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GF-8801,  GF-8802,  GF-8803 

Hardware Specifications 

SE19-410-006-00 

18 

 

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 

9600 

+0.11 

19200 

-0.11 

38400 

+0.32 

57600 

-0.54 

115200 

-0.54 

230400 

+2.08 

460800 

-3.02 

 
Table 10.5-2 shows the relation between the baud rate and the lower and upper limit of tolerance error. 
 

Table 10.5-2. Baud rate and tolerance error 

Baud rate [bps] 

Tolerance error [%] 

Lower limit 

Tolerance error [%] 

Upper limit 

4800 

-4.64 

5.26 

9600 

-4.53 

5.38 

19200 

-4.74 

5.15 

38400 

-4.33 

5.60 

57600 

-5.15 

4.70 

115200 

-5.15 

4.70 

230400 

-2.65 

7.45 

460800 

-7.52 

2.08 

 

Summary of Contents for GF-8801

Page 1: ...www furuno com Multi GNSS Disciplined Oscillator Model GF 8801 GF 8802 GF 8803 Hardware Specifications Document No SE19 410 006 00...

Page 2: ...e specifications the contents described in this document are set as true and for items not described in this document the actual operations of this product are set as true For this product if you need...

Page 3: ...GF 8801 GF 8802 GF 8803 Hardware Specifications SE19 410 006 00 Revision History Version Change contents Date 0 Initial release 2019 4 18...

Page 4: ...for External Synchronization EPPS 14 9 6 Backup Power Supply VBK 14 9 7 RF_COAX and RF_PIN 14 10 Electrical Characteristics 15 10 1 Absolute Maximum Rating 15 10 2 Power supply 16 10 3 Reset 17 10 4 I...

Page 5: ...apability by Flash ROM Active Anti Jamming capability to suppress effects of CW jammers Effects Multi path mitigation GNSS high sensitivity An expensive external power supply component is unnecessary...

Page 6: ...ted by the mask Multi GNSS Simulator GSS6700 RF_COAX External LNA Gain 30 4dB NF 0 6dB Including Cable Loss GF 8801 GF 8802 GF 8803 NMEA sentence TXD Figure 3 1 Measurement platform Table 3 1 Time To...

Page 7: ...ileo performance Item Specification Note Signal type Galileo E1B E1C 8 Channel MAX 8 4 HOT acquisition sensitivity 136 dBm 5 COLD acquisition sensitivity 136 dBm 6 Tracking sensitivity 146 dBm Re acqu...

Page 8: ...130 dBm 2 The time from sending HOT restart command to re acquisition 3 The time from sending COLD restart command to re acquisition 4 Up to 32 channels are available for whole GNSS 5 After sending H...

Page 9: ...Evaluation Board GNSS rooftop antenna Universal counter 53132A Reference GNSS DO 1 1PPS 1PPS 10MHz CH1 CH2 REF IN phase delay Figure 4 1 1PPS measurement environment GF 880X Evaluation Board GNSS roo...

Page 10: ...4 6 1PPS stability MTIE G 8272 PRTC B compliant Relative MIN MAX value 2 5 6 1 It is necessary to adjust cable offset beforehand In addition it may be necessary to adjust the hardware offset of the en...

Page 11: ...0 40 8H 8H 5 H 24H Temperature Holdover t Frequency mode 240H 240H 240H Figure 4 1 1 Holdover measurement environment 2 This specification is satisfied when all of the following conditions are satisfi...

Page 12: ...This specification is satisfied when all of the following conditions are satisfied The time of power on is more than 7 days before Holdover FINE LOCK period open sky is more than 72 hours before Holdo...

Page 13: ...cifications for GCLK frequency setting 2 It is when the GCLK frequency is 100 Hz or more When less than 100 Hz output is possible but there is no stability specification 3 It is a mechanism to generat...

Page 14: ...ase Relation between PPS and VCLK Figure 6 1 shows the phase relation between PPS and VCLK This relation is coherent PPS VCLK TPPS R _VCLK R TPPS F _VCLK R Figure 6 1 Phase relation between PPS and VC...

Page 15: ...hen the number of satellites in use is larger than the minimum number of satellites required for positioning 3 This product has a function to notify an alarm by detecting a spoofing signal and to elim...

Page 16: ...output pin 14 ALM_N Digital output Alarm signal output pin 5 15 LOCK Digital output Lock signal output pin 6 16 GCLK Digital output GCLK output pin 10Hz to 40MHz 17 PPS Digital output PPS output pin 1...

Page 17: ...gic L Abnormal 9 4 Lock Signal LOCK It shows the status of frequency mode field in CRZ TPS4 sentence The output condition can be set by Lock port set field in MODESET command The lock signal specifica...

Page 18: ...e almanac and the ephemeris data should be received before the main power shut down Please refer to the eSIP protocol specifications for the data to be saved into the BBRAM 9 7 RF_COAX and RF_PIN RF_C...

Page 19: ...ose range may cause permanent damage to the product Table 10 1 1 Absolute Maximum Rating Item Symbol MIN MAX Unit Note VCC supply voltage VCC_ABS 0 3 6 0 V Backup supply voltage VBK_ABS 0 3 4 0 V VANT...

Page 20: ...VCC_SR 3 9x10 4 V s 1 VBK rising slew rate VBK_SR 3 6 3 6x10 4 V s 1 VCC current consumption at start up GF 8801 ICC_WU01 150 mA 2 GF 8802 ICC_WU02 800 2 GF 8803 ICC_WU03 1400 2 VCC current consumpti...

Page 21: ...by external reset signal RST_N with the following sequence tRSTLW L H Figure 10 3 1 Reset sequence Table 10 3 2 Reset sequence Item Symbol Min Max Unit Note Reset pulse width TRSTLW 300 ms 10 4 Interf...

Page 22: ...tion error 4800 0 00 9600 0 11 19200 0 11 38400 0 32 57600 0 54 115200 0 54 230400 2 08 460800 3 02 Table 10 5 2 shows the relation between the baud rate and the lower and upper limit of tolerance err...

Page 23: ...g after VRTH_POR Item Symbol TYP MAX Unit Note Time delay until periodic data output t1ITXD1 3 3 6 sec 1 Time delay until the command input is available t1IRXD1 3 3 6 sec 1 1 after VCC reaches VRTH_PO...

Page 24: ...ble to be stopped the power supply with the command This product incorporates an antenna current error sensing function In case of detecting an antenna current error the alarm ALM_N is output If the e...

Page 25: ...0 hours TA 85 C RH 85 2 High temperature high humidity storage life 1000 hours TA 85 C RH 85 3 Low temperature operating life 500 hours TA 40 C 4 Low temperature storage life 500 hours TA 40 C 5 Drop...

Page 26: ...GCLK 17 PPS 17 Mechanical Specifications The mechanical specifications are shown on the next page The notes are as follows Notes 1 Dimensional tolerance is 0 2mm unless otherwise stated 2 Products lab...

Page 27: ...GF 8801 GF 8802 GF 8803 Hardware Specifications SE19 410 006 00 23...

Page 28: ...s 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 Interior...

Page 29: ...ty term of this product is one year after the delivery Exterior packaging Cushioning material Interior box Attach the cushioning materials to the interior box Exterior box Put the interior box in the...

Page 30: ...rs to ensure no multipath signal or other reception issues exist Also check the overall environment where the GNSS antenna will be located 5 Ensure a stable power supply connection 6 Install in a stab...

Page 31: ...nt 2 Except the use of this product itself the sale and its disposal the sale of this product to you does not grant explicitly or implicitly the right of use or implement any Intellectual Property rig...

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