GT-100
Timing Multi-GNSS Receiver Module
Full-featured, highly robust model
supporting dual frequency band
Unrivalled performance for 5G RAN, Radio Systems, Timeservers
The world's highest stability <4.5ns (1σ)
Lowest degradation of stability in harsh urban environments
Delivers high stability 1PPS synchronized with UTC andprogrammable clocks on three channels
The GT-100 is a Multi-GNSS receiver module for timesynchronization that delivers high-stability, high-resolution
time pulse (1PPS) and programmable clocks. 1PPS achieves thetime stability of less than 4.5ns (1σ), which is required by themost demanding applications such as 5G mobile base stations.
GT-100 clock outputs can be set as required to 10MHz,
2.048MHz, 19.2MHz, and 30.72MHz or other frequencies
which are commonly used in wireless communications. The
user no longer needs to convert 1PPS to the desired frequency.
This shortens time-to-market and increases the customer'scompetitiveness by reducing component count.
The GT-100 also performs well not only in ideal environmentswith open skies, but also in urban areas with mixed multi-paths.
Our proprietary Dynamic Satellite Selection™* technology (DSS),which appropriately chooses only the high-quality satellite
signals, minimizes degradation of time stability. This makes theGT-100 ideal for 5G mobile base stations and precise PTP grandmaster clocks to be installed in urban areas.
* a new satellite signal selection algorithm developed by NTT
Interruption of GNSS satellite signals is a major concern during
operation of critical infrastructure systems.
GT-100 supports short term holdover, which maintains
constant performance even if GNSS satellite signals areinterrupted for a short period of time. Also, dual-frequencyband positioning (L1 and L5) mitigates the effects ofionospheric delays caused by solar flares, etc.
Time stability of less than 4.5ns (1σ) is achieved even when
receiving only L1 or L5. GT-100 can operate only on L5 if L1 isjammed, or only on L1 if L5 is jammed. The main applicationsof GT-100 include 5G mobile base stations, police radios,
emergency services radio systems, train radios, and timeservers. Highly robust Furuno's GNSS receivers for timesynchronization, which contribute to strengthening thecustomer's competitiveness, are also deployed in the latest 5G
mobile base stations. GT-100’s sophisticated built-in security
including secure boot and secure firmware update ensuresmaximum protection against tampering.

GT-100GradeTiming●

GNSS
GPS+QZSS/SBAS●GLONASS●Galileo●

BeiDou●●NavICFrequency band
L1, L5●Interfaces
UART●

FeaturedTime pulse output(1PPS)●Clock output●

Multipath resistant●(DSS)

Anti-jamming●

Anti-spoofing●

Secure boot●

Secure FW update●Power supply
Power-supply voltage

3.3VGNSS Timing Module
ModelGT-100

GNSS Reception
Capability (L1)
GNSS Reception
Capability (L5)GPS L1C/A, GLONASS L1OF, Galileo E1B/E1C,BeiDou B1I /B1C, QZSS L1C/A, SBAS L1C/A
GPS L5, Galileo E5a, BeiDou B2a, QZSS L5, NavIC L5

62 channels

GNSS Concurrent Reception
Sensitivity *1

Acquisition ： ≧ -147 dBm

ITU-T Recommendation

Compliant with G.8272 PRTC-A , G.8272 PRTC-B *5

Tracking ： ≧ -165 dBm

1PPS Stability *2< 4.5 ns (1σ)

1PPS Accuracy *2< ±40 ns (vs UTC)

1PPS Resolution±0.2 ns

TTFF (Typical)*3

Hot Start: 2 sec (Typ), Cold Start: 35 sec (Typ)1 MHz ～ 40 MHz

Clock Configurable Range

Stability : < 0.5ppb (1σ) Short Term Stability (Root Allan variance (=1s)) : < 5 x 10-10
Long Term Stability (24h average) : < ± 1 x 10-12

Clock Output-40℃ ～ +85℃

Operating Temperature
Supply Voltage

DC 3.3 V

Power Consumption *455mA

Package

47Pin LCC (Leadless Chip Carrier) 18.0mm x 17.8mm x 3.11mm

Interfaces

UART, Time Pulse (1PPS), Clock, External clock input

ProtocolPFEC (NMEA 0183 Ver4.11)

Security

Secure boot, Secure FW update
Anti Jamming (8CW), Multipath Mitigation (Dynamic Satellite Selection™), Anti-Spoofing, T-RAIM
Holdover, Antenna Detection Circuit.

Function*1 Measurement environment using GNSS simulator *2 Open sky *3 Measurement platform with recommended active antenna*4 Tracking Satellite outdoor *5 Compliant with TDEV (Time Deviation) /MTIE (Max Time Interval Error)

Evaluation Kit

Defining accuracy and stability

Evaluation kit for GT-100.
The Evaluation Kit can supply power and communicate with USB interface.
FEATURES•5VDC Power supply through USB bus power•Serial communication through USB•1PPS/Clock output from the SMA connectors•SMA antenna connection•Outer size is (w) 86mm x (D) 51mm x (H) 21mm
•Weight is about 65g•Accessories are USB cable, Multi-GNSS Antenna
and CD ROM containing the Communication
Software and the documentations

Accuracy refers to the maximum error deviation from UTC true value.
Stability refers to the degree of variation from accuracy over a period of time.
* FURUNO defines accuracy on the basis of UTC (vs UTC).

All brand and product names are registered trademarks, trademarks or service marks of their respective holders.
FURUNO ELECTRIC CO.,LTD.
System Products Division
2-20 Nishinomiya-hama, Nishinomiya City, Hyogo.
662-0934, Japan
TEL +81 798-33-9588

GNSS receiver homepage :https://www.furuno.com/en/gnss/
Product documentation :https://www.furuno.com/en/gnss/datadownload/Distributors :https://www.furuno.com/en/support/distributors/gnss/

Specifications subject to change without notice202302-2