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Summary of Contents for Furuno GF-8801
- Page 1 Multi-GNSS Disciplined Oscillator GF-8801, GF-8802, Model GF-8803 Hardware Specifications (Document No. SE19-410-006-00) www.furuno.com...
- Page 2 - SBAS (USA: WAAS, Europe: EGNOS, Japan: MSAS, India: GAGAN) Thus FURUNO is not liable for the degradation of the above systems so therefore FURUNO cannot guarantee specification based on their conditions. By solar flare or coronal mass ejection due to solar surface activity, depending on the scale, there is a possibility that a decrease in reception sensitivity or deterioration in precision may be temporarily observed.
- Page 3 GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 Revision History Version Change contents Date Initial release 2019.4.18...
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Page 4: Table Of Contents
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 Table of Contents Outline ······················································································································ 1 Function Overview ······································································································ 1 GNSS General Performance ························································································· 2 1PPS and Clock (VCLK, GCLK) Signal Specifications ······················································ 5 1PPS ··························································································································· 6 Clock (VCLK) ················································································································ 8 Clock (GCLK) ··············································································································· 9 Time to FINE LOCK ···································································································... -
Page 5: Outline
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 1 Outline This document describes the hardware specifications of GF-8801, GF-8802 and GF-8803 which is the GNSS Disciplined Oscillator (GNSSDO). This document uses GNSS as general term of GPS, GLONASS, Galileo and QZSS. 2 Function Overview This product is a GNSSDO that can provide PVT (Position, Velocity and Time) information. -
Page 6: Gnss General Performance
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 3 GNSS General Performance These performances are measured and evaluated under the environment shown in Figure 3-1. The measurement conditions are default setting and 25°C constant (no wind). When the signal level mask is set, the performance is limited by the mask. - Page 7 GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 Table 3-3. GLONASS performance Item Specification Note Signal type GLONASS L1OF Channel MAX 10 [*4] HOT acquisition sensitivity > -158 dBm [*5] COLD acquisition sensitivity > -144 dBm [*6] Tracking sensitivity > -158 dBm Re-acquisition sensitivity >...
- Page 8 GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 Table 3-6. QZSS L1S performance Item Specification Note Signal type QZSS L1S [*9] [*12] Channel MAX 2 [*4] COLD acquisition sensitivity > -130 dBm [*6] Tracking sensitivity > -134 dBm Re-acquisition sensitivity > -130 dBm...
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Page 9: 1Pps And Clock (Vclk, Gclk) Signal Specifications
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 4 1PPS and Clock (VCLK, GCLK) Signal Specifications The follow is the specifications of 1PPS and clock (GCLK, VCLK). Please refer to the eSIP Protocol Specification for switching setting etc. The performance described in this chapter is measured and evaluated under the environment shown in Figure 4-1 and 4-2 below. -
Page 10: 1Pps
[*5] MTIE of G.8272 PRTC-B compliant means that it meets the following specifications. Observation interval τ [sec] MTIE limit [nsec] 0.275τ + 25 1<τ<55 55<τ G.8272 PRTC-B compliant [*6] is GF-8802 and GF-8803 only. TDEV and MTIE of GF-8801 is G.8272 PRTC-A compliant. - Page 11 GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 Table 4.1-3. 1PPS output specifications [HOLDOVER] Item Specification Note GF-8801 < ± 50 usec @ < 24 hours / [*1][*3] 1PPS GF-8802 accuracy < ± 3 usec (TYP) @ < 1 hour / [*2][*3] (MAX|TE|) <...
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Page 12: Clock (Vclk)
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 4.2 Clock (VCLK) Table 4.2-1. VCLK general specifications Note Item Specification Nominal frequency 10 MHz GF-8801 < ± 5E-10 Short term stability (Root Allan variance GF-8802 < ± 5E-11 τ=1sec) GF-8803 < ± 2E-11 Table 4.2-2. -
Page 13: Clock (Gclk)
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 Clock (GCLK) Table 4.3-1. Clock (GCLK) output specifications Item Specification Note GCLK setting range 10 Hz to 40 MHz [*1] GCLK stability < ± 1 ppb @ 1sigma / [*2] GCLK output resolution < ± 8 nsec... -
Page 14: Time To Fine Lock
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 5 Time to FINE LOCK This product transitions to FINE LOCK for GPS time within 5 minutes from power on. However, the conditions are constant temperature and open sky. Otherwise, the time to FINE LOCK may be extended. -
Page 15: Environment Robustness Performance
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 7 Environment Robustness Performance Table 7-1. Environment robustness performance Item Specification Note Active anti-jamming 8 CW [*1] Multipath mitigation Available T-RAIM function Available [*2] Antenna current detection Available Spoofing signal mitigation Available Anti-spoofing / [*3] °C... -
Page 16: O Signal Description
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 9 I/O Signal Description 9.1 I/O Signal Description Table 9.1-1. I/O signal description Pin name Type PU/PD [*1] Note RST_N Digital input External reset input pin [*2] VANT Power supply input pin for antenna... -
Page 17: Pin Arrangement
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 9.2 Pin Arrangement #RF⇒ Figure 9.2-1. Top of view 9.3 Alarm Signal (ALM_N) It shows the status of “alarm” field in CRZ (TPS4) sentence. The alarm signal specification is shown in Table 9.3-1. Table 9.3-1. Alarm signal specifications... -
Page 18: Pps Input Signal For External Synchronization (Epps)
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 9.5 PPS Input Signal for External Synchronization (EPPS) When 1PPS is input to the EPPS pin and the command is set up, the VCLK and the PPS will be synchronized with the pulse. The synchronous target is the rising edge of the pulse to be input to the EPPS. Please refer to the “EXTSYNC”... -
Page 19: Electrical Characteristics
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 10 Electrical Characteristics 10.1 Absolute Maximum Rating Table 10.1-1 shows the values when used in the operating temperature range shown in Chapter 7. Stresses beyond those listed under those range may cause permanent damage to the product. -
Page 20: Power Supply
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 10.2 Power supply Below are power supply specifications. The conditions satisfying this specification are Ta = 25 °C. Table 10.2-1. Power supply Characteristics Note Item Symbol Unit VCC supply voltage VANT supply voltage VBK supply voltage... -
Page 21: Reset
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 10.3 Reset This product has an internal power-on reset circuit which detects the VCC voltage and creates POR_N (power-on reset) signal form initializing the module. Table 10.3-1 shows the threshold voltages to detect and create POR_N signal. -
Page 22: Baud Rate And Error
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 10.5 Baud Rate and Error Table 10.5-1 shows the relation between the baud rate and the deviation error for TXD. Table 10.5-1. Baud rate and deviation error (TXD) Baud rate [bps] Deviation error [%] 4800 +0.00... -
Page 23: Uart Wake-Up Timing
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 10.6 UART Wake-up Timing The start timing specifications of UART input / output are described below. Figure 10.6-1 shows the UART wake-up timing by the internal reset control (without external reset). RTH_POR 1ITXD1 Valid... -
Page 24: Recommended Gnss Antenna
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 10.7 Recommended GNSS Antenna Table 10.7-1. Recommended GNSS antenna Item Unit Note GPS/QZSS center frequency 1575.42 2.046 MHz bandwidth GLONASS center frequency 1602 9 MHz bandwidth Galileo center frequency 1575.42 4.092 MHz bandwidth Antenna element gain... -
Page 25: Rohs
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 11 RoHS This product is RoHS compliant. 12 Flame Retardancy Rank UL94V-1 compliance. 13 FIT GF-8801 ---2000FIT GF-8802 ---2500FIT GF-8803 ---3100FIT Calculation requirements - Telcordia 332 issue3 - Parts count method - Environmental factor: GF - Operating temperature: 50°C... -
Page 26: Equivalent Circuit
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 16 Equivalent Circuit Table 16.1 shows the equivalent circuits of digital signal port. Table 16.1. Equivalent circuit Pin name Equivalent circuit 1. RST_N 12. RXD 18. EPPS 11. VCLK 14. ALM_N 15. LOCK 16. GCLK 17. - Page 27 GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00...
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Page 28: Packaging
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 18 Packaging Below is a description of the packaging. This packaging is applied only when shipping the regular lot number (100 pieces). Regarding the shipment when the number of order is less than the regular lot number, we will contact you separately. -
Page 29: Warranty
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 [Exterior packaging] Interior box Attach the cushioning materials to the interior box. Cushioning material Put the interior box in the exterior box. Exterior box Close the cover with sealing tape, and attach the product label. -
Page 30: Special Attention
20.2 Electronic Component Components in this product are planned to be purchased from multiple manufacturers / vendors according to FURUNO’s procurement policy. Therefore, multiple components from multiple manufacturers / vendors may be used even in the same production lot. 20.3 Precautions at Mounting (1) This product contains semiconductor inside. -
Page 31: Precautions On Industrial Property Rights
GF-8801, GF-8802, GF-8803 Hardware Specifications SE19-410-006-00 20.4 Precautions on Industrial Property Rights (1) Since this document includes our copyrights and know-how, do not use it for any purpose other than the intended use of this product. Do not make any copies of this document and disclose it to any third parties without our prior consent.
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