u-blox ZED-F9P, Integration Manual

Page: 4 / 110

ZED-F9P - Integration manual
3.7.7 GEOFENCE_STAT interface....................................................................................................... 43
3.7.8 RTK_STAT interface.....................................................................................................................44
3.8 Antenna supervisor.............................................................................................................................. 44
3.8.1 Antenna voltage control - ANT_OFF........................................................................................45
3.8.2 Antenna short detection - ANT_SHORT_N............................................................................ 46
3.8.3 Antenna short detection auto recovery.................................................................................. 46
3.8.4 Antenna open circuit detection - ANT_DETECT................................................................... 47
3.9 Multiple GNSS assistance (MGA)..................................................................................................... 47
3.9.1 Authorization................................................................................................................................ 48
3.9.2 Multiple servers............................................................................................................................ 48
3.9.3 Preserving information during power-off................................................................................48
3.9.4 AssistNow Online......................................................................................................................... 48
3.10 Clocks and time.................................................................................................................................. 52
3.10.1 Receiver local time.................................................................................................................... 52
3.10.2 Navigation epochs..................................................................................................................... 52
3.10.3 iTOW timestamps..................................................................................................................... 53
3.10.4 GNSS times.................................................................................................................................53
3.10.5 Time validity................................................................................................................................54
3.10.6 UTC representation...................................................................................................................54
3.10.7 Leap seconds..............................................................................................................................55
3.10.8 Real time clock........................................................................................................................... 55
3.10.9 Date...............................................................................................................................................55
3.11 Timing functionality...........................................................................................................................56
3.11.1 Time pulse...................................................................................................................................56
3.11.2 Timemark.................................................................................................................................... 60
3.12 Security.................................................................................................................................................61
3.12.1 Spoofing detection / monitoring............................................................................................ 61
3.12.2 Jamming/interference indicator............................................................................................ 62
3.12.3 GNSS receiver integrity............................................................................................................63
3.13 u-blox protocol feature descriptions.............................................................................................. 63
3.13.1 Broadcast navigation data...................................................................................................... 63
3.14 Forcing a receiver reset.....................................................................................................................70
3.15 Spectrum analyzer............................................................................................................................. 70
4 Design..................................................................................................................................... 71
4.1 Pin assignment......................................................................................................................................71
4.2 Power supply..........................................................................................................................................73
4.2.1 VCC: Main supply voltage.......................................................................................................... 73
4.2.2 V_BCKP: Backup supply voltage............................................................................................... 73
4.2.3 ZED-F9P power supply............................................................................................................... 74
4.3 ZED-F9P minimal design.................................................................................................................... 74
4.4 Antenna...................................................................................................................................................75
4.4.1 Antenna bias................................................................................................................................. 77
4.5 EOS/ESD precautions.......................................................................................................................... 79
4.5.1 ESD protection measures.......................................................................................................... 79
4.5.2 EOS precautions...........................................................................................................................80
4.5.3 Safety precautions...................................................................................................................... 80
4.6 Electromagnetic interference on I/O lines.......................................................................................80
4.6.1 General notes on interference issues...................................................................................... 81
4.6.2 In-band interference mitigation................................................................................................81
4.6.3 Out-of-band interference........................................................................................................... 82
UBX-18010802 - R08 Contents Page 4 of 110
Early production information