Time Synchronization
Product Catalog -vol.4• GNSS Timing Modules• GNSS Disciplined Oscillators (GNSSDO)• GNSS Reference - Rack mount & Portable• GNSS Antennas• GNSS Accessories

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GNSS Timing Receiver Modules
World's highest stability, <4.5 ns (1σ), lowest degradation of stability in harsh environments
GT-100 GT-9001

GT-90

GradeModel GT-100

●

●

●

GLONASS, Galileo, Beidou

●

●

●

NavIC

●
●

●

●

●

●

3.3V

3.3V

3.3V

●*

●*

●*TimingGNSS
GPS, QZSS, SBAS

■ Full-featured highly robust, dual band (L1 and L5)■ GPS, GLONASS, Galileo, Beidou, NavIC, QZSS, SBAS

Frequency bands■ Programmable frequency clock outputs synchronized with UTCL1●■ Clock input

L5●■ 1PPS stability: < 4.5nsec (1σ)

Interface■ 1PPS accuracy vs UTC: < 40 ns

UART■ TRAIM, DSS Multipath Mitigation, Anti-Jamming and Anti-Spoofing

Power supply
VoltageFeatures
Time pulse output (1PPS)

Model GT-9001

1PPS Stability (1σ)< 4.5ns

Accuracy (vs UTC)< ± 40ns

1PPS resolution< ± 0.2ns●PRTC-A & B compliance■ Single-frequency band with excellent cost performance■ GPS, GLONASS, Galileo, Beidou, QZSS, SBAS
■ Programmable frequency clock outputs synchronized with UTC

Clock output●*●*Holdover●●Clock Input

1PPS or frequency

Multi-path mitigation (DSS)■ Clock input

●

●

●

Advanced Anti-jamming

●

●

●

■ 1PPS stability: < 4.5nsec (1σ)

Anti-spoofing■ 1PPS accuracy vs UTC: < 40 ns

T-RAIM●●●■ TRAIM, DSS Multipath Mitigation, Anti-Jamming and Anti-Spoofing

Secure boot

●

●

●

Secure firmware update

●

●

●

* GT-100/GT-9001/GT-90 delivers accurate 1PPS synchronized with UTC.
GT-100/GT-9001 also includes three output clock signals.
The three outputs can be arbitrarily assigned to 1PPS and clock.

Model GT-90■ Single-frequency band with excellent cost performance■ GPS, GLONASS, Galileo, Beidou, QZSS, SBAS
■ 1PPS stability: < 4.5 nsec (1σ)■ 1PPS accuracy vs UTC: < 40 ns■ TRAIM, DSS Multipath Mitigation, Anti-Jamming and Anti-Spoofing

Model VN-100T

Evaluation Kit for GT-100

Model VN-9001T

Evaluation Kit for GT-9001

Model VN-90T

Evaluation Kit for GT-90(GNSS Antenna and monitoring software included)

GNSS Disciplined Oscillators (GNSSDO)
Model GF-8801

Model GF-8804

Model GF-8805■ Superb performance for time servers, communications
systems, 5G, broadcast systems

Model GF-8803

Model GF-8802■ Ultra-small form factor, atomic level frequency stability,
24h holdover (other than GF-8801)■ 24-hour holdover performance comparable to Rubidium 1.5μs/24 hours (GF-8805)■ Embedded multi-GNSS receiver, OCXO (TCXO on GF-8801),
LDO regulator & antenna detection circuit■ Embedded multi-GNSS receiver, high quality OCXO, LDO
regulator & antenna detection circuit■ Generate accurate, robust UTC time and 1PPS■ Generate accurate, robust UTC time and 1PPS

■ 10MHz synchronized with 1PPS

■ 10MHz synchronized with 1PPSGF-8801 GF-8802 GF-8803
GradeTiming

GF-8804 GF-8805
Grade

●

●

●

TimingGNSS

GNSS

GPS, QZSS, SBAS

GPS, QZSS, SBAS●●GLONASS●●●GLONASS●●

Galileo●●●

Galileo

●

●

●

●

●

●

●

●

Frequency bands
L1Frequency bands●●●Interface
UART

L1Interface●●●Features

UARTFeatures

●

●

●

1PPS Stability (1σ)< 4.5ns< 4.5ns< 4.5ns

1PPS Stability (1σ)< 4.5ns< 4.5ns

Accuracy (vs UTC)< ± 40ns< ± 40ns< ± 40ns

Accuracy (vs UTC)< ± 40ns< ± 40ns

Time pulse output (1PPS)Time pulse output (1PPS)PRTC-A compliance

PRTC-A compliance

PRTC-B compliance

PRTC-B compliance

10MHz output

10MHz output

Multi-path mitigation (DSS)

Multi-path mitigation (DSS)

Anti-jamming

●

●

●

Anti-jamming●●

Anti-spoofing

●

●

●

Anti-spoofing●●

T-RAIM●●●T-RAIM●●< ± 50us< ± 10us< ± 5us< ± 1.5us

5.5V

5.5V

Holdover (1PPS, 24h)
Power supply
Power supply voltage

Holdover (1PPS, 24h)
Power supply

3.7V

3.7V

3.7V

Power supply voltage

Evaluation Kits
(GNSS Antenna andmonitoring softwareincluded)

Model VF-81/82/83
For GF-8801/02/03 respectively

Model VF-84/85
For GF-8804/05 respectively

Field Time Sync Generator
Light, fast, accurate! Palm sized “Atomic Clock”
With an embedded high precision OCXO, TB-1 provides a 1 pulse
per second (1PPS) and a 10MHz reference frequency, bothsynchronized with UTC, ideal for time synchronization andModel TB-1

frequency measurement purposes in Telecom networks, digital
broadcasting, wireless/RF systems, V2X field testing.
TB-1 can be rack mounted for use as a timing reference in telecom
networks, data centres and RF systems.

■ GNSS Time Sync Reference for fixed and portable applications■ Rack mount brackets for use as an external clock fortelecoms & data centre systems■ Optional robust carry case with antenna, power anddata cables■ Quick Start of about 5 minutes and reliable in various
environments (urban canyons, in vicinities of tall buildings,indoors near windows, etc.)■ Highly stable 10MHz and accurate 1PPS output
synchronized to UTC
・G.8272 PRTC-B and PRTC-A compliant
・4.5ns (1 σ) using single band – Meet 5G required performance

GNSS Timing Antennas & Accessories
Multi-GNSS Timing Antenna

Coaxial lightning arrestor

Model AU-300

Model TVA-03C

Single band antenna forexcellent cost performance

Model TVA-03V

Model AU-500
Dual band antenna forhigh robustness■ Protect against lightning damage■ TVA-03C supports direct lightning surges,and TVA-03V supports induced lightning surges.
■ GPS (L1), GLONASS (L1), and Galileo(E1)■ Single and dual-band antennas (L1/L5)■ Support for global and regional satellite systems■ High gain, low noise■ Ideal for time synchronisation applications■ Superior out of band filtering■ Integrated ground plane

Antenna Mounting Kitfor AU-500 & AU-300
Model AFB-01■ Built-in lightning protection – IEC 61000-4-5■ IP67, CE, FCC & RoHS 2 compliant■ Anodized aluminium Pipe
■ Stainless steel clamp■ Pipe holding bracket

Unrivalledperformancefor(GNSSDO)
5G RAN, Time servers,
GNSS
Disciplined
Oscillators
Communication Systems

Model GF-8801

Robustness with dual-frequency band reception

Model GF-8804

A concern while operating criticalinfrastructure is interruption ofGF-8805
GNSS signals.Model
The dual-frequency
positioning system of L1 and L5■ Superb performance for time servers, communications
allowsthe GT-100 to maintainsystems, 5G, broadcast
systems

Model GF-8803

Model GF-8802■ Ultra-small form factor, atomic level frequency stability,
24h holdover (other than GF-8801)■ 24-hour holdover performance comparable to Rubidium covering one of the signals in the
1.5μs/24 hours (GF-8805)■ Embedded multi-GNSS receiver, OCXO (TCXO on GF-8801),
LDO regulator & antenna detection circuitof externalinterference
receiver,high quality
OCXO, LDO
■ Embedded multi-GNSSevent(jamming)
ina
particularfrequenregulator & antenna detection circuit■ Generate accurate, robust UTC time and 1PPS

cy band.
UTC time and 1PPS■ Generate accurate, robust■ 10MHz synchronized with 1PPS

proper time performance by■ 10MHz synchronized with 1PPSGF-8801 GF-8802 GF-8803
GradeExcellent behavior in harsh environments

Timing●●●

GF-8804 GF-8805
Grade●Timing●

GNSS

GNSS

GPS, QZSS, SBAS

GPS, QZSS, SBAS

Satellite Selection™ technology,

The proprietary “Dynamic

GLONASS●●●GLONASS●selects ●which appropriately

Galileo●●●

Galileohigh-quality satelliteeven● signals ●Frequency bands

in urban areas where multipath

L1

signals are mixed, minimizes

Frequency bands
L1●●●Interface
UART●Interface●●●Featuresin poor reception environments.
●UART●This technology can be usedFeaturessafely even at base stations

●

●

●

1PPS Stability (1σ)< 4.5ns< 4.5ns< 4.5ns

1PPS Stability (1σ)

Accuracy (vs UTC)< ± 40ns< ± 40ns< ± 40ns

Accuracy (vs UTC)Time pulse output (1PPS)●

degradation of timing performance

Time pulse output (1PPS) installed in urban areas.
●

PRTC-A compliance

PRTC-A compliance

PRTC-B compliance

PRTC-B compliance●< 4.5ns
4.5ns*Multipath resistance<technology
basedonan algorithm devised by NTT< ± 40ns< ± 40ns

10MHzoutput
10MHz outputIndustry-leading
holdover performance (GF series)
Multi-path mitigation (DSS)

Multi-path mitigation (DSS)

Anti-jamming

●

●

●

Anti-jamming

Holdover function of●GF-88 makes●

Anti-spoofing

●

●

●

Anti-spoofing

it possible to keep ●providing highly●

T-RAIM●●●

T-RAIM< ± 50us< ± 10us

Holdover (1PPS, 24h)
Power supply
Power supply voltage

accurate timing signals even after

Holdover (1PPS, 24h)
Power supply

3.7V

3.7V

3.7V

●

●

< ± 5us< ± 1.5ussatellite reception is lost, forexample due to antenna failure orjamming issues. Furuno offers aPower supply voltage

5.5Vseries 5.5V
wide range of GF-88

products. The GF-8802 provides
cost effective solutions and theEvaluation Kits
(GNSS Antenna andmonitoring softwareincluded)

GF-8805 provides industry-leading
Model VF-81/82/83
For GF-8801/02/03 respectively

holdover time duration. The GF-88
Model VF-84/85
series can also replace Rubidium
For GF-8804/05 respectively
oscillator as a clock source.

Unrivalled performance for 5G RAN, Time servers,
Communication Systems
About Furuno
Founded in 1951, Furuno Electric Co is a worldwide
leader in navigation and remote management
technologies. The company’s GNSS/GPS chips andmodules support precision timing and positioningsolutions. The products support all major navigation
satellite constellations such as GPS, Galileo,
BeiDou, GLONASS, QZSS and SBAS.

Superior Accuracy & Extremely High Stability
Essential for critical infrastructure(time server, telecom networks, energy systems,
data centres, financial trading, etc.)
ITU-T G.8272 PRTC Compliance
Meet 5G required performance

Highest Robustness in the Harshest Environments
Excellent behaviour in urban canyons thanks
to our advanced multipath mitigation (DynamicSatellite Selection™) algorithm
Superior Anti-Jamming and Anti-Spoofing
Measures to protect against malicious
attacks and maintain PNT integrity

Beware of similar products

All brand and product names are registered trademarks,
trademarks or service marks of their respective holders.

System Products Division
2-20 Nishinomiya-hama, Nishinomiya, 662-0934, Japan
Phone: +81-798-33-9588 Fax: +81-798-33-7511
Contact: https://www.furuno.co.jp/en/contact/cnt_gps_e01.html

Catalogue No. CA000002363