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NeoScan Manual Part C: Near Field Mapping

1,028 bytes added, 20:40, 8 March 2017
/* Scan Control Page */
It is assumed that the scan parameters are set and the scan measurement setup has been setup. In order to start the scan, press “Scan Control” tab in [[NeoScan]] Mapping Utility program (Figure 4.13).
 
<center>[[Image:neoscanfig_4_13.png|thumb|center|600px|<i><b>Figure 4.13</b>: Scan Control Tap in NeoScan Mapping Utility Program.</i>]]</center>
 
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Press “Start Scan” button to start the scan.
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The program displays 2D Amplitude and 2D phase contour plots of the measured amplitude and phase during the scan, as shown in Figure 4.14. Graphs are rescaled continuously during the scan. This enables the users to monitor the status of the scan. For instance, any sudden change or any instrumental failure can appears as anomalous pattern in either 2D plots.
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The “Pause Scan” and “Stop Scan” buttons control the scan process. During scanning, use “Pause Scan” to pause temporarily the scanning. Pressing the “Stop Scan” button during scanning, will stop the scanning process.
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The “Plot Display?” key allows a user to display 2D Amplitude graph in dBm or μV unit. Similarly, “Current Signal” and “Current phase” in information panel present the lock-in amplifier current readings during the scan (Figure 4.15).
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[[Image:neoscanfig_4_14.png|thumb|center|600px|<i><b>Figure 4.14</b>: 2D Amplitude (in dBm unit) and 2D phase contour plots of the measured amplitude and phase during the scan.</i>]]
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[[Image:neoscanfig_4_15.png|thumb|center|600px|<i><b>Figure 4.15</b>: 2D Amplitude (in μV unit) and 2D phase contour plots of the measured amplitude and phase during the scan.</i>]]
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A user can check the “Elapsed Scan Time” and view the current X and Y position of the probe from the information panel (see Figure 4.16).
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During the scan, there is no access to other tabs or pages in [[NeoScan]] Mapping Utility program.
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When a signal falls below -150 dBm, a warning message appear in Information Panel indicates that “Detected a signal < -150 dBm in Ch 1 -- much below the noise level.” You may check the data later.
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  During The “Stop” button stops the application. To close (kill) the scan, there is no access to other tabs or pages in [[NeoScan]] Mapping Utility window click on exit button [[Image:icon_Stop.png]] on the top far right in the LabView user interface. To re-start running the programpress the start button [[Image:icon_Start.png]] located on the top left in the LabView window, see Figures 4.5 and 4.16.
When a signal falls below -150 dBm, a warning message appear in Information Panel indicates that “Detected a signal < -150 dBm in Ch 1 -- much below the noise levelcenter>[[Image:neoscanfig_4_16.” You may check the data laterpng|thumb|center|600px|<i><b>Figure 4.16</b>: A completed scan of a Patch Antenna by NeoScan system.</i>]]</center>
The “Stop” button stops the application. To close (kill) the [[NeoScan]] window click on exit button on the top far right in the LabView user interface. To re-start running the program press the start button located on the top left in the LabView window, see Figures 4.5 and 4.16.4.3 === The [[NeoScan]] Scan Data===
During each scan, both the magnitude and the phase of a particular electric field component at a plane are measured. When the scan is completed, data are written in .DAT files in your defined (created) project folder, say “patch_2.349GHz,” in the parent folder, i.e.
During a scan, data is collected and immediately displayed by [[NeoScan]] Mapping Utility program. However, data will be written into the files at the end of the scan.
<center>[[Image:neoscanfig_4_17.png|thumb|center|600px|<i><b>Figure 4.17</b>: Contents of data file E_X_Dir.DAT in patch_2.349GHz folder</i>]]</center>
 
== [[NeoScan]] Visualization Utility ==
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
[[NeoScan]] Visualization Utility
During each scan, both the magnitude and the phase of a particular electric field component at a plane are measured. Measured data can easily be interpreted and understood when displayed as 2D or 3D graphs. Visualization of the [[NeoScan]] scan data are realized by LabVIEW based programs. It plots the amplitude and the phase of the measured field distribution on a horizontal plane after the scan. [[NeoScan]] Visualization Utility includes three pages: Settings, Near Field Maps, and Far Field Patterns.
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