Field Time Sync Generator Model TB-1

Features

• Fields of application

  

  Measuring synchronization delays in the field

  No need for a heavy, unwieldy atomic clock to measure the synchronization delay of mobile base stations.
  The quick start-up of the TB-1 dramatically increases the efficiency of field operations.

  

  Reliable reference for frequency measurement

  The frequency output of TB-1 is as stable as an atomic oscillator. It can be used as a reference signal for frequency checks of rubidium oscillators used in broadcasting stations and for field reception surveys.

  

  Experiment on moving vehicle

  TB-1 can be used for experiment in moving vehicles as it has a small form factor and is easy to handle. TB-1 is suitable for frequency and delay measurements in V2X system development, as well as for synchronizing multiple sensors with UTC.

  

  Alternative for stationary equipment

  TB-1 can be used for a wide range of applications, not only in the field , but also in indoor facilities. As long as the antenna receives GNSS signals (ex. at a window), TB-1 provides a 1 second pulse (1 PPS) and a 10 MHz reference frequency, both synchronized with UTC.

• Two types of reference signal output

  1 PPS (synchronized to UTC)
  10 MHz (coherent and synchronized with 1 PPS)

• Ultra-precise time

  Just by receiving GNSS satellite signals, TB-1 can provide a timing signal (1 PPS) in the nanosecond order and a reference frequency (10 MHz) as precise as an atomic oscillator.

• Quick start

  TB-1 starts providing a 1 PPS synchronized with UTC and a coherent 10 MHz reference frequency in about 5 minutes after power on. (In normal mode)

• Reliable in various environments (urban canyons, in vicinities of tall buildings, indoors near windows, etc.)

  TB-1 internal GNSS receiver includes countermeasures against GNSS vulnerabilities such as multipath, jamming, spoofing and GNSS signal loss.

  White Paper: Countermeasure for GNSS receiver failure

  

  1.Multipath mitigation

  TB-1 internal GNSS receiver includes the Dynamic Satellite Selection™ algorithm* which minimizes deterioration of time synchronization performance by choosing only the high quality satellite signals.
  * A new satellite signal selection algorithm developed by NTT.
  
  
  

  2.Active anti-jamming (interference wave)

  If TB-1 internal GNSS receiver is subjected to jamming signals, it can mitigate their negative impact and prevent a GNSS signal loss or failure. This anti-jamming function can also help investigate the sources of jamming signals by reporting frequencies and power levels of the jamming signals.

  3.Active anti-spoofing

  Malicious spoofing signals intentionally mislead the position and timing calculation of GNSS receivers. Therefore TB-1 internal GNSS receiver is designed to detect and cancel such effects and protect the system from spoofing attack.

  4.Holdover - Mitigation against loss of GNSS signals

  In case of a GNSS signal reception interruption, due to external factors such as for example an antenna failure, TB-1 will continue to provide an accurate and stable 1PPS and 10MHz reference frequency for a holdover period of time.
  ・In case TB-1 GNSS receiver position calculation is interrupted, it will predict and correct the oscillator performance through its exclusive disciplining technology.
  ・TB-1 presents an excellent cost performance as a replacement for atomic oscillators.

• Windows® / Android™ Monitor Software

  TB-1 GNSS satellite reception can be checked and TB-1 settings can be managed on monitor software.

  Click here for the Monitor Software

  • FURUNO GNSS Conductor T2 for Windows®
  • TB-1 App for Android™

• Power supply via USB

  TB-1 has two Type-C connectors, one for data communication (also available for power supply) and one for power supply only.

Specifications

General

On-board Oscillator

OCXO

GNSS Reception Capability

GPS L1C/A, GLONASS L1OF, Galileo E1B/E1C, QZSS L1C/A, QZSS L1S, SBAS L1C/A

Time to Lock

< 5 min

10MHz Output (Lock State)

Allan variance: < 5 × 10^-11 (@ τ = 1 s)
Long term stability (24h average): < 1 × 10^-12
Output level: 6.5 dBm sine-wave
Impedance: 50 Ω

1PPS Output (Lock State)

Accuracy: < 40 ns
Stability: < 4.5 ns （1σ）, Compliant with PRTC-A / PRTC-B
Output Level: 3.3 V (LVCMOS)
UTC Synchronization Edge: Rising (default. Software configurable)

1PPS Output (Holdover)

Long term: < ±1.5 μs/2h, < ±50 μs/24h
Short term: < ±3 μs/1h (typ)

Power supply

Port: DATA USB
Power, Electric current: DC 5 V, 2 A
Antenna terminal with superimposed DC voltage: 3.3 V

Operating Temperature

-40 °C to 85 °C

Operating humidity

Max 85 %RH

Outer Size

141.0 mm × 36.0 mm × 60.0 mm (Excluding the protruding SMA connectors)

Weight

255 g approx. (TB-1 unit only)

Interfaces

GNSS Antenna: SMA
10 MHz: SMA
1 PPS: SMA
POWER USB: USB Type-C
DATA USB: USB Type-C

Communication interface

Port: DATA USB
Communication speed: Full Speed
Control and monitoring: Android™ app

LED

LOCK, ALARM, POWER

Accessories

Accessories (included in the carrying case):
TB-1 unit, active multi-GNSS patch antenna (5 m cable), USB cable (2 pcs.), and manual
*Please prepare your own AC adapter or mobile battery.

Interconnection Diagram

Confirmed list of compatible instruments (Examples)

Video of how to use TB-1

Case study

Field test of 6G mobile base stations and mobile terminals

Source: Niigata University

"TB-1" to time synchronize devices (mobile base stations and mobile terminals) at two remote locations

Outdoor Time Synchronization: Measurement of Radio Propagation in Outdoor Mobile Communication Environment (Niigata University)

Countermeasure for GNSS receiver failure

We provide technical white papers for each of the typical failures caused by GNSS receiver. For each failures, our experts in time synchronization explain details about countermeasures on receiver side, using diagrams to show the effectiveness, and how to select products. If you are considering a GNSS receiver for the first time, please take a look.

1. High stability with single band receiver
   White Paper: High Stability of 4.5ns (1 sigma) using a single band GNSS timing receiver
2. Multipath in Urban area
   White Paper: Industry-leading multipath mitigation in urban canyon environments
3. Jamming (interference wave)
   White Paper: Measures against GNSS jamming (jamming wave)
4. Spoofing
   White Paper: Measures against GNSS spoofing signals
5. Interruption of GNSS signal (holdover)
   White Paper: "Holdover function" as measures against GNSS reception interruptions

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For other contents, please contact us using the respective inquiry form.

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Documents, Software

Download documents and software related to this product and other GPS/GNSS products (Specifications document, Drivers and Monitor software).
 

Download contents for TB-1

• Operation Manual
• TB-1 App for Android™
• White Paper (Countermeasure for GNSS receiver failure)
• Article (Supporting Industrial and Societal DX Through Time Synchronization)
• Article (Strengthening Critical Global Infrastructure: Ushering in an Era of Dual Band GNSS Signal Reception for Time Synchronization)
• Article (Basics of Network Time Synchronization)
• Article (Supporting nanosecond-precise infrastructure with GNSS technology cultivated from marine business)

Download page

Documentation

• TB-1 Brochure
  (Last update: Feb 21, 2025)
• Time Synchronization Product Catalog
  (Last update: Apr 30, 2024)

Contact

Locate a Distributor Contact a local distributor for further details.

* Specifications subject to change without notice.