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6.2. AIM+: USING THE SPECTRUM ANALYSER TO

DETECT AND MITIGATE INTERFERENCE

6.2.2 Wideband interference mitigation

Wideband interference of GNSS signals can be caused unintentionally by military and civilian
ranging and communication devices. There are also intentional sources of interference from
devices such as chirp jammers. The wideband interference mitigation system (WBI) of the
AsteRx-U MARINE Fg can reduce the eﬀect of both types of interference on GNSS signals.

Conﬁguring WBI mitigation

The wideband interference mitigation system (WBI) can be enabled by selecting ‘on’ as shown
in Figure 6-5.

Figure 6-5:

Select ‘on’ to enable wideband interference mitigation then ‘OK’ to

apply the new setting.

WBI mitigation in action

The GPS L1 band interference shown in Figure 6-6 is produced by combining the GNSS
antenna signal with the output from an in-car GPS chirp jammer.

Figure 6-6:

Simulated wideband interference in the GPS L1 band using an in-car

chirp jammer.

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Summary of Contents for AsteRx-U MARINE Fg

Page 1: ...AsteRx U MARINE Fg User Manual ...

Page 2: ...e as possible it may be that future features functionality or other product speciﬁcations change without prior notice or obligation The information contained in this manual is subject to change without notice We recommend you to look for new or updated information in our Knowledge Base at https customersupport septentrio com s topiccatalog Copyright 2000 2020 Septentrio NV SA All rights reserved S...

Page 3: ...ERING THE ASTERX U MARINE FG 16 3 2 CONNECTING AN ANTENNA 17 3 3 CONNECTING TO THE ASTERX U MARINE FG VIA THE WEB INTERFACE 17 3 3 1 Using the USB cable 17 3 3 2 Using the Ethernet cable 19 3 3 3 Over WiFi 20 3 4 HOW TO CONFIGURE SBF AND NMEA OUTPUT 21 3 4 1 Output over a serial COM connection 21 3 4 2 Output over Ethernet 26 3 4 3 Output over bluetooth 29 4 Rover operation 33 4 1 HOW TO CONFIGURE...

Page 4: ...ort SBF ﬁle 68 6 3 2 Diagnostic Report 70 6 4 ACTIVITY LOGGING 71 7 Receiver Administration Operations 72 7 1 HOW TO CHANGE IP SETTINGS OF THE ASTERX U MARINE FG 72 7 2 HOW TO CONFIGURE DYNAMIC DNS 73 7 3 HOW TO CONTROL ACCESS USING THE ASTERX U MARINE FG FIREWALL 74 7 4 HOW TO UPGRADE THE FIRMWARE OR UPLOAD A NEW PERMISSION FILE 75 7 5 HOW TO SET THE ASTERX U MARINE FG TO ITS DEFAULT CONFIGURATIO...

Page 5: ... more information see www septentrio com en environmental compliance 1 1 3 Safety information Statement 1 The power supply provided by Septentrio if any should not be replaced by another If you are using the receiver with your own power supply it must have a double isolated construction and must match the speciﬁcations of the provided power supply Statement 2 Ultimate disposal of this product shou...

Page 6: ...ebsite has a dedicated Support section http www septentrio com support where the User Manual the Firmware Reference Guide and the latest oﬃcially supported Firmware version are readily available for download Further information can be found on our website or by contacting Septentrio s Technical Support department In case the AsteRx U MARINE Fg does not behave as expected and you need to contact Se...

Page 7: ...o GNSS algorithms for robust industrial performance Integrated cellular modem Bluetooth WiFi and optional UHF radio 2 1 1 GNSS 544 hardware channels for simultaneous tracking of all visible satellite signals Supported signals GPS L1 L2 L5 GLONASS L1 L2 L3 GALILEO E5ab AltBoc E6 BEIDOU B1 B2 B3 Galileo and Beidou are optional features All in view SBAS EGNOS WAAS GAGAN MSAS SDCM incl L5 tracking Raw...

Page 8: ...cy antenna separation Heading Pitch Roll 1 m 0 15 0 25 5 m 0 03 0 05 Connectivity 3 hi speed serial ports RS232 Ethernet port TCP IP and UDP Full speed USB host and device 2 Event markers xPPS output max 100 Hz Integrated Bluetooth 2 1 EDR 4 0 Integrated Quadband Cellular Modem EDGE 2G 3G 3 5G 4G Integrated WiFi 802 11 b g n Integrated UHF 406 470 MHz Connector for separate L Band antenna Cellular...

Page 9: ...ronmental Size 164 x 157 x 54 mm Weight 1 5 kg Input voltage 9 36 V DC Power consumption 7 W typical Temperature Range 30 to 65 C operational 40 to 75 C storage Ingress Protection IP67 Humidity MIL STD810G Method 507 5 Procedure I Dust MIL STD 810G Method 510 5 Procedure I Shock MIL STD 810G Method 516 6 Procedure I II Vibration MIL STD 810G Method 514 6 Procedure I 9 ...

Page 10: ...SIGN 2 2 AsteRx U MARINE Fg design 2 2 1 Front panel The front panel layout of the AsteRx U MARINE Fg with attached Bluetooth WiFi and Cellular antennas is shown in Figure 2 1 Figure 2 1 AsteRx U MARINE Fg front panel layout 10 ...

Page 11: ... connected green Oﬀ Not logging On Logging active disk is mounted Blinking slowly Logging active disk space is low Blinking quickly Disk is full or not mounted green Oﬀ No reception of correction data Blinking Blinks on reception of correction data green Oﬀ No PVT available On PVT available green Oﬀ UHF radio modem disabled On UHF radio modem in search mode Blinking slowly Data package sent receiv...

Page 12: ...ot The SIM card can be inserted into the slot in the front panel of the AsteRx U MARINE Fg as shown in Figure 2 3 Important Only insert or remove the SIM card while the unit is powered down Note Please take care when closing the SIM card lid again and ensure the gasket is intact and properly seated and that the SIM card door is tightened with a torque force of 1 Nm to ensure the unit s IP rating r...

Page 13: ...s which can be ﬁtted to the unit as shown in Figure 2 4 Figure 2 4 Mounting brackets ﬁtted to the AsteRx U MARINE Fg 2 2 6 Internal memory The AsteRx U MARINE Fg has an 8 GB Memory for internal data logging Data can be logged in SBF or NMEA format and may be retrieved via the logging tab of the web interface 13 ...

Page 14: ...ollowing items with their part numbers are supplied as standard with the AsteRx U MARINE Fg Note that there are two sets of cellular antennas included with your AsteRx U product one high performance antenna which is recommended to be used when operating in 4G and one standard antenna 14 ...

Page 15: ...2 3 SHIPPING CASE CONTENTS 2 3 2 Optional items The following items with their part numbers can be optionally purchased for use with the AsteRx U MARINE Fg 15 ...

Page 16: ...red using the power adapter optionally available The power socket is indicated in Figure 3 1 Figure 3 1 Rear panel power socket The AsteRx U MARINE Fg does not have a power button1 and the unit will power up automatically when power is applied In case the AsteRx U is on when a power outage occurs the unit will automatically boot up when power is restored When the unit is powered initially the fron...

Page 17: ...ector 3 3 Connecting to the AsteRx U MARINE Fg via the Web Interface You can connect to the receiver on any device that supports a web browser using the receiver s on board Web Interface The connection can be made using either USB Ethernet or WiFi The following sections describe each of the connection methods 3 3 1 Using the USB cable Connect the combined USB Ethernet cable to the connector labell...

Page 18: ...allation The USB connection on the AsteRx U MARINE Fg functions as network adapter and the DHCP server running on the receiver will always assign the AsteRx U MARINE Fg the IP address 192 168 3 1 To connect to the AsteRx U MARINE Fg you can then simply open a web browser using the IP address 192 168 3 1 as shown in Figure 3 5 Figure 3 5 Connect to the Web Interface of the AsteRx U MARINE Fg over U...

Page 19: ...nnect to the AsteRx U MARINE Fg By default the AsteRx U MARINE Fg has the hostname http Asterx u fg xxxxxxx where xxxxxxx are the last 7 digits of the AsteRx U MARINE Fg serial number This hostname can be used on a local area network to connect to the AsteRx U MARINE Fg if the IP address assigned by the DHCP server is unknown The serial number can be found on a sticker on the corner of the outer c...

Page 20: ...oint named AsteRx U serial number The serial number of the AsteRx U MARINE Fg can be found on an identiﬁcation sticker on the receiver housing Select and connect to the AsteRx U MARINE Fg as shown in Figure 3 8 Figure 3 8 Select the AsteRx U MARINE Fg from the list of detected wireless signals and connect When your PC is connected to the AsteRx U MARINE Fg WiFi signal you can open a web browser us...

Page 21: ...ure connections to other devices in order to send data 3 4 1 Output over a serial COM connection The AsteRx U MARINE Fg can be connected via a serial COM cable to an RS 232 compatible secondary device2 Step 1 Conﬁgure the serial COM port The COM port of the AsteRx U MARINE Fg should be conﬁgured with the same baud rate and ﬂow control setting of the coupled device These settings can be conﬁgured v...

Page 22: ...3 4 HOW TO CONFIGURE SBF AND NMEA OUTPUT Figure 3 10 Conﬁgure the baud rate and ﬂow control of the AsteRx U MARINE Fg 22 ...

Page 23: ...MEA In the NMEA SBF Out tab clicking on New NMEA Stream will guide you through the steps needed to conﬁgure NMEA output as shown in Figures 3 11 and 3 12 Figure 3 11 Selecting to output NMEA data on COM3 Figure 3 12 Selecting to output the GGA NMEA message every second 23 ...

Page 24: ...cond output stream can be conﬁgured In the example shown in Figures 3 13 and 3 14 the PVTCartesian SBF data block will be output over COM1 once per second Figure 3 13 Selecting to output SBF data on COM1 Figure 3 14 Selecting to output the PVTCartesian SBF block every second 24 ...

Page 25: ...ure 3 15 Figure 3 15 Summary of all conﬁgured data output streams Figure 3 16 shows the actual data output NMEA is in ASCII and is thus readable unlike SBF which is formatted in binary In this example the serial COM was connected to a PC via a USB adapter which maps the serial connection to a virtual COM9 of the PC Figure 3 16 Example showing output NMEA GGA left panel and SBF PVTCartesian right p...

Page 26: ...igure 3 17 port 28785 has been conﬁgured as connection IPS1 in TCP2Way mode so data can be received as well as transmitted over the connection It is advisable to select a higher range port to avoid those reserved for other purposes such as the webserver and FTP Also port 28784 is reserved by default on the AsteRx U MARINE Fg for commands Note that a new IP port can also be conﬁgured by followings ...

Page 27: ...stream and follow the sequence of windows to conﬁgure the data you want to output In the example shown in Figure 3 18 the NMEA GGA message will be output every second Ensure that the previously conﬁgured IPS1 port is selected for output as highlighted Figure 3 18 Select to output NMEA GGA over the conﬁgured IPS1 connection 27 ...

Page 28: ...the connection In the highlighted ﬁelds insert the IP address or hostname of the receiver and the port number conﬁgured in Step 1 Click on Connect Figure 3 19 Conﬁgure the TCP IP connection settings in Data Link The info line at the bottom of the window should indicate that a connection has been made Click on the Show Data button to display the GGA data from the receiver as in Figure 3 20 Figure 3...

Page 29: ... on the AsteRx U MARINE Fg On the Overview tab of the Web Interface you can make sure that Bluetooth has been enabled When turned on it may take a few moments before it is declared Discoverable as shown in Figure 3 21 Figure 3 21 Turn on the bluetooth connection in the Overview tab When Bluetooth is enabled the front panel bluetooth LED will be lit as in Figure 3 22 Figure 3 22 Indicator LED on fr...

Page 30: ...n the NMEA SBF Out window click on New NMEA Stream as in Figure 3 23 This will guide you through the various steps to conﬁgure NMEA output Select Bluetooth as the connection type as shown Figure 3 23 Click on New NMEA Stream and select the desired settings in the following windows 30 ...

Page 31: ...h to a Getac tablet to provide positioning information for an agricultural guidance application called MachineryGuide Figures 3 24 and 3 25 show how the MachineryGuide App can be conﬁgured to use NMEA data from the AsteRs U over bluetooth Figure 3 24 Select bluetooth for GPS positioning information Figure 3 25 Find and pair the device to the AsteRx U MARINE Fg 31 ...

Page 32: ...ation When the AsteRx U MARINE Fg has been paired with a device and is sending data the NMEA SBF Out page will show a graphic similar to that shown in Figure 3 26 Figure 3 26 The NMEA SBF Out window when the AsteRx U MARINE Fg is bluetooth paired to a secondary device 32 ...

Page 33: ...ng the UHF radio When GSM GPRS network coverage is either sparse or unreliable RTK correction data can be transmitted over UHF radio The AsteRx U MARINE Fg has build in Satel radio modem that can be used to both receive and transmit data Step 1 Enable RTK mode RTK should be enabled as a positioning mode This can be done in the GNSS Position window by checking the RTK box in the Position Mode ﬁeld ...

Page 34: ...smitted signal protocol of the transmitted data error correction method FEC of the transmitted data Figure 4 2 Conﬁguring the built in UHF radio for rover operation After changing the settings click on OK to ﬁnalise the settings Each time the conﬁguration is changed a pop up in the lower right hand corner will prompt you to save the new conﬁguration as the boot conﬁguration Clicking on Save will c...

Page 35: ...ow replaced by a live green line as in Figure 4 3 The message format of the diﬀerential corrections will appear next to the right hand base station icon RTCMv3 in this example All being well the positioning mode icon in the upper status ﬁeld should also indicate RTK Fixed after a few seconds Figure 4 3 The AsteRx U MARINE Fg in RTK mode using diﬀerential correction data from a base station transmi...

Page 36: ... rover mode using the cellular modem and NTRIP Step 1 Enable RTK mode Ensure that RTK is be enabled as a positioning mode This can be done in the GNSS Position tab by checking the RTK box in the Position Mode ﬁeld as shown in Figure 4 4 Figure 4 4 Ensure that RTK has been enabled as a positioning mode 36 ...

Page 37: ...e conﬁgured in the Communication Cellular window as shown in Figure 4 5 A PIN number may or may not be required depending on the SIM conﬁguration In the Cellular Conﬁguration ﬁeld the Access Point Name APN should be inserted with other ﬁelds being optional Figure 4 5 Conﬁguring the cellular modem Click on Ok and if the settings are correct the cellular graphic should appear as shown in Figure 4 6 ...

Page 38: ...4 1 HOW TO CONFIGURE THE ASTERX U MARINE FG FOR RTK Figure 4 6 Correctly conﬁgured cellular modem 38 ...

Page 39: ...TRIP Casters typically provide multiple correction data streams known as Mount Points When a connection has been made to the Caster the Mount Point drop down list will become active In this example the FLEPOS_HOEG stream has been selected the details of which are shown in Figure 4 8 When using correction data from a virtual base station it is often necessary to provide your position to the NTRIP C...

Page 40: ... both the cellular modem and NTRIP connection have been correctly conﬁgured the Ntrip ﬁgure in Corrections NTRIP window will indicate diﬀerential correction reception as shown in Figure 4 9 with the positioning mode icon indicating RTK ﬁxed Figure 4 9 Correctly conﬁgured NTRIP connection 40 ...

Page 41: ...teRx U MARINE Fg as an RTK base station Conﬁgure the Ethernet connection and diﬀ corr output from the Base station receiver In the Corrections Output window click on New RTCM3 output to start the sequence of steps to conﬁgure the RTK diﬀ corr stream and Ethernet connection over which the diﬀ corr will be sent In the example shown in Figure 4 10 RTCMv3 correction data are sent out over port 28785 T...

Page 42: ...4 1 HOW TO CONFIGURE THE ASTERX U MARINE FG FOR RTK Figure 4 10 Click on New RTCM3 output to conﬁgure RTK diﬀ corr output over an Ethernet connection 42 ...

Page 43: ...shown in Figure 4 11 Figure 4 11 Ensure that RTK is enabled as a positioning mode Conﬁgure the Ethernet connection of the rover receiver On the IP Ports window of the rover receiver click on New IP Receive Connection as shown in Figure 4 12 to start conﬁguration sequence The Port and TCPAddress should match the port and IP address of the Base station receiver Figure 4 12 In the IP Ports window cli...

Page 44: ...he Communication Ethernet windows should appear similar to those shown in Figures 4 13 and 4 14 Figure 4 13 Ethernet window of the Base station receiver showing the position as static and an active output of RTCMv3 diﬀ corr on server port IPS1 Figure 4 14 Ethernet tab of the rover receiver showing a ﬁxed RTK position and reception of RTCMv3 diﬀ corr on receiver port IPR1 44 ...

Page 45: ...ntenna1 The AsteRx U MARINE Fg can use PPP correction data from the Fugro Marinestar service as described in the steps below Step 1 Check you have PPP permissions on your AsteRx U MARINE Fg The use of PPP services is permission ﬁle controlled on the AsteRx U MARINE Fg You can make sure that you have PPP permissions enabled on the About page selected from the Admin menu Click on Permitted Capabilit...

Page 46: ...o provide the serial number of the AsteRx U MARINE Fg This you can ﬁnd on the About page of the Web Interface shown highlighted in Figure 4 16 The Marinestar ID can also be retrieved from the label on the bottom side of the AsteRx U MARINE Fg and starts with the number 023 Figure 4 16 The serial number of the AsteRx U MARINE Fg is required to purchase a subscription for the Fugro Marinestar servic...

Page 47: ...nel connector The AsteRx U MARINE Fg oﬀers an additional connector for a dedicated L band antenna as shown in Figure 4 17 Figure 4 17 Rear panel antenna connectors Step 4 Select PPP positioning The PPP positioning mode is selected by default but you can check that it has indeed been selected in the GNSS Position tab as shown in Figure 4 18 Figure 4 18 The PPP positioning mode should be selected 47...

Page 48: ...e set in the Advanced Settings expandable ﬁeld A beam is characterized by a frequency and data rate Figure 4 19 Selecting an L Band beam You can ﬁnd a more information on Marinestar L Band beams here Without a Fugro Marinestar subscription the AsteRx U MARINE Fg will still be able track visible L Band signals Figure 4 20 shows the L Band Tracker Status ﬁeld when the AsteRx U MARINE Fg is locked on...

Page 49: ...ction data The Fugro Information ﬁeld should show a Marinestar ID and a Subscription End time and date as shown highlighted in Figure 4 21 After a few moments the AsteRx U MARINE Fg positioning mode should change to PPP as indicated by the highlighted icon in the upper status ﬁeld Figure 4 21 The Marinestar page of the AsteRx U MARINE Fg web interface when the Marinestar service has been successfu...

Page 50: ...AsteRx U MARINE Fg the receiver can calculate Heading and either Pitch or Roll This section details how to conﬁgure the AsteRx U MARINE Fg in a two antenna setup Step 1 Connect a second antenna Connect a second antenna to the rear panel connector labelled AUX ANT and indicated in Figure 4 22 Figure 4 22 Auxiliary antenna connector on rear panel 50 ...

Page 51: ...nna mode with attitude calculated using Fixed ambiguities as shown These setting are conﬁgured by default Antenna Location and Antenna Oﬀset The AsteRx U MARINE Fg assumes that the main and auxiliary antennas are placed along the longitudinal axis of the vehicle with the auxiliary in front of the main antenna If the antennas cannot be placed in such a conﬁguration the reported heading and pitch ma...

Page 52: ...d EndOfAtt These blocks are selected automatically when checking the Attitude box when conﬁguring SBF output via the NMEA SBF Out window as Figure 4 24 shows Figure 4 24 SBF blocks containing attitude information NMEA You can output the attitude information from the AsteRx U MARINE Fg in NMEA format by selecting the standard NMEA HDT sentence or the Septentrio proprietary HRP sentence as shown in ...

Page 53: ... Step 2 Conﬁgure the PPS settings You can conﬁgure the PPS settings on the PPS Timing window on the GNSS menu as shown in Figure 4 27 Figure 4 27 The GNSS PPS Timing window The Interval is the time interval between successive timing pulses and is selectable between 10ms and 10s The default Polarity of the PPS signal is a low to high transition which can be alternatively conﬁgured as high to low Th...

Page 54: ... PVT computation During PVT outages the PPS generation time which is extrapolated from the last available PVT information may start to drift To avoid large biases the receiver stops outputting the PPS pulse when the last available PVT is older than the speciﬁed MaxSyncAge The MaxSyncAge is ignored when TimeScale is set to RxClock 4 4 1 Time synchronisation using the PPS signal The PPS signal is an...

Page 55: ...of the rover may show more variation The Static position mode can be selected in the Position window of the GNSS menu as shown in Figure 5 1 Figure 5 1 Setting the AsteRx U MARINE Fg base station position to static Set the correct position An accurate position of the antenna that is connected to the AsteRx U MARINE Fg should also be set The default setting of auto can be used for demonstrations ho...

Page 56: ... position coordinates Figure 5 2 Setting the static position to the pre set Geodetic1 position Click OK to apply the new settings Step 2 Conﬁgure output of diﬀerential corrections Selecting the correction format and connection type Output of diﬀerential corrections can be conﬁgured in the Corrections Output window as Figure 5 3 shows Click on New RTCM3 output to start the sequence of conﬁguration ...

Page 57: ...kHz and at a power of 100 mW1 The transmission protocol and error method can also be selected on this page as shown The frequency and bandwidth are conﬁgured via the Advanced Settings menu Note that the baud rate of the connection depends on the Protocol and Bandwidth settings as given in Appendix 9 2 Figure 5 4 Conﬁguring the UHF radio 1 Please note that depending on your location you may be proh...

Page 58: ...guration If the UHF radio has been correctly conﬁgured the transmission line in the top panel should change to green as shown in Figure 5 5 The format of the corrections stream should also be correctly identiﬁed along with the data rate Figure 5 5 The UHF radio conﬁgured to transmit RTCMv3 diﬀ corr at 410 MHz 58 ...

Page 59: ... mount points and can also broadcast correction data from a remote NTRIP server All settings relating to the AsteRx U MARINE Fg NTRIP Caster can be conﬁgured on the NTRIP Caster window from the Communication menu Step 1 Deﬁne a new mount point Figure 5 6 The conﬁguration sequence for deﬁning a new mount point In the NTRIP Caster window click on the Settings tab In the General Settings ﬁeld enable ...

Page 60: ...lick Ok to apply the settings Step 2 Deﬁne a new user If you selected basic client authentication when conﬁguring the mount point in the previous step you will need to deﬁne at least one user The user name and password are the credentials needed for the NTRIP client rover to access the correction stream In the Client Users section click on New User as shown in Figure 5 7 Enter a User Name and Pass...

Page 61: ...U MARINE Fg NTRIP Caster On the NTRIP Client side Rover receivers can connect to the NTRIP Caster by entering its IP address and Port as shown in Figure 5 9 After clicking Ok the mount point source table will be ﬁlled and a mount point can be selected The user name and password can then be entered and within a few seconds the rover receiver should report an RTK ﬁxed position Figure 5 9 Connecting ...

Page 62: ...the AsteRx U MARINE Fg s operational status Figure 6 1 Overview page of the web interface The main information bar at the top of the window gives some basic receiver information receiver type serial number and position The length of time since the last power cycle Uptime and the attitude when a second antenna is connected are also given 62 ...

Page 63: ...VT A green line indicates that at least one satellite in the constellation is being used in the PVT a blue line indicates that satellites are being tracked but not used and a grey line that there are no satellites from that particular constellation in tracking More information can found in the Satellites and Signals page on the GNSS menu The UHF DiﬀCorr ﬁeld shows the diﬀerential correction format...

Page 64: ...f interference The eﬀects of wideband interference both intentional and unintentional can be mitigated by turning on the WBI mitigation system The WBI system also reduces more eﬀectively than traditionally used pulse blanking methods the eﬀects of pulsed interferers The spectrum view plot In the Spectrum window of the GNSS menu you can monitor the RF spectrum and conﬁgure three separate notch ﬁlte...

Page 65: ... In manual mode as shown conﬁgured for Notch1 in Figure 6 3 the region of the aﬀected spectrum is speciﬁed by a centre frequency and a bandwidth which is eﬀectively blanked by the notch ﬁlter Figure 6 3 Conﬁguring the ﬁrst notch ﬁlter Notch1 at 1235 MHz With the Notch1 settings as shown in Figure 6 3 the L2 band after the notch ﬁlter After IM is shown in Figure 6 4 with the blanked section clearly...

Page 66: ...he AsteRx U MARINE Fg can reduce the eﬀect of both types of interference on GNSS signals Conﬁguring WBI mitigation The wideband interference mitigation system WBI can be enabled by selecting on as shown in Figure 6 5 Figure 6 5 Select on to enable wideband interference mitigation then OK to apply the new setting WBI mitigation in action The GPS L1 band interference shown in Figure 6 6 is produced ...

Page 67: ...requency of 1575 MHz is clearly visible as Figure 6 7 shows In this particular test the interference signal caused the receiver to fall back to the less precise DGNSS or standalone positioning modes With WBI mitigation enabled however the receiver was able to maintain an RTK ﬁx position throughout Figure 6 7 Enabling WBI interference mitigation greatly reduces the eﬀect of the interference caused ...

Page 68: ...he Support SBF data blocks On the Logging page click on New SBF stream In the next window you can select the SBF blocks you wish to log By selecting Support as shown in Figure 6 8 the most useful SBF blocks for problem diagnosis will be automatically selected Click OK then turn on logging Again click OK to start data logging Figure 6 8 Click on New SBF stream and select Support Please note that lo...

Page 69: ...tive as indicated in Figure 6 9 Figure 6 9 The Logging window showing an active logging session Step 2 Downloading the logged SBF ﬁle To download a data ﬁle logged on the AsteRx U MARINE Fg click the download icon next to the ﬁlename on the Disk Contents tab as shown in Figure 6 10 Figure 6 10 Click the icon next to the ﬁle you want to download 69 ...

Page 70: ...A FOR PROBLEM DIAGNOSIS 6 3 2 Diagnostic Report A Diagnostic Report can be generated under the Admin About tab on the Web interface as shown in Figure 6 11 and saved to your PC Figure 6 11 Generate a Diagnostic Report 70 ...

Page 71: ... Receiver Messages window of the Admin menu that can be used to check receiver operations The example in Figure 6 12 shows that four 15 minute SBF ﬁles have been successfully FTP pushed to a remote location Figure 6 12 Events reported by the AsteRx U MARINE Fg in the Receiver Messages window 71 ...

Page 72: ...IP address can also be conﬁgured as shown in Figure 7 1 In Static mode the receiver will not attempt to request an address via DHCP but will use the speciﬁed IP address netmask gateway domain name and DNS DNS1 is the primary DNS and DNS2 is the backup DNS In DHCP mode the arguments IP Netmask Gateway Domain DNS1 and DNS2 are ignored Figure 7 1 Conﬁguring a static IP address The new IP address shou...

Page 73: ... may change over time resulting in a loss of connection Dynamic DNS DynDNS or DDNS is a service that addresses this problem by linking a user deﬁned hostname for the device to whichever IP address is currently assigned to it To make use of this feature on the AsteRx U MARINE Fg you should ﬁrst create an account with a Dynamic DNS provider dyndns org or no ip org to register a hostname for your rec...

Page 74: ...d on the IP Ports menu In the example shown in Figure 7 4 Ethernet ports 2101 2102 and 2103 are accessible but only from devices with the IP address 84 199 9 148 Similarly all WiFi ports are open but only those from IP 84 199 9 148 No access is possible via cellular ports Please note that the ﬁrewall settings do not apply when connecting to the web interface using USB In the case of WiFi ﬁrewall s...

Page 75: ...wnloaded from the Septentrio website and are free for the lifetime of the receiver Permission ﬁles enable additional features on the AsteRx U MARINE Fg and can be purchased via our sales department Step 1 Select the suf ﬁle and and start upgrade The upgrade procedure is started by clicking on Choose ﬁle in the Admin Upgrade tab as shown in Figure 7 5 Figure 7 5 The AsteRx U MARINE Fg upgrade windo...

Page 76: ...2 Verifying the upgrade If there were no problems with the upgrade the message Upgrade successful will appear You can then check on the Admin About tab that the AsteRx U MARINE Fg ﬁrmware or permission ﬁle has correct new version as indicated in Figure 7 7 Figure 7 7 Checking the ﬁrmware and permission ﬁle versions 76 ...

Page 77: ...tion Please note that this procedure will not erase the IP settings of the receiver This can only be done on the Ethernet page of the Communication menu 7 6 How to reset the AsteRx U MARINE Fg If the AsteRx U MARINE Fg is not operating as expected a simple reset may resolve matters The AsteRx U MARINE Fg can be fully power cycled using the front panel power button however via the Admin Reset tab a...

Page 78: ...lick the green download arrow next the conﬁguration you wish to download as shown in Figure 7 10 The conﬁguration will be saved as a txt ﬁle in the same downloads location used by the internet browser Figure 7 10 Downloading a conﬁguration from an AsteRx U MARINE Fg Step 2 Uploading the conﬁguration to a second AsteRx U MARINE Fg Click on the blue upload arrow as indicated in Figure 7 11 to upload...

Page 79: ...O COPY THE CONFIGURATION FROM ONE RECEIVER TO ANOTHER Select the conﬁguration ﬁle to be uploaded then click on OK on the status pop up as shown in Figure 7 12 Figure 7 12 Select the conﬁguration ﬁle to upload 79 ...

Page 80: ...ss as shown in Figure 8 1 User level allows full control of the receiver while Viewer level only allows monitoring the receiver and viewing its conﬁguration Figure 8 1 The default access levels of the AsteRx U MARINE Fg 8 2 Deﬁning user access to the AsteRx U MARINE Fg You can add users and deﬁne their access levels by clicking on the New user button as shown in Figure 8 2 You can also deﬁne the d...

Page 81: ...face as Viewers They can browse the various windows but cannot change any of the settings Only George who has User access can change receiver settings via the web interface FTP Anonymous users have full access to the disk over FTP so can download and delete logged data ﬁles IP COM USB and Bluetooth Ports Only George has User access to the IP COM USB and Bluetooth ports so can change receiver setti...

Page 82: ...ous users have full access over FTP SFTP and rsync to the ﬁles logged on the AsteRx U MARINE Fg FTP SFTP and rsync access can be limited by conﬁguring user access as described in Section 8 1 For added security user authentication for SFTP and rsync access can be conﬁgured using an SSH public key When an SSH key is deﬁned the conﬁgured user can download ﬁles using SFTP or rsync without entering a p...

Page 83: ...ublic key is the highlighted text that can be pasted directly into the SSH Key ﬁeld of the AsteRx U MARINE Fg Web Interface as shown in Figure 8 6 Figure 8 6 Using an SSH Key 521 bit ECSDA keys oﬀer the best security however ECSDA 256 and 384 bit keys can also be used Alternatively RSA 512 and 1024 key encryption is also supported 83 ...

Page 84: ... Comment 1 Power_IN power input 9 to 36 VDC Single power input with 2 Power_IN PINs 1 and 2 shorted together internally 3 Ground 4 Ground 9 1 2 PPS GPO Figure 9 2 5 pin female socket pin numbering guide as viewed end on Start counting at pin indicated by bold semi circle and follow the line in an anti clockwise direction This socket can be paired with a LEMO multipole male connector of type 0B PIN...

Page 85: ...A First EVENT input Max VIL 1V Min VIH 2V Max VIH 24V 15 KΩ pull down 3 Event B Second EVENT input Max VIL 1V Min VIH 2V Max VIH 24V 15 KΩ pull down 4 Ground 5 nRST_IN Reset signal 3 3V LVTTL 5V TTL input System is reset if the line is pulled low 0 6 V 6 GPI 2 reserved 7 Ground 9 1 4 COM2 Figure 9 4 9 pin female socket pin numbering guide as viewed end on Start counting at pin indicated by bold se...

Page 86: ...mment 1 RTS2 Serial COM 2 RTS line 2 Ground 3 5V output 5V DC output 500 mA max 4 RS232 reserved for future RS422 selection 5 Not connected 6 Rx2 Serial COM 2 receive line 7 Tx2 Serial COM 2 transmit line 8 CTS2 Serial COM 2 CTS line 9 Ground 86 ...

Page 87: ...be paired with a LEMO multipole male connector of type 1B The USB Host feature will only become fully functional in later ﬁrmware versions PIN Name Comment 1 USBH_VB reserved 2 USBH_DP reserved 3 USBH_DM reserved 4 not connected 5 Tx3 Serial COM 3 transmit line 6 Rx3 Serial COM 3 receive line 7 not connected 8 Rx1 Serial COM 1 receive line 9 not connected 10 Tx1 Serial COM 1 transmit line 11 Groun...

Page 88: ...is socket can be paired with a LEMO multipole male connector of type 1B PIN Name Comment 1 Ground 2 RXP Ethernet 10 100 RX 3 RXN Ethernet 10 100 RX 4 TXP Ethernet 10 100 TX 5 TXN Ethernet 10 100 TX 6 USB_DP USB 2 0 data signal positive D 7 USB_DM USB 2 0 data signal positive D 8 USB_VBUS USB Power Cannot be used to power the receiver 9 reserved 10 reserved 11 not connected 12 Ground 13 Ground 14 G...

Page 89: ...ate conﬁgurations 9600 and 4800 baud may not be suﬃcient and you should select a protocol bandwidth combination for 19200 baud For diﬀ corr rates of 0 5 Hz and less a 9600 baud setting is suﬃcient Protocol Modulation Forward Error Correction Default baud rate 12 5kHz Default baud rate 25kHz PCCGMSK GMSK always on 4800 bps 9600 bps PCC4FSK 4FSK always on 9600 bps 19200 bps PCCFST 4FSK always on 960...

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