The TCG 02-G is a highly accurate, fully featured GPS and GLONASS (GNSS) clock. Offering multiple oscillator options, Time Code and Frequency outputs, it fits virtually any timing application. With enhanced cyber security features that support NERC CIP requirements, the TCG 02-G is designed for use in modern day smart grid / smart substations, electricity distribution, transmission, and generation protection. In addition industrial application systems and traditional substations are equally provided for. This master clock synchronizes multiple IEDs (Intelligent Electronic Devices) within a network, including protection relays, synchrophasors, event recording and remote telemetry units to enable accurate time stamping. The TCG 02-G is available as a base unit or with one of three expansion module options.

Key Features:

  • Ruggedized
  • Independently isolated outputs
  • Isolated single or dual power supplies
  • High output power line drivers
  • High noise immunity due to balanced pair distribution
  • UTC and LST with user defined DST options
  • Master/Slave function
  • 9 outputs
  • Supports elements of TCP/IP for remote configuration
  • Encryption and Password protection
  • OCXO option
  • Atomic option

Input/Output Signals:

  • DC IRIG-B (Unmodulated, DCLS)
  • AM IRIG-B (Modulated)
  • Supports C37.118.1
  • Modified Manchester
  • Serial Strings
  • TTL, RS232, RS422/ RS485, HV MOSFET, fiber
  • User defined pulses
  • DCF77
  • Frequency outputs
  • T1/E1/J1 support
  • Event Recording
  • NTP/SNTP v3, v4 server operation, and basic SNTP client protocol for testing purposes (included)
  • PTP (1588v2) Default profile, Full Power profile (C37.238), Telecom slave profile (ITU G.8265.1), Telecom grandmaster & slave profile (ITU G.8275.1)

Base Model
Expansion Module 2
Expansion Module 3


Design: 1U rack-mount bracket designed for 19 Inch cabinets. IP40 (Ingress Protection rating)

Measurements: (W) 430 mm x (D) 270 mm x (H) 45 mm

2.0 Kg
2.0 Kg
2.0 Kg

Display: 2-line x 16 character FSTN backlit display

GNSS Receiver

L1, C/ A code, 32 Channel Parallel-tracking receiver Frequency: 1598 MHz Sensitivity: Acquisition -148 dBm Tracking -160 dBm

Oscillator – TCXO

Holdover characteristics operating at 25°C: – TCXO 1PPS drifts 0.55 ms over a 24 hour period – Drift rate: 7 ppb per second

Inputs & Outputs

Two Independent programmable Outputs, either: – TTL 0-5 V, 150 mA (2 Pin or BNC) – RS422 +/- 5V, 50 loads (2 Pin) – HV MOSFET 300V 1A (2 Pin) – Fiber TX(62.5/125um) Accuracy: <100 ns to UTC

Serial Port: RS232: +/- 9 V, 15 mA Connector: DB9 – Serial String – Pulse output Serial Message Accuracy: <1 bit time (Baud rate dependent) IRIG-B RS232 Accuracy: <1.5 μs to UTC

AM IRIG-B Output: Voltage: 9 Vpp Impedance: 120 ohm Connector: BNC Accuracy: <2 μs to UTC

Power supply alarms Form A contacts (2 Pin)

Antenna alarm: Form A contacts (2 Pin)

Sync relay: Form A contacts (2 Pin)

Network Time Server option

Ethernet: Connector: RJ45 UTP Interface: 10/100 Mbps

<100 ns to UTC
<100 ns to UTC
<100 ns to UTC

Protocols supported: ARP, UDP, ICMP, TFTP, DHCP, SNMP, and BOOTP

NTP/SNTP Support

Specifications: Stratum 1 NTP/ SNTP Time Server (v1 to v4)

PTP (IEEE1588 v2) Support

Specifications: – Full power profile (C37.238) – GrandMaster (GPS) or ordinary clock functions (determined via BMC algorithm) – 1-step/ 2-step process – Layer 2 or Layer 3 mapping – Peer to Peer and End to End delay support – Multicast operation – Telecom Slave profile (ITU G.8265.1) – Telecom Grandmaster & Slave profile (ITU G.8275.1) – Accuracy <100 ns to UTC

Expansion Options

Two Inputs Support: – DC IRIG-B slave function – Event recording
✔ (2 Pin)

Programmable Output, either: – TTL 0 – 5 V, 75 mA (BNC) – Fiber TX (62.5/125 µm) – Accuracy: <100 ns to UTC

Fixed IRIG-B Outputs:
Four IRIG-B outputs outputs, choose between: – IRIG-B TTL/AM IRIG-B (BNC) – Fiber TX(62.5/125 µm) – Accuracy TTL/ Fiber: <200 ns to UTC @ 25 mA – Accuracy AM IRIG-B: <2 µs to UTC
Three IRIG-B outputs outputs, choose between: – IRIG-B TTL/AM IRIG-B (BNC) – Fiber TX(62.5/125 µm) – Accuracy TTL/ Fiber: <200 ns to UTC @ 25 mA – Accuracy AM IRIG-B: <2 µs to UTC

Two Frequency Outputs: T1/E1/10M (BNC) outputs: – T1, E1 and 10M modes – Switchable sine/square wave formats

T1/E1/J1 Outputs: Two T1/E1/J1 RJ48 outputs. Modes are software configerable

Additional Network Time Server: – RJ45 connector – 10/100 Mbps – Accuracy: <100 ns – NTP/SNTP/PTP – Protocols supported: ARP, ICMP, TFTP, DHCP, SNMP and BOOTP

OCXO Option

1 PPS Precision:
<±50 ns to UTC
<±50 ns to UTC
<±50 ns to UTC

1 PPS Holdover Characteristics: <±5 μs/8 hours (48-hours Aging) <±10 μs/18 hours (48-hours Aging) <±10 μs/24 hours (7-days Aging)

10 MHz Stability:
<±1.0×10^(-9) Pk to Pk

10 MHz Precision: <±1.0×10^(-12) Average per 24 hours <±1.0×10^(-10) Root Allan Variance (tau =1 second)

10 MHz Holdover characteristics:
<±1.0×10^(-9) 24 hours Common to 48-hours aging and 7-days aging

Atomic Option

Please contact Tekron for full specifications.

Environmental & Electrical

Power supply options: Primary: – Med(20-75Vdc) – High(90-300Vdc) – AC(85-265Vac)

Power Drain:
12 W max
12 W max
12 W max

Operating Temperature:
-10°C to +65°C
-10°C to +65°C
-10°C to +65°C

To 95% non-condensing
To 95% non-condensing
To 95% non-condensing


Outputs to base unit:
2.5 kV
2.5 kV
2.5 kV

Power supply to I/O:
3.5 kV
3.5 kV
3.5 kV

Between I/O:
5 kV
5 kV
5 kV


Platform: Windows based configuration tool

Timing & Synchronization: – Worldwide daylight savings and local time configuration. – Adjustable hold-over times – Antenna cable delay compensation

Programmable Outputs: – IRIG-B (B00x / B22x) – C37.118.1 and AFNOR S87-500 extensions – DCF77 time code – User defined pulses

Serial Strings: NMEA-0183 ZDA NMEA-0183 RMC IRIG J-17 Seven plug and play string formats


The antenna lightning protection kit affords additional protection through the use of an impulse suppressor installed in the antenna lead-in coax cable. In the event of a lightning-derived high voltage surge occurring on the coaxial cable, the impulse suppressor activates, short-circuiting the cable directly to the protection ground. Kit contents (all components required to install lightning protection are included): – Impulse Suppressor – Self-amalgamating tape – 2 x N-type Male crimp style connectors to match antenna cable – Crimp Tool to match the above connectors (RG59).


The antenna mounting bracket is an adjustable 500mm powder-coated steel bracket for securely mounting the timing optimized antenna option.


High performance CNT-240 cable, factory-fitted with a TNC-type male connector at one end, and a SMA male connector at the other. Cables are available in standard 15, 30, or 60 meter options. Contact our sales team if you require other custom lengths.


Simplifies the connection of an IED with a BNC connector to a shielded twisted pair IRIG-B wiring loom.


Dual GPS/GLONASS antenna radome that boasts exceptional out-of-band rejection, specifically designed for industrial/static timing environments. The antenna includes a pipe-mounting plinth that is designed to fit the antenna mounting bracket accessory.