6 Specifications
6.1 Time Server Features and Specifications
• Receive time information from GPS satellites anywhere on the surface of the earth
• RFC1119/1305 NTP Protocol to serve time (Network Time Protocol)
• RFC1769/2030/4330 SNTP Protocol (Simple Network Time Protocol)
• IEEE 1588:2008 Version 2 PTP protocol
• Server Time Level: Stratum 1
• NTP Server Time Precision: better than 1mS + network jitter.
• PTP Server Time Precision: better than 3uS + network jitter.
• All networked computing platforms support time synchronization either natively or with add on
drivers including: Windows, Macintosh, and Linux. Many other devices can access the device
as well including VoIP phones and digital clocks.
• 10M/100M adaptive network interface
• Unit is capable of serving 750+ NTP synchronizations per second. That provides support for
over 600,000+ devices updating every 15 minutes on the network.
• Active Patch GPS antenna included. Magnetic base.
• Compliant with FCC Part 15B, and CE marked for radiated emissions and is a lead free product.
• Power Requirements: 5W at startup and 2.5W continuous at 12V DC
• Environmental Requirements: Commercial temperature range, 0-70C, 95% humidity non-
condensing. Altitude -304m to 18,000m.
• Networking: Static or DHCP IPv4 addressing. Standard browser interface for setup.
• Indications: Power, GPS Signal Lock, and 1PPS indications
• Rear Connections: Power, Cat5 Ethernet, Serial (status information only, 115200,n81), and
GPS antenna via SMA connection. Supports +3.3V and 5V active GPS antennas with internal
jumper setting. TM2500B has BNC output connection.
• Serial port outputs data every two seconds, including the following items:
- IP, Time, GPS fix, Time known, ptpClockClass, ptpClockAccuracy, ntpStratum.
• Mechanical Dimensions: 5 in. x 4.2 in. x 1.3in.
6.2 GPS Module Specifications
• Based on MediaTek MT3339 Chipset
• 22 channel low power receiver module
• Sensitivity: -165dBm
Installation and Operations Manual | Page 20
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