YIC Technologies EMScanner User Manual
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YIC Technologies EMScanner User Manual

High speed real-time emc/emi diagnostic tool
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EMScanner
User Manual
V01/0912
www.yictechnologies.com

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Summary of Contents for YIC Technologies EMScanner

  • Page 1 EMScanner User Manual V01/0912 www.yictechnologies.com...

  • Page 2: Safety Notices

    YIC Technologies shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or any information contained herein.

  • Page 3: Minimum System Requirements

    About the EMScanner Products EMScanners product family provides board-level design teams with world-leading fast nearfield magnetic data to help diagnose EMC design issues. EMScanner product line consists of EMScanner, EMScannerR+ and EMProbe, these instruments capture and display visual images of spectral and spatial scan results in seconds. This allows the design team to immediately analyze and compare design iterations.
  • Page 4 Technical Support To help us provide fast and seamless technical support, kindly gather the following information and contact Technical Support as instructed further below: 1. Serial number of your unit. 2. Software and firmware versions: 3. Windows OS information 4. Keysight IO version 5.
  • Page 5 Cables & Component Checklist Components Supplied with the EMScanner System Scanner board EMScanner The adapter controls the EMScanner Adapter RF SMA to type It is referred as the RF cable in this manual. It connects the scanner to the N coaxial cable...

  • Page 6: Options And Accessories

    EMScanner (see Supported Spectrum Analyzers). It measures the radio frequency (RF) signal received from the EMScanner, generated by the very-near-field emissions of an adjacent activated PCB and it outputs the data to the PC. Most Keysight`s and R&D`s models are supported.

  • Page 7: Connection Diagram

    3. Connect PC, scanner, adapter and spectrum analyzer as per the diagram below. If you are using Ethernet between the PC and the spectrum analyzer, use a crossover Ethernet cable. If the spectrum analyzer has multiple trigger ports, always connect to Trigger 1 IN. Connection Diagram Hardware Setup 1.
  • Page 8 EMScanner and Adapter ports 1. SMB external trigger cable port 2. LED light shows three stages: Red: Boot mode (this stage is fast; you may not even notice it) Orange: Initiation mode (checking adaptor’s firmware) Green: User mode (adaptor is connected and ready) 3.

  • Page 9: Software Installation

    Software Installation 1. Plug-in the EMScanner USB drive. Select the software folder and double click on Setup.exe file 2. When you are prompted “Do you want to allow the following program from an unknown publisher to make changes to this computer” click Yes 3.
  • Page 10 LAN Connection Step 1 - Spectrum Analyzer Setup • In order to make Technical Support easier, the IP address of the analyzer must be set to the default IP 172.16.1.148 and the PC’s at 172.16.1.99. • Please check Technical Bulletin #9 if you have a Keysight spectrum analyzer. Step 2 - PC Setup •...
  • Page 11 • Click Finish • When you first connect to the spectrum analyzer open Keysight Connection Expert • Keysight IO will automatically detect the spectrum analyzer and display the analyzer model. If it doesn’t click Rescan. If it still doesn’t detect the analyzer, click Manual Configuration.
  • Page 12 • Select LAN instrument and enter the IP address: 172.16.1.148 and click Accept. • Click Instruments tab to see that spectrum analyzer is successfully detected. It has to be a “favourite” to operate and must have a yellow star. www.yictechnologies.com...
  • Page 13 Step 3 – EMScanner Software The software automatically detects the spectrum analyzer. Turn on the spectrum analyzer, connect it to the PC and start the EMViewer software. As soon as the EMViewer software is launched, two messages are displayed at the bottom of the screen.
  • Page 14 EMScanner does not require a special setup like a shielded room; the Device Under Test (DUT) may sometimes however pick up strong ambient signals like those present in the cell band (850 MHz -2100 MHz) or radio FM band.
  • Page 15 Cables from and to the PCB can be tested for emissions. Place the DUT on the scanner and tape the cables on the scanner or simply tape only the cables on the scanner. 4. System testing EMScanner will help detect any leakages from a system under test for both frequency and location. 5. In situ testing EMScanner is light and compact.
  • Page 16 Menu Bar Menu Bar is shown below. It allows the user to start a project node, to select a scan type, to start a single scan, to scan continuously, and to stop a scan, as well as to specify scan settings.
  • Page 17 Spectral node is added to the project file. By default, Project View is pinned and displayed in the EMScanner software. In order to maximize the space to view the scan results, Project View can be hidden. Click the pin icon to auto hide Project View.

  • Page 18: Viewing Scan Results

    Viewing Scan Results Depending on the scan type, you can view the scan results in either spectral or spatial or both views. Spectral View The name of the scan is on the top of the graph. Below the name is the scan type, scan frequencies, minimum and maximum amplitudes of this span, LNA or Attenuator values used, patented scanner model and date and time of the scan.
  • Page 19 Spatial View The name of the scan is on the top of the graph. Below name is the scan type, scan frequency, minimum and maximum amplitudes of this frequency, LNA or Attenuator values used, patented scanner model and date and time of the scan. Mouse over the graph to display row / column coordinates, frequency and amplitude values.
  • Page 20 View can be changed to 3D by clicking on the check box. You can rotate the 3D view by left clicking on the graph and moving the mouse. When Overlay is checked in 3D view, the wheel of the mouse will adjust the transparency. But if you press Ctrl key and then use the wheel you can move up and down the overlay to have the tip of the peaks right at the DUT level.
  • Page 21 Left click and drag to zoom in. Right click and select Reset Zoom to return to the original view or Previous Zoom to return to the previous zoom level. www.yictechnologies.com...
  • Page 22 Right click on the graph to display menu. Selecting Open Scan Data Description will give information about the scan. If you select Edit Overlay you can change the Overlay post-scan to, for example, match the emissions with the Gerber of different layers instead of the usual Bottom or Top layer. Or you could correct the position of the Overlay You can select a block of cells on your current spatial scan and then, by clicking on Confirm Selected Cells for New Scan, the Spatial Scan Probes settings have automatically been changed to these highlighted cells.
  • Page 23 Nodes All scan types in a project are called nodes. A project is the root node. It can be considered a folder like in Windows directories to store related data. You can add different types of scans and/or notes to a project node. You can rename, copy and paste a node or node settings only.
  • Page 24 How to Name a Node? To name a node open the Settings of the node and click on the “Description” tab. When you add a node for the first time, the Settings window opens automatically. If you want to rename a node after you add the node, either right click on the node and select Settings or select the node and then click the Settings button on the task bar.
  • Page 25 Although the EMScanner software detects the spectrum analyzer automatically, you can override it by manually selecting the spectrum analyzer from the drop-down menu. If you connect a different spectrum analyzer after the EMScanner software is launched, EMScanner software will not recognize the connection. EMScanner software must be relaunched to establish the connection between the spectrum analyzer and the PC.
  • Page 26 Display Options Tab Letters/Numbers: EMScanner columns are indicated by letters and all prior models’ columns are indicated by numbers. Check box Display Letter for Scanner for the software to display columns with letters to match your scanner grid format. Colour Spectrum: Colour options for the spatial display.
  • Page 27 Replace Data When Running Continuously: If you Scan Continuously when this option is checked, EMScanner software replaces the previous scan data and keeps the last scan data. In order to keep all scan data, uncheck this option.
  • Page 28 Once you import the design file, you can rotate or mirror it, and/or drag it to a software. Please desired position. JPG needs to be rotated and mirrored outside the EMScanner contact Y.I.C. application to match the actual DUT size and orientation; it can be resized Technologies for inside the Overlay Editor.
  • Page 29 Once the file is imported, a window as shown below will open. You need to position the image to match the actual DUT position on the EMScanner. Precise positioning of Gerber or picture is done with Arrow keys. You can resize the JPG file by left clicking and dragging the bottom right corner of the image (red/green/blue coloured corner).
  • Page 30 Thumbnail view of the files is listed on the left-hand column. Right click on any image to Select to view it on the grid view or to Delete it from the thumbnail view. Spatial Scan Tab Enter Center Frequency manually or select it from the Peak Marker List. The Center frequency will be set automatically to the chosen frequency RBW (Resolution Bandwidth): It is set by default at 120kHz and can be reduced to the lowest level allowed by the spectrum analyzer.
  • Page 31 Replace Data When Running Continuously: If you Scan Continuously when this option is checked, EMScanner software replaces the previous scan data and keeps the last scan data. In order to keep all scan data, uncheck this option.
  • Page 32 DUT. Amplitude Adjustment Tab You can use an LNA or attenuator with EMScanner to increase or decrease the power level of the signals coming from the scanner and going to the spectrum analyzer. To activate, click on Amplification Setting or Attenuator Setting and then select the value from the drop-down menu or type the value.

  • Page 33: Report Generator

    Description Tab You can name the node and add a description. Report Generator The Report Generator Node allows the user to generate standard scan reports by exporting the scans into Microsoft Office Word for Windows report template. Report generator needs Microsoft Office Word. To create a report, add Report Generator node to any node.

  • Page 34: Scan Types

    You can select any scan and any data of that scan to generate the report. Scan Types There are four scan types: • Spectral Scan: measures and displays the maximum amplitude vs. frequency of the magnetic field strength over the scanned area. •...
  • Page 35 To run a scan: 1. Place the PCB or other device under test (DUT) on the patented scanner 2. Select the scan type on EMScanner software 3. Run the scan Power up the PCB or DUT and place it on the scanner aligning as closely as possible to the vertical and horizontal guidelines.
  • Page 36 7. Replace Data When Running Continuously: If you Scan Continuously when this option is checked, EMScanner software replaces the previous scan data and keeps the last scan data. In order to keep all scan data, uncheck this option.
  • Page 37 20% to 30% of the probes selected. Amplitude Adjustment Tab You can use an LNA or attenuator with EMScanner to increase or decrease the power level of the signals coming from the scanner and going to the spectrum analyzer. To activate...
  • Page 38 When running the scan continuously, if Replace Data When Running Continuously in the Spectral Scan settings is selected, the EMScanner software replaces the previous scan data and keeps the last scan data. You will only see the last scan data and display the spectral graph of this data.
  • Page 39 Spectral Scan/Spatial Scan A Spectral/Spatial Scan measures the magnetic field strength of radiated electromagnetic emissions from an object as a function of both frequency and position on the PCB. The Spectral/Spatial Scan collects a series of Spatial Scans over the entire frequency range of interest as opposed to a Spatial Scan (which gathers data at single frequency) or a Spectral Scan (which saves only the composite maximum data set over the scan area).
  • Page 40 Decreasing the bandwidth will improve the amplitude accuracy and increase the sensitivity; the scan will however take more time to complete. The bandwidth you choose should not be disproportionate to the span. The suggested ratio of Span/RBW should be <10,000 e.g. 10 kHz bandwidth with a 100 MHz span, 100 kHz bandwidth with a 1 GHz span so that the scan can finish in a reasonable time.
  • Page 41 DUT. Amplitude Adjustment Tab You can use an LNA or attenuator with EMScanner to increase or decrease the power level of the signals coming from the scanner and going to the spectrum analyzer. To activate click on Amplification Setting or Attenuator Setting and then select the value from the drop down menu or type the value.
  • Page 42 To run the scan, click. Once the scan is completed, a spectral view and a spatial view will be displayed. By default, view tabs are set to full composite spectral and spatial views for the entire selected frequency. www.yictechnologies.com...
  • Page 43 Full Composite Spectral View Composite Spectral looks like a normal Spectral Scan however it is a gateway to archived spatial data for each frequency. You can select single or multiple frequencies on the Composite Spectral view to analyze the location of them on the board. Select Full Composite View under spectral graph and User Composite View under spatial view.
  • Page 44 Select multiple frequencies of interest on spectral graph. A red cross will indicate the selection. Spatial graph will update to display the emissions on the board at the selected frequencies. Selected frequencies will be displayed under Freq List (Frequency List) next to the spatial graph.
  • Page 45 Delta Marker It displays the amplitude and frequency difference between the current mouse position and the delta marker position in the frequency spectrum viewed. 1. Select either Full Composite View or User Composite View on spectral graph 2. Right click on the spectral view 3.
  • Page 46 5. To clear delta markers, right click on the spectral graph and select Clear Selected Delta Marker Full Composite Spatial View Composite Spatial looks like a normal Spatial Scan; it however is a gateway to the archived spectral data for each frequency. You can select single or multiple cells on the Composite Spatial view to analyze their amplitudes and frequencies.
  • Page 47 Multi Frequency Marker Right click on the spatial graph and select Multi-Cells Select. Select multiple cells of interest on spatial graph. A cross will indicate the selection. Full/User Composite View tab overlays spectral graph of user selected cells on to the full spectral graph. Spectral graph of the selected cell will be displayed in green on the spectral graph.
  • Page 48 User Composite View tab displays the spectral graph of user selected cells. To clear frequency markers, right click on the spatial graph and select Clear Selected Frequency Marker. www.yictechnologies.com...
  • Page 49 Description Tab You can name the node and add a description. Click OK. To run the scan, close the settings and run once. Immediately upon running the scan you see a message describing where you need to position the handheld probe. www.yictechnologies.com...
  • Page 50 Spectral Overlay A Spectral Overlay is a qualitative comparison of two frequency spectra. It displays two data sets superimposed on each other, which allows you to visually inspect data for differences, i.e. presenting a qualitative view. The Spectral Overlay node allows you to observe and compare two Spectral Scans with the same resolution bandwidth within their common overlapping range overlapping frequency range even though they may have different frequency ranges e.g.: Spectral 1: 10 MHz - 80 MHz and Spectral 2: 30 MHz - 120 MHz.Add Spectral Overlay node to Project node.
  • Page 51 Spectral Comparison A Spectral Comparison is a quantitative comparison between two frequency spectra. It is generated by subtracting the values of one spectrum (Test View) from the values of the second spectrum (Reference View) at each frequency. The Compare Spectral node allows you to observe and compare two Spectral Scans with the same resolution bandwidth within their common overlapping range even though they may have different frequency ranges e.g.: Spectral 1: 10 MHz - 80 MHz and Spectral 2: 30 MHz - 120 MHz.
  • Page 52 against it by linking them to the test node. Add Spectral Comparison node to Project node. Node settings window automatically opens. After you click OK, Spectral Comparison window opens. Go to the Spectral View. Select the data from the data list that you want to subtract from and click &...
  • Page 53 The Interleaved Scan is meant to overcome the limitations of the probe polarizations. Each of the 1218 probes on the EMScanner is created by using the vias and traces in a PCB to form a loop. This small loop does not respond well to magnetic fields parallel to it, essentially creating a blind spot.
  • Page 54 For EMScanner & EMScannerR+ Model Each of the 1218 probes on the EMScanner is created from two overlapping loops to increase their angular coverage. Even with this hybrid approach they do not have 360- degree coverage. There is one orientation of magnetic field that the probes do not respond to, essentially creating a blind spot.
  • Page 55 However, if the device has H-field components then every other row will have very low reception sensitivity. The scan results are shown below in the top right. Now if this device is rotated 90° then dead spots will switch to the alternate row. Although the high-level results are as expected, the presence of these low values distracts the eye.
  • Page 56 In certain situations, the presence of dead spots can create misleading results. An example of this is shown below. The image on the left shows a diagonal trace with one standard scan. The image on the right shows the same trace after two interleaved scans. Creating a Blind Spot Reduction Node 1.
  • Page 57 b. Run the first spatial scan: Place the DUT on the scanner at the desired position. This position should align with the Gerber file overlay. Run the first scan. c. Run the second spatial scan: After the first scan, a message box will pop-up indicating to move the DUT up by exactly 1 row.
  • Page 58 Spatial Comparison Spatial Comparison is a quantitative comparison between two Spatial Scans that is generated by subtracting the values of the first scan (Test View) from the values of the second scan (Reference View) cell by cell. The Spatial Comparison node allows you to see the difference between two Spatial Scans at the same frequency.

  • Page 59: Measurement Tips

    Select the data from the data list of the Spatial Scan that you want to subtract from and click & drag & drop it on to Test View. Repeat these steps for the second data and drop it on to Reference View.
  • Page 60 RBW in the 120 kHz to 10 kHz range as it provides you with more immediate feedback. EMScanner has the capability of scanning all 1218 probes at a large span and a tight RBW but such scans can take a long time to complete.
  • Page 61 If you already have visited a compliance facility and have a report, it is a good idea to include this data in the notes and conduct the EMScanner scans at the same frequencies. There will be differences in the far-field and near-field values, but they will be relative.
  • Page 62 On rare occasions, a Gerber file may not be in a pure RS-274x format and cannot be read by EMScanner software. This file can often be read by a third-party Gerber reader such as GerbView and converted to an RS-274x format that can be used. GerbView can be obtained at http://www.softwarecompanions.com/.
  • Page 63 Therefore, by decreasing the span, the user can increase the frequency accuracy. Since EMScanner final rescan for peak detection is set at a span of 5 x RBW, reducing the RBW has the effect of improving the frequency accuracy.
  • Page 64 Sensitivity: -130 dBm to 35 dBm (Dependant on spectrum analyzer performance) (* 40 dB LNA; ** 38 dB Power amplifier) 10.I added a low noise amplifier (or an attenuator) between the EMScanner and the spectrum analyzer and forgot to enter the value in the Amplitude Adjustment menu.
  • Page 65 RBW if you want to improve the accuracy of the measurements. 12.Why does the peak marking process take longer than the estimated time? EMScanner build a peak list initially during the Spectral Scan. Then it goes back to each peak and zooms in to make a more accurate measurement.
  • Page 66 If the compensation is set to ON in the setting, then this results in the EMScanner software viewer and the SA not showing the same magnitude in a spectral and spatial scan. The frequency of the peaks should be the same in either case.

  • Page 67: Appendix - Error Messages

    Appendix – Error Messages If you receive other error messages please contact Y.I.C. Technologies Technical Support: support@yictechnologies.com Appendix – Error Messages Safety and Regulatory Information The Spectrum Analyzer connected with an Ethernet cable to the Personal Computer (PC) must all together comply with CE emission requirements •...
  • Page 68 • This device was qualified under test conditions that included the use of the specified cables, between system components. To ensure regulatory and safety compliance, use only the provided power and interface cables and install them properly. • Different types of cord sets may be used for connections to the main supply circuit. Use only a main line cord that complies with all applicable device safety requirements of the country of use.
  • Page 69 FCC authorization to operate this product. CE mark EMScanner conforms to the following standards and other related normative documents: • Electromagnetic emissions: (Council Directive 2004/108/EC–EN61326-1 Ed 2.0 2012-07. CISPR 11:2009,A1:2010) FCC Part 15 B •...
  • Page 70 Y.I.C. Technologies is a world leading developer of FAST magnetic very-near-field measurement technologies and applications, providing real-time test solutions to antenna and PCB designers and verification engineers, without the need for a chamber. The EMScanner is a compact EMC and EMI diagnostic tool. Y.I.C. Technologies solutions dramatically increase designer productivity and substantially reduce time-to-market and project development costs.

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