timing and Design

The 72-channel GNSS receiver coupled with Microsemi's patented Active Thermal Compensation Technology provides excellent accuracy of <15 ns RMS to UTC (USNO). Backstop this with a durable hardware design subjected to MIL-STD-810G testing, high-reliability components extending the operating temperature range to a very wide -20°C to +65°C, and a dual power supply option. Further, upgrading to a high performance oscillator, such as a Rubidium atomic clock, keeps the S650 accurate for long periods in the event of a GNSS service disruption.

Secure Networking

Security is an inherent part of the SyncServer S650. In addition to many security features and protocols, unsecure access protocols are deliberately omitted while remaining services can be disabled.

The four standard GbE ports accommodate more than 10,000 NTP requests per second using hardware time stamping and compensation. All network traffic to the S650 CPU is bandwidth-limited for protection against denial-of-service (DoS) attacks. For more secure NTP operations, enable the optional Security-Hardened NTP Reflector™ with line speed, 100% hardware-based NTP packet processing*. The Reflector is also a CPU-protecting firewall, bandwidth limiting non-NTP traffic to the CPU. It is also equipped with DoS detection, notification, and protection against abnormally high network traffic.

Leverage Built-In Hardware

The SyncServer S650 includes additional built-in hardware features that are enabled through software license keys, such as the Security-Hardened NTP Reflector™. Anticipated future software enabled hardware options are GbE PTP operations and GLONASS support.

The SyncServer S650, the future of time and frequency, today.

Four GbE Ports for Performance, Flexibility, and Security

The S650 has four dedicated and isolated GbE Ethernet ports, each equipped with NTP hardware time stamping. These are connected to a very high-speed microprocessor with microsecond accurate time stamps to assure high-bandwidth NTP performance. This more than meets the need of servicing 10,000 NTP requests per second.

Multiple ports provide the flexibility to adapt to different network topologies as networks grow and change. An S650 can be the single time-source to synchronize clients on different subnets and physical networks. Since each port is independent, it can appear as though there are four clocks available, even though there is only a single time reference.

NTP can be served on all 4 ports. The highly secure web-based management interface is only available on port 1 so that administrators may choose to keep that IP address private and secure. Unique access control lists per port can govern server response to client requests for time.

Intuitive, Secure and Easy to Use Web Interface

The modern web interface is the primary control interface of the S650. Once the keypad and display are used to bring the unit online, complete status and control functions are easily found via the well organized left side-expanding/collapsing navigation menu.

Standard Management Access Security

All of the expected network management protocols are standard in the S650. These include mandatory password access, HTTPS/SSL only (using the high encryption cipher suite), SSH, access control lists, service termination, SNMPv2/v3, and NTP MD5 authentication. All traffic to the S650 CPU is bandwidth-limited for protection against DoS attacks. The local keypad on the server can be password-protected to prevent tampering.

Security-Hardening Option

The SyncServer S650 can be seriously hardened from both an NTP perspective and an authentication perspective through the Security Protocol License Option, which includes the Security-Hardened NTP Reflector.

Operational Hardening - via the 120,000 NTP packet per second NTP Reflector™ with 100% hardware based NTP packet processing also works with a CPU-protecting firewall by bandwidth limiting all non-NTP traffic. The Reflector also monitors packet flow for DoS detection and reporting, yet remains impervious to the level of network traffic as it operates at line speed.

Authentication Hardening - is available for NTP client/server authentication through the NTP Autokey function or user access authentication via TACACS+, RADIUS and LDAP. (See the SyncServer Options datasheet for more detail on the Security Protocol License Option).

Unprecedented NTP Accuracy

The Stratum 1 level S650 derives nanosecond accurate time directly from the atomic clocks aboard the GNSS satellites. By using an integrated, 72-channel GNSS receiver, every visible satellite can be tracked and used to maintain accurate and reliable time. Even in urban canyon environments where direct satellite visibility can be limited, manually inputting the position can be sufficient to acquire accurate time from as few as one intermittent satellite.

Ultra High Performance NTP

The S650 can effortlessly support hundreds of thousands of network clients while maintaining microsecond caliber NTP timestamp accuracy. NTP request throughput rates exceed 10,000 requests/ second while maintaining NTP timestamp accuracy. If the Security License option is enabled, the NTP Reflector™ can process over 120,000 NTP requests per second with 15 nanosecond caliber time stamp accuracy with the added benefit of security hardening the network port. This can easily translate into sub-millisecond typical NTP client synchronization accuracy on a LAN.

More Timing I/O Standard

The Base S650 can host two modules. The Timing I/O module is equipped with 8 BNC connectors for timing signal input and output. The standard configuration offers a broad yet fixed selection of signal I/O including IRIG B, 10 MHz, 1 PPS, and so on.

FlexPort™, the Ultimate in Timing Flexibility

Microsemi’s unique FlexPort™ Technology efficiently and cost-effectively adds innovative “any signal, any connector” technology, eliminating the wasted space inherent with legacy style fixed signal modules/BNCs.

The FlexPort™ Technology option enables the 6 output BNCs (J3-J8) to output any supported signal (time codes, sine waves, programmable rates, and so on.) all configurable in real time through the secure web interface. The 2 input BNCs (J1-J2) can support a wide variety of input signal types. (See the S650 Option datasheet for full details).

This level of timing signal flexibility is unprecedented and can even eliminate the need for additional signal distribution chassis as there is no degradation in the precise quality of the coherent signals.

Serial Time Outputs

The dedicated Data/Timing port is provided to output NMEA-0183 or NENA PSAP strings. If NENA is selected, the serial Console port also supports the two-way timing aspects of the standard. In addition, the F8 and F9 Microsemi legacy time strings are also available.

Oscillator Upgrades Improve Holdover Accuracy and Save Valuable Time

The standard S650 is equipped with a crystal oscillator that keeps the S650 accurate to nanoseconds when tracking GNSS. However, if GNSS connectivity is lost, thereby placing the server in holdover, the oscillator will begin to drift impacting timing accuracy. Upgrading the oscillator improves the holdover accuracy significantly. For example, consider the drift rates below for the standard oscillator compared to the OCXO and Rubidium upgrades:

Oscillator Holdover Drift (1st 24 hours)

  • Standard: 400 microseconds
  • OCXO: 25 microseconds
  • Rubidium: <1 microsecond

The value of the upgraded oscillator is that if the GNSS signal is lost the S650 can continue to provide very accurate time and frequency. This provides personnel time to correct the problem with only gradual degradation or disruption in time synchronization accuracy.