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Nortek Signature VM Coastal Manual

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NORTEK MANUALS
Signature VM Coastal & Ocean -
Manual
N3015-026 | V2.9

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  • Page 1 NORTEK MANUALS Signature VM Coastal & Ocean - Manual N3015-026 | V2.9...

  • Page 3: Table Of Contents

    Connecting to the Computer ................. 20 Ch. 5 Acquisition Software Connecting the GNSS ................25 Checking the GNSS ................26 Connecting the Signature ..............27 5.3.1 Additional Options ..................28 Checking the Signature ................. 29 Status panel ..................29 © 2024 Nortek Netherlands B.V. v2.9.
  • Page 4 Signature VM Coastal & Ocean - Manual Ch. 6 Measuring ADCP Measuring Essentials ..............31 Configuration ..................32 6.2.1 Save Configuration during Acquisition or during Playback ......36 Start measuring ..................36 Measuring and Display ................40 6.4.1 Status ......................40 6.4.2...

  • Page 5: Contents

    Ch. 11 Triggering and time-synchronization 11.1 Triggering ..................... 80 11.1.1 Ping-based triggering (Signature triggering) ..........81 Signature Triggering: Slave mode ..............81 Signature Triggering: Master mode .............. 81 Signature Triggering: RS-485 options ............82 © 2024 Nortek Netherlands B.V. v2.9.
  • Page 6 Signature VM Coastal & Ocean - Manual Signature Triggering: Software command ............. 82 11.1.2 Ensemble-based triggering ................82 Hardware trigger ..................83 Software trigger ..................84 Time synchronization ................85 11.2 11.2.1 Internal clock ....................85 11.2.2 PTP ....................... 85 11.2.3...

  • Page 7: Introduction

    We appreciate your comments and your fellow users will as well. Contact Information We recommend first contacting your local sales representative before the Nortek main office. If you need more information, support or other assistance, you are always welcome to contact us or any of our subsidiaries by email, phone or fax.

  • Page 8: Table 1: Revision History - Manual N3015-026

    Signature VM Coastal & Ocean - Manual Table 1: Revision history - Manual N3015-026 Version Date Supports Notes software version Version 2.9 jul-2024 Echosounder functionality reworked Version 2.8 apr-2024 Various extra trigger options; NTP as an optional time-source Version 2.7 sep-2023 Layer;...

  • Page 9: Health And Safety

    Directive 2012/19/EU (WEEE). It is a requirement NOT to dispose of the equipment as unsorted municipal waste but to use the return to collection systems according to local law or return to the Nortek facilities. Relevant plastic parts on the Signature sensor are marked for end-of-life...

  • Page 10: Scope, Disclaimer, And Pending Changes

    Signature VM Coastal & Ocean - Manual Scope, disclaimer, and pending changes This manual This manual describes the Signature VM product, in particular the Signature VM software. Please be aware that the Signature VM is a product family. Different products in this family use or can use different versions of the Signature VM sensor.

  • Page 11: System Overview

    The figures below show the Signature 1000 system but can be translated easily to any of the Signature sensors like the Signature 500, 250, 100 and 55. The Signature 1000, 500, 250 and 100 sensor heads have five acoustic transducers, four slanted at 25 or 20 degrees from © 2024 Nortek Netherlands B.V. v2.9.

  • Page 12: Gnss Receiver

    Signature VM Coastal & Ocean - Manual vertical, and a fifth vertical beam. For dimensions, please refer to the specific instrument data sheet, available for download from our website. The pressure sensor, temperature sensor and LED light are all visible from the outside. Also...

  • Page 13: Data Acquisition System

    The complete system is mounted in a ½ width 19” rack. It can be controlled using a local keyboard and monitor, or from a remote location over Ethernet. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 14: Getting Started

    Signature VM Coastal & Ocean - Manual Getting Started This chapter deals with installation of the accompanying software, connecting to the instrument and other information that is important for first time use of the instrument. Checking the Inventory Check the content of the received package against the packing list included in the shipment. Do not hesitate to contact us if you find any part of the delivery missing.

  • Page 15: Connecting The Parts

    The 8-Pin connector is not used in this configuration and should be fitted with a ‘dummy’ connector. Figure 8: Signature Sensor connections When mating the SubConn connectors pay attention to the following guidelines: © 2024 Nortek Netherlands B.V. v2.9.

  • Page 16: Figure 9: Greasing The Connector

    Signature VM Coastal & Ocean - Manual Figure 9: Greasing the connector · Connectors must be greased with Molykote 44 Medium before every mating. A small amount of grease is supplied with the system. · A layer of grease corresponding to minimum 1/10 of socket depth should be applied to the female connector ·...

  • Page 17: Gnss Connection

    Push the ring while turning it clockwise until it clicks to lock. It is a bayonet lock, so it should not need more than a 30~40 degrees rotation. This may take considerable force, and it is best to use the supplied 'Connector wrench’. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 18: Figure 11: Connecting The Gnss Connector

    Signature VM Coastal & Ocean - Manual Figure 11: Connecting the GNSS connector The other end of the cable has a large plastic Ethernet connector that fits the one on the rear of the interface box. This bayonet lock may be difficult to lock when new.

  • Page 19: Computer Connections

    Power On 4.4.4 Switch on the interface first, then switch on the computer by pressing the main button on the front-panel for a second and then releasing it. Figure 14: Switching the system on. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 20: Power Off

    Signature VM Coastal & Ocean - Manual Power Off 4.4.5 When powering the system off, first switch off the computer using the ‘power down’ menu, or by using the switch. Then switch off the interface. Connecting to the Computer 4.4.6 Though it is possible to connect to the Signature VM PC using a keyboard/mouse/monitor, the general idea is to use a remote desktop connection from a laptop.

  • Page 21: Figure 15: Configuring Windows For Use With The Remote Desktop Connection

    Getting Started Figure 15: Configuring Windows for use with the Remote Desktop connection © 2024 Nortek Netherlands B.V. v2.9.

  • Page 22: Figure 16: Setting Up Remote Desktop

    Signature VM Coastal & Ocean - Manual Figure 16: Setting up Remote Desktop Figure 17: Dark Theme v2.9. © 2024 Nortek Netherlands B.V.

  • Page 23: Figure 18: Desktop Theme Selection

    Getting Started Figure 18: Desktop theme selection © 2024 Nortek Netherlands B.V. v2.9.

  • Page 24: Acquisition Software

    Signature VM Coastal & Ocean - Manual Acquisition Software Figure 19: Signature VM software main window Once everything is connected, start the Signature VM software. Each window may be moved, rescaled, or closed if required. To recover a window, or to reset the screen layout to defaults, click on one of the five window recovery buttons in the lower left.

  • Page 25: Connecting The Gnss

    Make sure the adapter shows ‘SurveyVM Interface’ . Click ‘Connect’ to start reading the GNSS data. The IP Address and Port box will turn grey and the button text will change to ‘Disconnect’. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 26: Checking The Gnss

    Signature VM Coastal & Ocean - Manual Figure 21: GNSS Connection Checking the GNSS Once the GNSS is connected, click on ‘Web page’. This will open the internal web-interface page of the GNSS Sensor (see figure Figure 22: GNSS WEB interface v2.9.

  • Page 27: Connecting The Signature

    Click ‘Connect’ to start the Nortek sensor. The address / serial number box will turn grey and the button text will change to ‘Disconnect’.

  • Page 28: Additional Options

    Signature models have this option). This data can then be processed by other navigation instruments. The option will give the Signature a similar functionality as a Nortek DVL. This option is only available with a special license, the DF21 an DF22 output options will not be visible if this license is not present.

  • Page 29: Checking The Signature

    Note that the trigger indicator (TRG) is only visible if the trigger option has been selected in Connection options. For details of the status panel, other than these status indicator 'lights', see section Status © 2024 Nortek Netherlands B.V. v2.9.

  • Page 30: Table 2: Meaning Of The Colors Of The Status Indicators

    Signature VM Coastal & Ocean - Manual Table 2: Meaning of the colors of the status indicators YELLOW GREEN Position (GGA) No Data from 2D Fix (degraded 3D GNSS Fix GNSS accuracy) Heading (HDT) No Data Heading from internal gyro Heading from the Dual sensors.

  • Page 31: Measuring

    Its harder to track the bottom at higher speeds. To an extent: it is harder to track on a soft layer on shallower water. Deeper is better, up to the maximum range of course. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 32: Configuration

    Signature VM Coastal & Ocean - Manual Configuration Start by checking the configuration and adjust the necessary variables. Click the ‘Configuration’ button to bring up the settings. Initially, the different categories of settings will be collapsed (see figure Click the small triangle to the left of a category of settings to switch between the collapsed and the expanded view.

  • Page 33: Figure 29: Configuration Pop-Up Window

    Measuring Figure 29: Configuration pop-up window © 2024 Nortek Netherlands B.V. v2.9.

  • Page 34: Table 3: Configuration Details

    Signature VM Coastal & Ocean - Manual Table 3: Configuration details Setting Default Description Application Settings Display Units Metric Distance and speed on the screen in m/s or Knots and feet Theme Nortekblue dark Display theme, application colors, background heatmap...
  • Page 35 " for details. Processing Settings Amplitude Limit (blank) Any measured cell where the amplitude is lower than this limit is discarded. If left blank, no limit is applied. Average Interval [s] Measurements averaged over this interval. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 36: Save Configuration During Acquisition Or During Playback

    Signature VM Coastal & Ocean - Manual Setting Default Description Correlation limit [%] Any measured cell where the correlation is lower than this limit is discarded. If left blank, no limit is applied. Echosounder Settings Noise level dB (blank) Base noise level of the echosounder. The data of the echosounder as shown is the volume backscatter strength.

  • Page 37: Figure 30: Start Measurement Pop-Up Window

    ‘Start’ button will be disabled. Table 4: Measurement settings details Setting Default Description Environment Salinity / Sound Velocity 35 / 1500 Click on this field to switch between ‘Salinity’ or ‘Sound-Velocity’ © 2024 Nortek Netherlands B.V. v2.9.
  • Page 38 Signature VM Coastal & Ocean - Manual Setting Default Description The salinity is 0 for fresh water and typically 35 ppt for the ocean. This is used for automatic calculation of sound-velocity. If Sound Velocity is selected, a fixed speed of sound in water has to be entered.

  • Page 39: Figure 31: Deployment Details

    ‘Recording’ group of buttons (see figure ). Use ‘Next recording’ to create a new file. This may be useful to start a new file when a specific area or track is started. Figure 32: Recording and recording status © 2024 Nortek Netherlands B.V. v2.9.

  • Page 40: Measuring And Display

    Signature VM Coastal & Ocean - Manual Measuring and Display Status 6.4.1 The status panel shows a set of panels with various metrics for insight in the status of the connected instruments and the data recorded. Figure 33: Status panel overview...

  • Page 41: Figure 34: Hover Over A Sub-Panel To Show Its Values In The Center Panel And Show An Explanatory Pop-Up Balloon

    The bottom line of the status panel contains the text “Measurement settings”. Hover the mouse over this text, and a pop-up will show a list of detailed settings as configured for the measurements. Figure shows an example. Note that if you do not move the mouse the © 2024 Nortek Netherlands B.V. v2.9.

  • Page 42: Figure 36: Hover Over "Measurement Settings" For A List Of Details

    Signature VM Coastal & Ocean - Manual pop-up will stay visible for a short time only; if you move the mouse away from the text “Measurement settings” the pop-up will disappear immediately. Figure 36: Hover over "Measurement settings" for a...

  • Page 43: Track Display

    (indicating “on”) is the same as the corresponding feature as drawn on the map. £ The other items have a regular toggle box ( ), see table for details on each option. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 44: User Defined Background Map

    Signature VM Coastal & Ocean - Manual Table 6: Map display options Options Description GNSS Show the track as recorded by the GNSS positions. Heading line Show a straight line that marks the heading according to the GNSS compass. Altimeter Show the depth value at regular intervals.

  • Page 45: Echograms

    MBTiles files can have a set of zoom levels and cover a larger area than GeoTIFF images. Note that after selecting a new folder for the data, it might take a while before the new maps become available. Echograms 6.4.4 Figure 40: Echograms with displaying options © 2024 Nortek Netherlands B.V. v2.9.

  • Page 46: Layer

    Signature VM Coastal & Ocean - Manual The chart at the top shows the magnitude (absolute value) of the current velocity. The lower chart can show either ‘Direction’, ‘Correlation’ or ‘Amplitude’ for one of the four beams, or, if available and switched on, one of the ‘Echosounder’ channels.

  • Page 47: Keyboard Shortcuts

    <Tab> and Arrow Keys Move between settings. Use Spacebar to toggle checkboxes <Ctrl>-R Reset bottom track. Re-Align the bottom track with the vessel position on the Map Zoom in on the Map Zoom out on the Map <Ctrl> Arrow Keys Pan the Map © 2024 Nortek Netherlands B.V. v2.9.

  • Page 48: Adding Notes

    Signature VM Coastal & Ocean - Manual Adding Notes Figure 43: Adding notes When measuring, it is possible to add notes. Notes will be tagged automatically with the time and position and are stored in the data file. To add a note, click the ‘Pencil’ icon. This will open the notes window where you can enter text in the lower part.

  • Page 49: Error Messages

    Practically, that means that the return echo is compressed in its pulse duration in special filters, which results in very high-resolution data. Pulse compression thus provides a method to further resolve targets compared to “normal”. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 50: Noise Level

    Signature VM Coastal & Ocean - Manual Benefits: The best resolution is achieved with pulse compression; minimum resolution is 3mm for Signature1000 and 6mm for Signature500. The Signal to Noise Ratio (SNR) increases because the length of the transmit pulse can be increased without affecting the resolution.

  • Page 51: Figure 46: Echosounder Image

    Measuring Figure 46: Echosounder image © 2024 Nortek Netherlands B.V. v2.9.

  • Page 52: Offsets

    Signature VM Coastal & Ocean - Manual Offsets Before starting the actual measurement, it is important to align all sensors. The configuration contains two sub-sections for entering the offsets between the sensor and the GNSS relative to the vessel. All calibration factors can still be changed in post processing without further consequences.

  • Page 53: Horizontal And Vertical Offsets

    (figure ) where the GNSS is mounted on the roof of the vessel. When entering X, Y and Z offsets it is important to start from deciding what is the actual reference point. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 54: Figure 51: Offsets From The Gnss To The Signature

    Signature VM Coastal & Ocean - Manual On professional work vessels the Center Of Gravity (COG) is known and can be used as a reference point (0,0,0), in this case both the Signature instrument and GNSS offsets need to be entered.

  • Page 55: Offsets Diagram

    GNSS direction to compute the valid orientation of the Signature instrument. For instructions on how to manually set the orientation of the Signature and GNSS, please refer to section Manual alignment procedure © 2024 Nortek Netherlands B.V. v2.9.

  • Page 56: Figure 53: Automatic Alignment

    Signature VM Coastal & Ocean - Manual Figure 53: Automatic alignment To be able to automatically align the instruments you need to be measuring and both bottomtrack and GNSS data should be available. Ideally you sail a straight line for a few hundred meters and then press the 'Auto align Signature' button.

  • Page 57: Manual Alignment Procedure

    ) this is not the case. This also shows up very clearly in the track plot (figure ). The blue line shows the track according to the GNSS, the red line according to the bottom tracking. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 58: Figure 56: Aligning For Bottom Track

    Signature VM Coastal & Ocean - Manual It’s clear that the bottom track direction is about 45 degrees off, which is due to the 45 degrees offset of the Signature sensor. To correct for this, open ‘Configuration’ and adjust ‘Orientation’ for the Signature mounting, in this case to -45 degrees.

  • Page 59: Data Output

    An asterisk (*) delimiter and checksum value follow the last field of data contained in an NMEA- 0183 message. details calculation checksum, see, e.g., https://en.wikipedia.org/wiki/NMEA_0183. (Note that the official NMEA 0183 Interface Standard document is a copyrighted document; see https://www.nmea.org/nmea-0183.html.) © 2024 Nortek Netherlands B.V. v2.9.

  • Page 60: Ad2Cp Format

    AD2CP format The AD2CP data format is a binary format developed by Nortek. Details of the format can be found in the “Integrator’s Guide – Signature” https://support.nortekgroup.com/hc/en-us/articles/360029513952-Integrators-Guide-Signature The AD2CP format is enhanced with optional IEC61162-450-timetagged NMEA navigation information.

  • Page 61: Output Destinations

    UDP sends its messages whether they are received or not (and does not attempt resending). There are two distinct ways to use the UDP output: © 2024 Nortek Netherlands B.V. v2.9.

  • Page 62: Data Rates

    Signature VM Coastal & Ocean - Manual UDP Broadcast – in this case the UDP packets are delivered to any pc on the network. This can cause an unwanted and unnecessary amount of network traffic as the data packets are also delivered to computers on the network that are not interested in it.

  • Page 63: Nmea Message Details

    E or W The letter ‘E’ or ‘W’ for East or West Quality GPS Quality Indicator Nr Of Satellites Number of satellites in view, 00 - 12 HDOP Horizontal Dilution of precision (meters) dd.d © 2024 Nortek Netherlands B.V. v2.9.

  • Page 64: Sdvtg - Track Made Good And Ground Speed

    Signature VM Coastal & Ocean - Manual Field Description Data Format Altitude Antenna Altitude above/below mean-sea-level dd.dd (geoid) (in meters) Units of antenna altitude, Meters Separation Geoidal separation, the difference between the dd.dd WGS-84 earth ellipsoid and mean-sea-level (geoid), "-"...

  • Page 65: Vdvbw - Dual Ground / Water Speed

    $VDVHW – Vessel through water Speed and Direction The VHW sentence contains the speed and direction of the vessel relative to the water. By default this is the vessel speed relative to the water speed averaged over the full water column. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 66: Proprietary Nmea Sentences

    Kilometers Proprietary NMEA sentences 8.4.2 The following messages are a subset of the messages as used by the Nortek DVL (Doppler Velocity Log), but the ‘Tagged NMEA’ versions are not supported (e.g. $PNRTS2,DATE=083013,TIME=132455,EC=0, SC-34000034…). By default the NMEA messages are sent with the $PNRT prefix, these messages are compliant with the NMEA IEC61162-1 standard.
  • Page 67 $P---CV – Velocity data per Cell Field Description Data format Date Date MMDDYY Time Time in UTC, 0-24H, 0.01 second resolution Hhmmss.ss Cell Number Cell Position Distance from sensor to centre of the cell[m] dd.dd © 2024 Nortek Netherlands B.V. v2.9.
  • Page 68 Signature VM Coastal & Ocean - Manual Field Description Data format Velocity East [m/s] dd.ddd Velocity North [m/s] dd.ddd Velocity Up [m/s] dd.ddd Velocity Up2 [m/s] dd.ddd Speed [m/s] dd.ddd Direction [degrees] ddd.dd Amplitude Units D=dB Amplitude Beam 1 [dB] ddd.d...
  • Page 69 Figure Of Merit Beam1 ddddd FOM2 Figure Of Merit Beam2 ddddd FOM3 Figure Of Merit Beam3 ddddd FOM4 Figure Of Merit Beam4 ddddd Quality Status: String with status letters: G, M or D or -: © 2024 Nortek Netherlands B.V. v2.9.
  • Page 70 Signature VM Coastal & Ocean - Manual (G)ood, (D)egraded, (M)issing or '-' for not enabled. Example: GGDGGM-G Character nr Measurement Source Position GNSS Heading GNSS Speed over Ground GNSS Time GNSS Heading Pitch Roll GNSS Bottom track Signature (G or M)

  • Page 71: Compliant Nmea

    ($PNRT); deselect this tickbox ("no") to use the historical mnemonic code ($PNOR), for compatibility (but note that this code is not registered to Nortek, hence using this code is not compliant; see also section "Proprietary NMEA sentences " for details,...

  • Page 72: Installation

    Signature VM Coastal & Ocean - Manual Installation Instrument orientation When mounting the Signature sensor to the vessel it is important to note the orientation. As shown in figure , the ‘X’ is not pointing straight forward, but 45 degrees off the centre line.

  • Page 73: Grounding

    Most of these mounting arrangements are designed so the Signature sensor will be mounted over the side. It is important that the mount is rigid so that the orientation of the Signature sensor does not change over the course of the survey. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 74: Figure 63: Over-The-Side Mounting Pole

    Signature VM Coastal & Ocean - Manual Note that the relative orientation of the Signature sensor as referenced to the GNSS coordinate system should remain unchanged over the survey. Mounting systems that use a separate, towed catamaran or other towed body are not suitable unless the GNSS antenna is also mounted on the towed body.

  • Page 75: Gnss Mounting

    To attach the antenna to the mounting pole, first put the nut and the plastic ring on the thread, then screw on the antenna. Point the antenna so it is in line with the ship’s main axis and fix it in position using the nut. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 76: Figure 66: Gnss Mounting Bracket

    Signature VM Coastal & Ocean - Manual Figure 66: GNSS mounting bracket Figure 67: Mechanical drawing of GNSS Compass v2.9. © 2024 Nortek Netherlands B.V.

  • Page 77: Figure 68: Gnss Ethernet Cable

    Installation Figure 68: GNSS Ethernet Cable © 2024 Nortek Netherlands B.V. v2.9.

  • Page 78: Maintenance

    10.3 Instrument Care All Nortek instruments are intended for use in water. Other fluids may have an adverse effect on the plastic materials used. For prolonged storage at elevated temperatures close to the specified limit, or when temperature variation is uncertain, it is recommended that the screws v2.9.

  • Page 79: Connector Care

    Ensure that the cable is fixed to the mounting fixture to avoid mechanical stress to the connection. · Elastomers can be seriously degraded if exposed to direct sunlight or high ozone levels for extended periods. © 2024 Nortek Netherlands B.V. v2.9.

  • Page 80: Triggering And Time-Synchronization

    To use the PTP or NTP option, an appropriate time-source needs to be available on the network. The Advanced Navigation GNSS that is part of the Nortek VM Coastal system functions as a PTP clock-source. Note that for both Triggering and for Clock source, the contents of the Connect Dialog will change depending on the selections you make.

  • Page 81: Ping-Based Triggering (Signature Triggering)

    "RS485EDGE trigger must be used with this option. This enables several instruments to be synchronized together through RS485 with one of the instruments acting as master. Only continuous measurement configurations are supported in this mode, and all synchronized © 2024 Nortek Netherlands B.V. v2.9.

  • Page 82: Signature Triggering: Rs-485 Options

    Signature VM Coastal & Ocean - Manual AD2CP instruments must be of the same frequency and have the same deployment configuration." 11.1.1.3 Signature Triggering: RS-485 options Figure 71: RS-485 trigger signal details An RS-485 signal can be used to trigger the Signature, either Rising Edge, Falling Edge or Both Edges of a RS-485 Signal.

  • Page 83: Hardware Trigger

    Signal Signal level selection from drop-down box High Trigger Trigger on the rising edge Trigger on the falling edge Busy High voltage indicates the Low voltage indicates the system is busy system is busy © 2024 Nortek Netherlands B.V. v2.9.

  • Page 84: Software Trigger

    Signature VM Coastal & Ocean - Manual Notes · The voltage levels are RS-232 levels: high voltages between +3 and +15 V, low voltages between -3 and -15 V. · The software and this manual do not refer to the RS-232 logic 0 and logic 1 levels. (Where we mention "a high level in terms of voltage", we do mean +3 ..

  • Page 85: Time Synchronization

    The PC running the VM software can be configured as NTP server. For more information see: Use Windows 10 as NTP Server – Nortek Support Center (nortekgroup.com). For an external NTP server the IP address of the Server needs to be supplied (see figure ).

  • Page 86: Spectrum

    Signature VM Coastal & Ocean - Manual Spectrum For noise interference troubleshooting the software allows you to record a frequency spectrum. This can be used when you notice issues with the data received from the Signature instrument to further narrow down the issue.

  • Page 87: Interaction

    Signature 1000 instrument. The noisy spectra are polluted with a 50 kHz square wave from about halfway through the recording, the clean spectra show little pollution. Table 8: Example spectra Bandwidth Clean Noisy Narrow Broad © 2024 Nortek Netherlands B.V. v2.9.

  • Page 88: Replaying A Recorded Spectrum

    Signature VM Coastal & Ocean - Manual Bandwidth Clean Noisy Ultra Full A clean spectrum should have a well defined peak around the instrument frequency with a low noise floor and show no changes over time. The noisy spectra in table show narrow peaks at multiples of the introduced frequency of 50 kHz.

  • Page 89: Troubleshooting

    13.1 Remote Support through TeamViewer In general, every Signature VM computer comes with TeamViewer software. This allows the user to give a Nortek support engineer access to the computer so he or she can check what might be wrong with your software configuration.

  • Page 90: Communication

    Signature VM Coastal & Ocean - Manual 13.2 Communication The blue LED indicator light on the instrument is not lit · Is the instrument in Command mode? · Does the LED blink (short) when applying power? Cables are often exposed to heavy use and the power connector might break. Using a multimeter to ping through each pin may reveal a breakage.

  • Page 91: Computer Configuration

    If a remote desktop connection is required from the rest of the network, you should disable this rule. Click the Windows key and type ‘Firewall’. In Firewall, select ‘Inbound Rules’, and find the settings for ‘Remote Desktop – User mode (TCP-in)’ and ‘Remote Desktop – User mode (UDP- in)’ © 2024 Nortek Netherlands B.V. v2.9.

  • Page 92: Figure 81: Firewall Configuration For Remote Desktop

    Signature VM Coastal & Ocean - Manual Figure 81: Firewall configuration for Remote Desktop To change the settings, double-click on the settings, and, on the tab 'Scope', change the Local IP address to ‘Any Address’. Click OK to confirm, and repeat for the other setting as well.

  • Page 93: Gnss

    The use of the NTRIP client requires that the system is connected to the internet. To test if it is working, use the server at ‘www.rtk2go.com’, port 2101 as shown in the example in figure . This is a cloud service that provides free transfer of data from any base station. Most of © 2024 Nortek Netherlands B.V. v2.9.

  • Page 94: Network Settings For Using Ntrip - Rtk

    Signature VM Coastal & Ocean - Manual them are just private stations which will often be offline, but the ‘Get Mountpoints’ function will work and fill the drop-down list with available stations. The standard version of the GNSS will only use the DGPS information for increased accuracy, but the HA (High Accuracy) version requires NTRIP data to get to a RTK fix.

  • Page 95: Figure 85: Configuration For Network Sharing

    GNSS Figure 85: Configuration for network sharing © 2024 Nortek Netherlands B.V. v2.9.

  • Page 96: Glossary

    Signature VM Coastal & Ocean - Manual Glossary Accuracy A value giving the degree of closeness of a velocity measurement to the actual velocity. Refer to the data sheet for specific minimum accuracy. AD2CP Nortek's broadband signal processing platform. AHRS Attitude and Heading Reference System.
  • Page 97 Firmware Internal software of the instrument, as opposed to the instrument software running on a PC. New firmware is posted on the Nortek site. You will need to register to get access, but access is otherwise free of charge.
  • Page 98 Signature VM Coastal & Ocean - Manual Sampling rate Specifies the rate at which data is output SDU Coordinates Speed - Direction - Up. Sidelobe The acoustic beams focus most of the energy in the centre of the beams, but a small amount leaks out in other directions. Transducer sidelobes are rays of acoustic energy that go in directions other than the main lobe.

  • Page 99: Connector Pin Configurations

    RS422 Rx+ RS422 Rx- Orange Purple Sync A White Blue 2-Pin Terminal block Sync B Green Black *) GND on pin 1 on instrument side, pin 5 on DSUB and on Jack Plug (jacket) © 2024 Nortek Netherlands B.V. v2.9.
  • Page 100 Figure 56: Aligning for bottom track .................... 58 Figure 57: Enabling data output ....................59 Figure 58: NMEA message options ....................60 Figure 59: Output destination options ..................61 Figure 60: Configuration options for different output destinations ........... 61 v2.9. © 2024 Nortek Netherlands B.V.
  • Page 101 Table 7: Possible settings for the hardware trigger ................ 83 Table 8: Example spectra ......................87 Table 9: 6-pin connector, Stand alone, Ethernet (N2550-003, N2550-008) ........99 Table 10: 8-pin connector, Serial communication, RS232 and RS422 (N2550-001) ......99 © 2024 Nortek Netherlands B.V. v2.9.

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