<ul>
<li>
<p>
The power is off.
</p>
Consequently, the user is prompted with warning message as shown in Figure A-II.6.
Â
<center>[[Image:neoscanfig_A_II_6.png|thumb|center|400px|<i><b>Figure A-II.6</b>: Dialog window when Translation Stage is not responding.</i>]]</center>
Therefore,
If the problem persists, turn off the programmable motion controller and then turn it on. Then Disconnect the USB cable from the USB Hub port and then reconnect it again to the same port.
</ul>
<li>
It is important to note that failed to respond properly to this issue, it may cause the system to hung, in which you may restart the whole [[NeoScan]] system and control computer.
</li>
</ul>
Â
<center>[[Image:neoscanfig_A_II_6.png|thumb|center|600px|<i><b>Figure A-II.6</b>: Setting lock-in amplifier parameters in NeoScan Mapping Utility.</i>]]</center>
=== Translation Stage Has Hung Up
When the XY Linear Translation Stage hits the edge sensors of the base, it will hang up and stops functioning (see section A.4). In this situation,
⢠<ul><li><p>Reset the Linear Translation Stages by switching it off and then turning it on,</p></li><li><p>⢠Disconnect the USB cable from the USB Hub port and then reconnect it again to the same port.</p></li>A-II.7 Optimization Utility Program Not Functioning </ul>
=== Optimization Utility Program Not Functioning ===
[[NeoScan]] Optimization Utility program stops functioning if
⢠<ul><li><p>The Lock-in Amplifier is off.</p></li><li><p>⢠Or the Lock-in Amplifier is not connected to the [[NeoScan]] system through the USB Hub.</p></li><li><p>⢠Or GPIB address for the Lock-in Amplifier Visa is not correct.</p></li></ul>
Consequently, information panel warns that spectrum analyzer âNot Foundâ as shown in Figure A-II.7.
Â
<center>[[Image:neoscanfig_A_II_7.png|thumb|center|400px|<i><b>Figure A-II.7</b>: Dialog .</i>]]</center>
Therefore,
1. <ol><li><p>Check whether the Lock-in Amplifier is on.</p></li><li><p>2. Check if the GPIB-USB cable from the Lock-in Amplifier port is connected to the USB Hub (Figure AII-.8).</p></li><li><p>3. Disconnect the USB cable from the USB Hub port and then reconnect it again to the same port.</p></li></ol>
<center>[[Image:neoscanfig_A_II_8.png|thumb|center|400px|<i><b>Figure A-II.8</b>: Cor.</i>]]</center>
A-II.8 === Incorrect Working Folder (Directory)====
Make sure NoeScan Mapping Utility or [[NeoScan]] Plot Utility programs are pointing to the correct working folder (Figure A-II.9).
1<center>[[Image:neoscanfig_A_II_9. In NoeScan Mapping Utility use the browse button to set âWorking Folderâ png|thumb|center|600px|<i><b>Figure A-II.9</b>: Correct working or project and folder path to .</i>]]</center>
C:\Users\[[NeoScan|neoscan]]\Documents\[[NeoScan]]\Projects.<ol><li><p>2. In NoeScan Plot Mapping Utility use the browse button to set âProject âWorking Folderâ path to
C:\Users\[[NeoScan|neoscan]]\Documents\[[NeoScan]]\Projects.
</p>
</li>
<li>
<p>
In NoeScan Plot Utility use the browse button to set âProject Folderâ path to
C:\Users\[[NeoScan|neoscan]]\Documents\[[NeoScan]]\Projects.
</p>
</li>
</ol>
  A-II.9 === Irregular Patterns in 2D Phase Plots===
If there are irregular patterns in 2D Phase plots in [[NeoScan]] Plot Utility program, as shown in Figure A-II.10, it might be the case that there is no synchronization between scan instruments.
Â
<center>[[Image:neoscanfig_A_II_10.png|thumb|center|400px|<i><b>Figure A-II.10</b>: An example of irregular pattern in 2D Phase plot when scan instruments are not synchronized.</i>]]</center>
Therefore,
1. <ol><li><p>Make sure all 10 MHz reference cables are connected appropriately (in the back of the corresponding instruments) and the connectors are not loose. </p></li><li><p>Check if the BNC cables are fine. </p></li><li><p>Make sure âModulation Generatorâ key in 100 MHz signal generator for lock-in amplifier is off.</p></li></ol>
2. Check if the BNC cables are fine. === Wiggling Power Levels ===
3If the FC/APC connector is not clean (Figure A-II. Make sure âModulation Generatorâ key 11), despite probe optimization the return power and the optimization power graphs appears wiggling as shown in 100 MHz signal generator for lockFigure A-in amplifier is offII.12.
<center>[[Image:neoscanfig_A_II_11.png|thumb|center|600px|<i><b>Figure A-II.10 Wiggling Power Levels If the 11</b>: FC/APC connector is not of a PM Fiber under microscope: A dirt seen as a black mark on the fiber end connector (left). A clean fiber (right).</i>]]<br>[[Image:neoscanfig_A_II_12.png|thumb|center|600px|<i><b>Figure A-II.11), despite probe optimization the 12</b>: Wiggling return power and the optimization power graphs appears wiggling as shown in Figure A-II.12for a PM fiber with a dirt on the fiber end connector. </i>]]</center>
Therefore
1. <ol><li><p>Detach the fiber connector from fiber port of the [[NeoScan]] system.</p></li><li><p>2. Use a dry cleaning cloth (reel-based cassette cleaner) to remove dirt, dust, and oil from connector end faces (Figure A-II.13). </p></li><li><p>3. Attach the fiber connector to the fiber port of the [[NeoScan]] system.</p></li><li><p>Perform a probe optimization.</p></li></ol>
4<center>[[Image:neoscanfig_A_II_13. Perform a probe optimizationpng|thumb|center|600px|<i><b>Figure A-II.13</b>: Cleaning a connector end face using a dry cleaning cloth reel-based cassette cleaner</i>]]</center>
A-II.11 === [[NeoScan]] Optical Bench Manager Program Not Responding===
When the A/D and D/A convertor drivers are not detected by the system, NoeScan Optical Bench Manager program prompts a warning as shown in Figure AII-14. Or sometimes NoeScan Optical Bench Manager program does not respond.