GPS NTP TIME SERVER FOR NETWORK TIME SYNCHRONIZATION

GPS TIME SERVER
× GPS SYNCHRONIZED CLOCK SYSTEMS

SYNTIME GPS NTP Time Synchronization Server

GPS Time Server (SYNTIME) is capable for the time synchronization requirements in various industries like power, process, IT, telecommunications etc. It generates wide range of time code and pulse signals via different output ports like 1PPS, IRIG-B TTL/AM, NTP, Serial (RS232/RS485), PTP, Fiber ports.

GPS Time Server (SYNTIME) has redundant and non-redundant options for Power supply and GPS receiver functionality. SYNTIME has a 16 x 2 LCD display for viewing of time parameters, status of GPS receiver parameters, discrete LEDs provide at-a-glance status and health information. The GPS receiver has built-in RT on board backed up with battery to maintain time during power loss and instant recovery on power resumption.

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Network Time Protocol (NTP)

GPS Time Server (SYNTIME) is a Stratum 1 GPS-based full featured NTP Server for synchronizing all types of NTP and SNTP clients in LAN. NTP v2/v3 and v4 with all modes (Unicast/Broadcast/Multicast) and NTP related all necessary MD5 authentication mechanisms are provided in this device.

Networking Protocols

SYNTIME supports a full suite of networking protocols for its own administration and configuration management. These are IPv4, TCP, HTTP, SNMP, SSH, SCP, SYSLOG.

Security Features

SYNTIME provides secured access for configuration and management via HTTP. It supports full featured SNMP protocol with MD5 mechanisms. Users can configure through Ethernet port with username & password.

Key Benefits

01

Reliable GPS/GNSS-Referenced Timing

Maintains synchronized time using an independent GNSS-based reference source.

02

Flexible Time Synchronization

Supports multiple time distribution protocols and outputs to integrate with different network and industrial systems.

03

Supports Critical Infrastructure

Designed for applications across power utilities, aviation, telecom, data centers, transportation, and IT infrastructure.

04

GNSS Loss Protection

High-stability oscillator options can provide improved holdover performance when the external GNSS reference is temporarily unavailable.

05

Enhanced System Reliability

Helps maintain consistent timing across distributed systems, reducing time-related discrepancies between devices.

How Does a GPS NTP Server Work?

GPS NTP Server Architecture Diagram

Application

Features

Specification

  • Parallel tracking of 22 satellites
  • GPS-based time server available in Redundant & Non-Redundant options
  • Ethernet ports
  • NTPv2/v3 and NTPv4 with MD5 authentication & symmetric and autokey management
  • Secured web server
  • IPv4, SNMP, SSH, SCP, HTTP, SYSLOG, FTP, networking protocols
  • Remote alarm notifications via SNMP, SYSLOG
  • Universal time-zone and DST settings
  • Supports synchronization of IEC61850 compliant devices via NTP/SNTP protocol
  • Universal (AC/DC) power supply
  • Highly accurate OCXO type crystal
  • Programmable Pulse Outputs
  • Solid state relays for programmable events
  • NTP Client Synchronization software
  • Diagnostic relay outputs

Supporting Time Protocols

  • NMEA [GPRMC, GPZDA, GPGGA], NGTS, T-FORMAT
  • IRIG-B Modulated
  • IRIG-B TTL
  • PFC
  • PTPv2
  • SNTP/NTP
  • SNTP / NTP – FO &  PTP -FO
  • Pulse-FO and IRIG-B  TTL-FO
  • RS485(IRIG-B PWM)
  •  10MHz

Power Utility

  • Substation Automation
  • SCADA Event Timestamping
  • Synchrophasor / PMU Synchronization
  • Protection & Control
  • Fault Recorders
  • IEC 61850 Network Synchronization

Aviation

  • Air Traffic Control (ATC)
  • Flight Information Display Systems (FIDS)
  • Radar & Surveillance Systems
  • Airport Network Synchronization
  • Navigation Systems
  • Security & Access Systems

Data Center

  • Server & Network Synchronization
  • NTP/PTP Infrastructure
  • Distributed Database Synchronization
  • Transaction Timestamping
  • Network Monitoring
  • Log & Event Correlation
  • IT Infrastructure Timing

Fintech

  • Financial Transaction Timestamping
  • Trading & Exchange Systems
  • Audit Trails
  • Transaction Sequencing
  • Distributed Financial Systems
  • Compliance & Record Keeping
  • High-Frequency Trading Infrastructure

Transportation

  • Railway Signalling
  • Railway Master Clock Systems
  • Traffic Management Systems
  • Fleet & Transit Systems
  • Passenger Information Systems
  • Intelligent Transportation Systems
  • Event Timestamping

Telecom

  • 5G/LTE Network Synchronization
  • Base Station Synchronization
  • Mobile Network Timing
  • Network Switching & Routing
  • PTP/NTP Distribution
  • Telecom Core Infrastructure
  • Network Monitoring

IT Infrastructure

  • Enterprise Network Synchronization
  • Servers & Virtual Machines
  • Authentication Systems
  • Security Logs
  • SIEM/Event Correlation
  • Cloud Infrastructure
  • Application & Database Synchronization
GPS Receiver
Timing Accuracy < 15 ns with GPS Receiver
Positioning Accuracy < 10m
Input Frequency 1176.45MHz / 1575.42 / 1602MHz / L1 / L5 C/A code
Tracking 22 parallel channels(Navic / GPS / Glonass)
Acquisition time

Hot Start < 5 sec

Warm Start < 35 sec

Cold Start < 35 sec
Antenna
Type Active L1/L5 (NAVIC / GPS / GLONASS), 28 dB gain
Antenna Cable type RG 6 / RG 11
Operating Temperature -40 to +85°C
Coverage 360 Degree
Ingress Protection IP67
Weight 150 g
Time Signal Output
Output
PPS output

1 Pulse per second

TTL into 250 Ω

500 ms Pulse Width
Frquency output 10MHz
IRIG-B Modulated

IRIG-B

IRIG B122 (Local time output)

IEEE 1344 (Local time output)

AFNOR NFS (Local time output)

IEEE C37.118 (UTC time output)

1 KHz AM Signal

Modulation Ratio : 3:1

5.5 Vp-p, into 100Ω ±10%
IRIG-B TTL

IRIG-B

IRIG B002 (Local time output)

IEEE 1344 (Local time output)

AFNOR NFS (Local time output)

IEEE C37.118 (UTC time output)

5.5 Vp-p, into 100Ω ±10%

TTL into 50Ω

100Hz PWM Signal
NTP(LAN Interface)

: Protocol Support : NTP V3, SNTP

: Network Protocol : TCP, UDP, IPv4

: Mode : Server

: Interface 1 x 10/100/1000 Mbps

Serial

Configurable Serial Frames (NMEA / NGTS / T-format)

NMEA frames – GPRMC / GPZDA / GPGGA

Output Status LED

RS232 & RS485

Fix configuration : 9600-8-N-1
PTP

Profile Supported: IEEE 1588-2008, IEEE C37.238-2011, C37.238-2017, IEC 61850-9-3

: Delay Mechanism – E2E / P2P

: PTP Modes 1 Step/2 Step mode

Interface 1 x 10/100 Mbps
PRP

PRP will support NTP, SNTP and PTP

Optical Ports For TTL Signals

: Transmission : Simplex

: Fiber Size : 62.5/125 μm

: Wavelength : 820 nm

: Distance : 1500 meters
Optical Ports For Ethernet

 Ethernet(NTP/PTP)

: Transmission : Simplex

: Fiber Size : 62.5/125 μm

: Wavelength  : 1310/1550 meters

: Range : 2km for Multimode and 20-120km for

Singlemode
Pulse outputs : 4 x PFC(250 V/0.2 A) (PPS, PP5S, PPM, PPQH, PPHH, PPH, PPD)
Interface and Configuration
Display

2 x 16 Character backlit LCD Display

Local / UTC Time and Date

Julian days

Position latitude, longitude
Displayed data Status of the GPS receiver
Status LEDs Power, 1PPS, GPS Locked & NTP
Configuration Methods Web server HTTP
Network Protocols

IPv4, TCP

NTP v2[RFC 1119], v3[RFC 1305] and v4[RFC 5905] with Unicast, Broadcast / Multicast Modes

SNMP v1[RFC 1157], v2[RFC 1901-1908] and v3[RFC 3411-3418] with Enterprise MIB file

SNMP v1, v2 and v3 compatible Traps with two configurable SNMP Trap Managers

SYSLOG for internal and remote Alarm logging

SSH v1, v2, Telnet for remote configuration

PTPv2 - IEEE 1588 Grandmaster Clock (Multi-Profile support, incl. IEEE 1588-2008, IEEE C37.238-2011, C37.238-2017, IEC 61850-9-3)

Webserver through HTTP, Browser based Configuration & monitoring

Network Security Features

Configurable MD5 based encrypted password user access to SSH, Telnet and Webserver access

NTP v3,v4 MD5 Authentication with Symmetric and Autokey Management

SNMP v3 – SHA/MD5 Authentication

SNMP v3 with no-auth / auth / priv security feature
Description
ETH -CONF

IPv4, NTP, SNMP, Webserver, SSH.

Network Interface :RJ45, Auto-negotiation

Power Supply
Standard 90 – 260 V AC / 90- 370 V DC, 35W
Option-1 18 – 36 V DC, 30W
Option-2 36 – 75 V DC, 30W
Mechanical
Mounting 1U, 19” Rack Mount
Dimensions(mm) 44.5(H) x 484(W) x 220(D)
Ingress protection IP20 enclosure
Environmental
Operating temperature 0 to +55°C
Storage temperature -20 to +80°C
Humidity 20-95 % RH Non Condensing
Modular Architecture
User Selectable Modules for Slot-1 to Slot -3
M1 10/100 Mbps, NTP, RJ45 X 2
M2A 10/100 Mbps, NTP, RJ45 X 1 + FO X 1 (Single Mode-ST)
M2B 10/100 Mbps, NTP, RJ45 X 1 + FO X 1 (Multi Mode-ST)
M3A 10/100 Mbps, NTP with SNMP, RJ45 X 2
M3B 10/100 Mbps, NTP with SNMP + PRP, RJ45 X 1
M3C 10/100 Mbps, PTP with SNMP, RJ45 X 2
M3D 10/100 Mbps, PTP with SNMP + PRP, RJ45 X 1
M4A 10/100 Mbps, NTP with SNMP, RJ45 X 1, FO X 1, (Single Mode-ST)
M4B 10/100 Mbps, NTP with SNMP, RJ45 X 1, FO X 1, (Multi Mode-ST)
M5A 10/100 Mbps, PTP with SNMP, RJ45 X 1, FO X 1, (Single Mode-ST)
M5B 10/100 Mbps, PTP with SNMP, RJ45 X1, FO X 1, (Multi Mode-ST)
M6A IRIG-B, AM X 2
M6B IRIG-B, AM X 1 + PWM X 1
M6C IRIG-B, PWM X 2
M7A Pulse FO, Multi-mode IRIG-B PWM X 2
M7B Pulse FO, Multi-mode IRIG-B PWM X 1 + PPS X 1
M7C Pulse FO, Multi-mode IRIG-B PPS X 2
M8A Pulse FO, Single mode IRIG-B PWM X 1
M8B Pulse FO, Single mode IRIG-B PPS X 1
M9 RS485(IRIG-B PWM) X2
M10 10/100 Mbps NTP, RJ45 X 1, 10/100/1000 Mbps, NTP, RJ45 X 1
Standard GPS Antenna cable length
20 meters – RG6
50 meters – RG6
100 meters – RG11

Testimonial

“

The service has been very satisfactory, with good technical support and timely responses to changes. The technology updates and overall service delivery have been consistent and reliable. Overall, the service offers good value and meets our expectations.

Kathirvel

Sr. Manager • Sifang Automation India Pvt Ltd.

“

SANDS NTP Server has delivered excellent performance in maintaining accurate and reliable time synchronization across our network. Its consistent operation and technology updates have helped us maintain smooth and synchronized network infrastructure.

Aditya Pandey

Sr lead engineer • Rohde & Schwarz Delhi

Our Customers

FAQ

A GPS NTP server is a network time server that uses GPS/GNSS signals as its precise external time reference and distributes synchronized time to connected devices over a network using the Network Time Protocol (NTP). It provides a reliable reference time for servers, computers, network devices, and industrial systems.
A Stratum 1 NTP server is an NTP server that obtains its reference time directly from a primary time source such as GPS/GNSS. It acts as an authoritative time source for network devices and servers, providing accurate and synchronized time across the network.
The GPS/GNSS receiver receives precise time information from satellites and provides it to the time server as a reference. The server uses this reference to maintain accurate system time and distributes it to connected devices through NTP. This allows networked systems to synchronize their clocks to a common time source.
NTP (Network Time Protocol) is designed for precise and robust time synchronization across IP networks, while SNTP (Simple Network Time Protocol) is a simplified implementation of NTP. SNTP provides basic time synchronization with lower complexity, whereas NTP offers more sophisticated synchronization and clock-discipline mechanisms.
The accuracy depends on the GNSS receiver, oscillator, antenna installation, network conditions, and the specific time server architecture. A GPS-based Stratum 1 time server can maintain a highly accurate reference to GNSS time and distribute synchronized time to network devices. For applications requiring precise timing, options such as high-stability TCXO, OCXO, or Rubidium oscillators can provide enhanced holdover performance.
Yes. A GPS NTP server can distribute synchronized time to multiple devices over an IP network. Servers, computers, switches, routers, SCADA systems, industrial controllers, and other NTP/SNTP-enabled devices can synchronize their internal clocks with the central time server.

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