Multi-GNSS Disciplined Oscillator Model GF-8704 Old Products (available)

Features

• Generates UTC-synchronized 1PPS (pulse per second) and continuously disciplined 10 MHz

  ・Reduces errors in digital communication by providing highly accurate and stable frequency

• Coherent behavior between time pulse (jitter less 1PPS) and frequency (10 MHz)

• Built-in high-sensitivity timing Multi-GNSS receiver with improved noise tolerance for harsh environments

  ・Receives concurrent GPS, GLONASS, QZSS (Quasi-Zenith Satellite System) and SBAS signals
  ・Flexible antenna installation locations thanks to high sensitivity and twice the number of satellites in view as opposed to GPS-only positioning
  ・Reduces effects of internal and external noise thanks to Active Anti-Jamming and Advanced Multipath Mitigation

• Supports world's best-in-class holdover function

  ・Even if GNSS falls into unlock, the FURUNO GNSSDO will predict oscillator behavior and automatically make corrections thanks to FURUNO's Advanced Oscillator Control Function
  ・Continuously outputs highly accurate and stable 1PPS and frequency
  ・Achieved superior cost/performance as a atomic oscillator replacement

• Support compatible design depending on customer's requirement

  Supports the same output format as well as pin-compatible design (GF-8704, GF-8705)
  ・GNSSDO can be customized to meet unique customer requirements
  
  [Specification]

  Product Name	Timing Specifications (1PPS)		Frequency Specifications (10MHz)	Size (mm)
  	Normal Status	Holdover	Normal Status (24h avg.)
  GF-8701	< ±100ns	-	< ±1×10-11	34 x 27 x 11
  GF-8702	< ±100ns	< ±50μs/24H	< ±1×10-12	34 x 27 x 15.5
  GF-8703	< ±100ns	< ±10μs/24H	< ±1×10-12	34 x 27 x 20
  GF-8704	< ±50ns	< ±5μs/24H	< ±1×10-12	100 x 52 x 20
  GF-8705	< ±50ns	< ±1.5μs/24H	< ±1×10-12	100 x 52 x 20

  
  [Test data]
  1PPS Timing Accuracy <± X μs continued from start of holdover.
   * Reference information only, values not guaranteed.

  Product Name	1PPS timing accuracy
  	< ±0.1μs	< ±0.4μs	< ±1.1μs	< ±1.5μs	< ±5μs	< ±10μs
  GF-8702	-	-	1H	2H	8H	16H
  GF-8703	-	1H	3H	4H	16H	-
  GF-8704	-	2H	6H	8H	-	-
  GF-8705	2H	6H	18H	-	-	-

• Time Synchronization

  Selectable sources for time synchronization from UTC time or GPS time

• Single satellite tracking capable operations (except Navigation Mode)

• Antenna Connection Status Check Function

  Checks the antenna connection status (Open or Short)
  ・Assesses antenna connection failure or malfunction easily

• Antenna Power Supply Function

  Provides power from GNSSDO directly to antenna
  ・Enabling a simplified antenna connection

• Backup Power Supply

  Significantly reduces recovery time to GNSS lock after rebooting or interruption

• Detect/Disable low integrity satellites (TRAIM function)

• Synchronization with external pulse

  Enables synchronizing to time pulse from an external source
  ・Usable to synchronize to time information such as IEEE1588 or SyncE obtained through the network
  ・Improves robustness of the system

• Arbitrary frequency output

  Enables arbitrary frequency output separately from reference frequency

• Wide operation temperature range

  ・-40°C to +85°C

• ITU-T G.8272/Y.1367 compliant

• Suitable for Grandmaster clock

• Suitable for various communication and broadcasting applications

  For infrastructure requiring product reliability
  ・Small cell applications including LTE (TDD/ MBSFN/ CoMP/ eICIC)
  ・Multimedia broadcast base stations or wireless base stations
  ・Smart grids

• Enhance performance in combination with recommended antenna

  Multi-GNSS antenna AU-217 receives GPS signal (L1 band) and GLONASS signal (G1 band), and has highly noise resistant as well as highly environmental resistant equivalent to IP67. Multi-GNSS antenna AU-217 is suitable for use with Furuno timing Multi-GNSS modules and disciplined oscillators.
  Here's more on  Multi-GNSS antenna AU-217

Specifications

GENERAL

GNSS Reception Capability

GPS L1 C/A, GLONASS L1OF, QZSS L1 C/A, SBAS L1 C/A

GNSS Reception

26 channels (GPS, GLONASS, QZSS, SBAS)

Sensitivity

GPS
Tracking: -161 dBm
Acquisition: -147 dBm

GLONASS
Tracking: -157 dBm
Acquisition: -143 dBm

*Measurement platform with recommended active antenna

Initial Stabilization Time

< 5 minutes (untill lock state)

10 MHz Output

Square pulse, Sine wave

10MHz Output (Lock State)

Frequency Accuracy (24h avg.): <±1×10^-12
Short Term Stability: <1×10^-10

1PPS Output (Lock State)

1PPS Accuracy: <±50ns
1PPS Stability: 15ns (1σ)

10MHz Output (Holdover)

Frequency Accuracy (24h): <±1×10^-9
Short Term Stability: <1×10^-10

1PPS Output (Holdover)

1PPS Accuracy: <±5μs/24h

Supply Voltage

5.5VDC

Power Consumption

400 mA (Typ) (5.5 V, Stable State)

Backup Supply

1.4 to 3.6VDC / 0.4 μA (Normal Operation)

Operating Temperature

-40°C to +85°C

Antenna Detection

Short and Open Detection

Outer Size

100mm x 52mm x 20mm

Protocol

eSIP (NMEA 0183 Standard Ver 4.10)

Anti-Jamming

Available

Multipath Mitigation

Available

Functions

External Referense Synchronisation, Output Status Signal

Evaluation Kit

Documents, Software

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

Download page

Contact

Locate a Distributor Contact a local distributor for further details.

* Specifications subject to change without notice.