GT-90
Timing Multi-GNSS Receiver Module
Highly precise time & ultra-low
jitter 1pps synchronized with UTCThe world‘s highest level of stability under open sky <4.5ns(1σ)
Single-frequency band positioning system with excellent
cost performance
World's lowest accuracy degradation in harsh urban
multipath environments

GT-90 is a Multi-GNSS receiver module for timesynchronization that delivers high-stability and high-resolution
time pulse (1PPS). Time stability of less than 4.5ns (1σ), idealfor 5G mobile base stations, is achieved with a singlefrequency band. This offers superior cost performance of thereceiver and allows widely available single-frequency antennas
to be used for greater total cost reduction.
GT-90 support all GNSS using L1 band, making it suitable for
integration into globally deployed equipment.
The GT-90 also performs well not only in ideal environmentswith open skies, but also in urban areas with mixed multipaths. Our proprietary Dynamic Satellite SelectionTM*
technology (DSS), which appropriately chooses only the highquality satellite signals, minimizes degradation of time stability.
* a new satellite signal selection algorithm developed by NTT
Jamming and spoofing are a threat to systems using GNSSreceivers.
GT-90 has countermeasures against these threats and can beused safely and securely in critical infrastructure applications.
The main applications of GT-90 include 5G mobile basestations, police radios, emergency services radio systems,
train radios, and time servers.
GT-90’s sophisticated built-in security including secure bootand secure firmware update ensures maximum protection
against tampering.

GT-90GradeTiming●GNSS
GPS+QZSS/SBAS●GLONASS●Galileo●BeiDou●Frequency bandL1●Interfaces
UART●FeaturesTime pulse output (1PPS)●Multipath resistant●（DSS)

Anti-jamming●

Anti-spoofing●Secure boot●

Secure FW update●Power supply
Power-supply voltage

3.3V

GNSS Timing Module
Model

GT-90

GNSS Reception
Capability

GPS L1C/A, GLONASS L1OF, Galileo E1B/E1C,BeiDou B1I /B1C, QZSS L1C/A, SBAS L1C/A

32 channels

GNSS Concurrent Reception
Sensitivity *1

Acquisition : ≧ -147 dBm

Tracking : ≧ -165 dBm

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

ITU-T Recommendation
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)

Clock Configurable Range

None

Operating Temperature-40℃ ～ +85℃

Supply Voltage

DC 3.3 V

Power Consumption *4

55mA

Package

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

Interfaces

UART, Time Pulse (1PPS)ProtocolPFEC (NMEA 0183 Ver4.11)

Security

Secure boot, Secure FW update
Anti Jamming (8CW), Multipath Mitigation (Dynamic Satellite Selection™), Anti-Spoofing , T-RAIM
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-90.
The Evaluation Kit can supply power and communicate with USB interface.
FEATURES•5VDC Power supply through USB bus power•Serial communication through USB•1PPS 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, JapanTEL +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