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YOKOGAWA AQ7420 User Manual
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YOKOGAWA AQ7420 User Manual

YOKOGAWA AQ7420 User Manual

High-resolution reflectometer
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User's
Manual
AQ7420
High-Resolution Reflectometer
IM AQ7420-01EN
1st Edition

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Summary of Contents for YOKOGAWA AQ7420

  • Page 1 User’s Manual AQ7420 High-Resolution Reflectometer IM AQ7420-01EN 1st Edition...
  • Page 2 Thank you for purchasing the AQ7420 High-Resolution Reflectometer. This instrument enables the measurement of optical return loss, burnout detection, and optical insertion loss of optical fiber cables and optical devices. This user’s manual explains the features, operating procedures, and handling precautions of the instrument.
  • Page 3 2.1 Yokogawa grants the Licensee, for the purpose of single use, non-exclusive and non-transferable license of the Licensed Software with the license fee separately agreed upon by both parties. Yokogawa allows the Licensee to use only one instance of the software for use on one device, whether that device is physical or virtual. If the Licensee want to use the software on more than one virtual device, the Licensee must obtain a separate Licensed Software for each instance.
  • Page 4 Article 6 (Liabilities) 6.1 If and when the Licensee should incur any damage relating to or arising out of the Licensed Software or service that Yokogawa has provided to the Licensee under the conditions herein due to a reason attributable to Yokogawa, Yokogawa shall take actions in accordance with this Agreement. However, in no event shall Yokogawa...
  • Page 5 IM AQ7420-01EN This document. Explains how to operate High-Resolution Reflectometer this instrument. User’s Manual For details on downloading manuals, see Request to Download AQ7420 Manuals (IM AQ7420- 73Z2). The “EN,” “Z1,” and “Z2” in the manual numbers are the language codes. IM AQ7420-01EN...
  • Page 6 Attire l’attention sur des gestes ou des conditions susceptibles de provoquer des blessures légères ou d’endommager l’instrument ou les données de l’utilisateur, et sur les précautions de sécurité susceptibles de prévenir de tels accidents. Note Provides important information for handling this instrument. IM AQ7420-01EN...
  • Page 7 Reference Measurement ....................4-4 DUT Measurement ....................... 4-14 Chapter 5 Analysis Description of the Analysis Window ................5-1 Marker and Cursor Operations ..................5-3 Chapter 6 Saving and Printing Data Saving and Loading Waveform Data................6-1 Printing Reports ......................6-3 IM AQ7420-01EN...
  • Page 8 List of Commands ......................7-6 IDWrite Group ........................ 7-8 LOGIn Group ........................7-9 LOGOut Group ......................7-10 MAIN Group ........................7-11 SETUp Group ....................... 7-13 Common Command Group ..................7-17 Appendix Appendix 1 Using Open Source Software ................App-1 Index IM AQ7420-01EN...
  • Page 9 AQ7420’s optical port and (2) display the position and intensity of RL incidents in the DUT on a graph. In addition, analysis can be performed using the marker feature.
  • Page 10 1.1 Overview PC application window Judgment result Measurement results displayed numerically Graph of waveform data IM AQ7420-01EN...
  • Page 11 The instrument measures the intensity of the reflected light caused by the open end of the master cord connected to the AQ7420 by measuring the return loss of the light signal output from the AQ7420’s built-in light source. This measurement serves as a reference for the distance measurement of the target device to be measured later and is a reference measurement with the open end of the master cord as the starting point (0 mm).
  • Page 12 1.2 Optical Return Loss (RL) Measurement Measurement result The result is displayed as RL value on the main window (see section 4.1). RL value IM AQ7420-01EN...
  • Page 13 (peak) can be detected at the break point of the target device. Here is an example of a fiber under test. Reflection (peak) detection Distance from the start point Start point (0 mm) Optical fiber under test Index Master cord Break Break Break RL measurement period (100 mm) IM AQ7420-01EN...
  • Page 14 AQ740023 sensor head from the connection end of the measured side of the AQ7420 master cord and the intensity of the light received when the DUT is connected between the connection end of the measured side of the master cord and the light detector of the AQ740023 sensor head.
  • Page 15 1.4 Optical Insertion Loss (IL) Measurement Measurement result The result is displayed as IL value on the main window (see section 4.1). IL value Index IM AQ7420-01EN...
  • Page 16 If the value of each measurement result exceeds the threshold value, a Fail judgment is made and the number of peaks exceeding the threshold value is displayed in red. Judgment result indicated by the color of the value IM AQ7420-01EN...
  • Page 17 (e.g., 4-B) can also be displayed. Value of the distance from the start point of the marker position, value of the reflection attenuation at the marker position, and each value between markers Index IM AQ7420-01EN...
  • Page 18 Fail detections recorded) measurement conditions information 1st Fail (distance, 2nd to 6th Fail RL value) (distance, RL value) Measurement Pass/fail judgment conditions conditions Measurement Measured value (RL, IL) conditions Product information Product information no. 1 no. 2 to 10 1-10 IM AQ7420-01EN...
  • Page 19 Measured value of wavelength 1.55 µm Distance mm Relative value dB Distance mm Relative value dB Recorded at Distance mm Relative value dB Distance mm Relative value dB specified resolution intervals Index Relative value dB Distance mm 1-11 IM AQ7420-01EN...
  • Page 20 PC application and can be printed as a summarized one-page report. If you change the print destination from a printer name to PDF, you can generate a PDF file. File information Setup information Measurement results (IL, RL, burnout detection) Burnout detection peak distribution display Fail judgment peak display 1-12 IM AQ7420-01EN...
  • Page 21 Use a logout command to log out. Alternatively, enable the local button in the remote condition settings on the Setup window to show a local button on the control PC during remote connection. Click it to disconnect. For setting remote conditions, see section 3.5. Index 1-13 IM AQ7420-01EN...
  • Page 22 Place the PC application CD supplied with the product in the CD-ROM drive. Installation begins automatically. If the following Windows message appears, click More info. A window appears showing more information. Click Run anyway. The installer runs. Index IM AQ7420-01EN...
  • Page 23 Click Next. A Choose Install Location window appears. Select the installation drive and folder, and click Install. The PC application installation begins. The default install location is C:\Program Files(x86)\Yokogawa\. When the installation is complete, a driver installation window appears. Click Extract.
  • Page 24 2.1 Installation Click Next. Read the license agreement thoroughly. If you agree, click I agree and then click Next. Click Done. Index IM AQ7420-01EN...
  • Page 25 2.1 Installation Click Finish to complete the installation. Yokogawa>OSA Viewer is added to the Windows Start > Programs menu, and a shortcut icon “AQ7420Series_OLCR” is created on the desktop. Uninstalling the software This section explains how to uninstall the software on Windows 11.
  • Page 26 When the software starts, the main window appears. Immediately after you start the software, the window that was shown immediately before the software was closed the last time appears. Start window Main window Index Exiting from the software Click x in the upper right of the window. IM AQ7420-01EN...
  • Page 27 Connection error or viewer mode • Connection error If the software fails to connect to the AQ7420 at startup, the Device Error window will appear. Make sure that the connection between the AQ7420 and the PC is correct, and then click Retry.
  • Page 28 Select the operation mode. Select from the three combinations of IL, RL, and Detection operation modes. Start position Select a setup file. Loopback image (See page 3-2.) Select a setup file stored in the PC. (See page 3-2.) IM AQ7420-01EN...
  • Page 29 Used for distance adjustment cords of any length. Distance adjustment cords of any length are options that can be used to inspect positions farther than 100 mm. The horizontal scale (distance) on the graph display shown on the main window of the PC application is shifted by the specified value. IM AQ7420-01EN...
  • Page 30 • When a value outside the setting range is entered or a required value is not entered, the value box color changes to pink. Check the setting, and enter an appropriate value. • See section 3.1 for a description of the setup window. IM AQ7420-01EN...
  • Page 31 When a measurement is started, the measurement is executed repeatedly under the set measurement conditions. Average duration (IL) The average duration for IL measurement can be set in three ways. Setting range: 0.1 s 0.8 s 6.5 s IM AQ7420-01EN...
  • Page 32 When the DUT is removed from the instrument, the IL measurement sensitivity is changed automatically to high sensitivity. When the next DUT is connected to the instrument, it will take a certain amount of time as the sensitivity will be automatically changed again. Index IM AQ7420-01EN...
  • Page 33 FAIL. Range: –120 to -10 dB Burnout detection threshold Set the threshold for the pass/fail judgment of burnout detection. If a value exceeding the threshold occurs, the result will be FAIL. Range: –120 to -10 dB IM AQ7420-01EN...
  • Page 34 IL display resolution Set the number of decimal places of the IL display. Range: 1/10, 1/100, 1/1000, 1/10000 RL stability area Set the range within which the connection position is corrected in stability mode. Range: –10 to 110 mm Index IM AQ7420-01EN...
  • Page 35 Set the file format for saving waveforms. Waveform Save Specify how to record waveform data. Note • See section 3.1 for a description of the setup window. Explanation Data save condition area Directory Set the directory where the data will be stored. IM AQ7420-01EN...
  • Page 36 Select the file format for saving the waveforms from CSV, BMP and Jpeg. Product Information You can enter the product information on the main window. Up to 17 characters are displayed in the report window. The entered characters are output in report format. Index IM AQ7420-01EN...
  • Page 37 Remote Setting Enable this to use remote control over TCP-IP. Local Key Display Enable this to show a connection release button on the window during remote control. Receive Port Number Set the port number for remote control. 3-10 IM AQ7420-01EN...
  • Page 38 11 All REF button Performs all IL, RL, and Detection reference measurements. The date and time the reference measurement was last performed is displayed on the right. This function is not available in Detection mode or IL mode. IM AQ7420-01EN...
  • Page 39 SETUP window. 15 Setup file name Shows the name of the selected setup file. You can change the setup file here. 16 Measurement condition Shows the measurement conditions entered on the setup window. display IM AQ7420-01EN...
  • Page 40 DSF fiber (1.55 µm zero dispersion) measurements at a wavelength of 1.55 µm are not affected by the wavelength dispersion of the optical fiber cable, but measurements at a different wavelength of 1.31 µm are affected. IM AQ7420-01EN...
  • Page 41 Connect one end of the relay cord to the instrument’s test port. Connect the other end of the relay cord to one end of the FC adapter. Connect the other end of the FC adapter to the IN end of the master cord (PC polished). IM AQ7420-01EN...
  • Page 42 • When Start Position is changed on the setup window (when a distance adjustment cord is connected) Click OK. A reference measurement (step 1) is executed. The instruction window will automatically close when the reference measurement is finished. Index IM AQ7420-01EN...
  • Page 43 Connect the other end of the FC/APC adapter to IN end of the master cord. Connect the OUT end of the master cord to the optical input port of the sensor head. Test port Reference port (OUT) Relay cord Distance adjustment cord FC/APC adapter (IN) Master cord (PC polished) IM AQ7420-01EN...
  • Page 44 • When Start Position is changed on the setup window (when a distance adjustment cord is connected) Click OK. A reference measurement (step 1) is executed. The instruction window will automatically close when the reference measurement is finished. Index IM AQ7420-01EN...
  • Page 45 Connect the other end of the relay cord to one end of the FC adapter. Connect the other end of the FC adapter to the IN end of the master cord (PC polished). Test port Reference port Open (OUT) Relay cord Distance adjustment cord FC/APC adapter (IN) Master cord (PC polished) IM AQ7420-01EN...
  • Page 46 Remove the master cord (PC polished) from the FC/APC adapter, replace it with a master cord (Angled PC polished), and reconnect. Test port Reference port Open (OUT) FC/APC adapter (IN) Master cord (Angled PC polished) Click OK of the displayed operation guide (STEP2). The second reference measurement is executed. Index IM AQ7420-01EN...
  • Page 47 • Perform a reference measurement when you make any of the following changes. • After a warm-up • FC/APC adapter replacement • Master cord replacement • Distance adjustment cord replacement • When Start Position is changed on the setup window (when a distance adjustment cord is connected) 4-10 IM AQ7420-01EN...
  • Page 48 Connect the other end of the FC/APC adapter to IN end of the master cord. Connect the OUT end of the master cord to the optical input port of the sensor head. Test port Reference port Index (OUT) Relay cord Distance adjustment cord FC/APC adapter (IN) Master cord (APC polished) 4-11 IM AQ7420-01EN...
  • Page 49 • When Start Position is changed on the setup window (when a distance adjustment cord is connected) Click OK. A reference measurement (step 1) is executed. The instruction window will automatically close when the reference measurement is finished. 4-12 IM AQ7420-01EN...
  • Page 50 PC polished master cord, replace with an Angled PC polished master cord, and perform the second reference measurement. ALL REF function IL REF and Detection REF are executed simultaneously. Index 4-13 IM AQ7420-01EN...
  • Page 51 Main window (see section 4.1) Serial number MEASURE RL, burnout detection measurement Connect the OUT end of the master cord to one end of another FC adapter you prepared. 4-14 IM AQ7420-01EN...
  • Page 52 Undoes or redoes graph movement and zoom. Marker move buttons Moves a selected marker. Zoom buttons Zooms in or out of the displayed waveform. DEFAULT SCALE button Resets the graph display to the default value specified in SETUP. IM AQ7420-01EN...
  • Page 53 Reflection result display and graph display areas The RL value and the distance from the start point are displayed for the peaks exceeding the threshold. Markers are displayed at the peaks that exceed the threshold. Burnout detection threshold Example: –90 dB IM AQ7420-01EN...
  • Page 54 Click the graph display area. A vertical cursor appears at the clicked position. Click on the destination of the cursor. The cursor moves to that position. Vertical cursor Drag Drag within the graph display area to move the graph display. Index IM AQ7420-01EN...
  • Page 55 Click the marker add button. A marker add menu appears. On the menu, click Marker. A message appears. Click the distance position where you want to place the marker. A marker is placed at the corresponding distance position on the waveform. IM AQ7420-01EN...
  • Page 56 5.2 Marker and Cursor Operations Marker add button Marker add menu Displayed message Click the distance on the waveform where you want to place the marker. The position and RL value of marker A Index Placed marker A IM AQ7420-01EN...
  • Page 57 On the menu, click Difference. A message appears for specifying the two markers. Move the mouse over the first marker. The marker is enlarged. Message for specifying two markers The marker is enlarged when the cursor is moved over it. IM AQ7420-01EN...
  • Page 58 Click the marker. This marker is used to find the Y value. The distance and RL value between markers A and B Index Note The distance and RL value between a marker and the waveform (peak) can also be displayed. IM AQ7420-01EN...
  • Page 59 In the marker/difference display area, right-click the marker information you want to clear. A marker clear menu appears. On the menu, click Clear. The marker on the waveform and the marker information in the marker difference display area are cleared. Marker clear menu IM AQ7420-01EN...
  • Page 60 After measurement, waveforms are automatically saved, so you do not need to perform any waveform saving operation. Note When Only NG Auto is selected, waveforms are saved only when the judgment results of the measured data are Fail. IM AQ7420-01EN...
  • Page 61 A month (e.g., 11) directory will be created in the year (e.g., 2024) directory, and a day (e.g., 15) directory will be created in the month directory. Format of measurement data (PS) and waveform data (PS) See section 1.6. IM AQ7420-01EN...
  • Page 62 Click Print. Measurement data is printed in report format on a single page and saved to a PDF file. Explanation When generating a PDF file, specify a file name. See section 1.6 for a description of the report format. Index IM AQ7420-01EN...
  • Page 63 If the command is correctly recognized, “OK” is returned. Note • If the command is not correctly recognized, “Invalid Command” is returned. • For the command syntax, see section 7.3. • All commands should be in plain text (unencrypted strings). IM AQ7420-01EN...
  • Page 64 Enter the administrator ID change command in the command input screen of the terminal software. :IDWrite:ADMin<wsp>yokogawa,123456789 If the command is correctly recognized, “OK” is returned. In the input example of the data above, the ID is “yokogawa” and the password is “123456789.” Note The default ID and password are as follows: ID: reflectometer...
  • Page 65 Commands that are defined in IEEE 488.2-1992 are called common commands. The header format of a common command is shown below. Be sure to include an asterisk (*) at the beginning of a common command. <Mnemonic> *CLS Common command example IM AQ7420-01EN...
  • Page 66 Example “ IDWrite ” can also be written as “ IDWR ” or “ IDW .” • The question mark at the end of a header indicates that it is a query. You cannot omit the question mark. Example The shortest abbreviation for “ :SETUp:MEASure:STARt? ” is “ :SETU:MEAS:STAR? .” IM AQ7420-01EN...
  • Page 67 • Integer (example: 0, 10) • Sign (example: <, ≤) • Decimal (example: 1.31, 1.55) • Floating-point number (example: -5.00000000E+001) <”string”> User-defined string (variable) (example: yokogawa, user) The unit of distance is mm, and the unit of RL is dB. Index IM AQ7420-01EN...
  • Page 68 Sets or queries the threshold for the RL (return loss) judgment conditions. 7-15 :SETUp:CRITeria:RSTArt Sets or queries the start position of the RL (return loss) judgment range. 7-15 :SETUp:CRITeria:RSTOp Sets or queries the end position of the RL (return loss) judgment range. 7-15 IM AQ7420-01EN...
  • Page 69 Returns ASCII code 1 if the wait for execution has ended. 7-17 *RST(ReSeT) Initializes the settings. All ongoing processes are stopped. Clears the *OPC? 7-17 command. *WAI(WAIt) Holds the execution of the subsequent command until all waiting states are 7-17 completed. Index IM AQ7420-01EN...
  • Page 70 Description This command is valid when logged in with administrative privileges. :IDWrite:ADMin Function Sets the login administrator ID and password. :IDWrite:ADMin<wsp><”string”>, Syntax <”string”> First <”string”>: administrator ID Next <”string”>: password :IDW yokogawa,1234567890 Example Description This command is valid when logged in with administrative privileges. IM AQ7420-01EN...
  • Page 71 Performs a login. :LOGIn<wsp><”string”>,<”string”> Syntax First <”string”>: administrator ID or user ID Next <”string”>: password Example :LOGI user1,abcdefg Description If you log in with an administrator ID, you can execute commands that are enabled with administrator privileges. Index IM AQ7420-01EN...
  • Page 72 LOGOut Group :LOGOut Function Performs a logout. :LOGOut Syntax Example :LOGO 7-10 IM AQ7420-01EN...
  • Page 73 When the instrument is in the middle of a <”string”>: product information string :MAIN:INFO1 yokogawa measurement, the instrument stops the Example measurement. :MAIN:INFO? -> yokogawa Description You can set up to 10 items for the product :MAIN:STOP information. Function Stops the instrument’s internal processing.
  • Page 74 Queries the Detection (burnout detection) value. :MAIN:RESUlt1|2:DETEct? Syntax 1: 1.31 2: 1.55 :MAIN:RESUl1|2:RLVAl? -> Example -5.00000000E+001 :MAIN:RESUlt1|2:MAIN? Function Queries the detailed data of Detection (burnout detection). :MAIN:RESUlt1|2:MAIN? Syntax 1: wavelength 1.31 µm 2: wavelength 1.55 µm :MAIN:RESUlt1|2:RLVAlue? -> Example -5.00000000E+001 7-12 IM AQ7420-01EN...
  • Page 75 0: main wavelength range. 1: sub wavelength Syntax :SETUp:MEASure:RLRAnge<wsp>0|1 2: main wavelength and sub wavelength :SETUp:MEASure:RLRAnge? :SETU:MEAS:WLEN 0 Example :SETU:MEAS:WLEN? -> 0 0: –14.7 to –85 dB 1: –50 to –100 dB :SETU:MEAS:RLRA 1 Example :SETU:MEAS:RLRA? -> 1 7-13 IM AQ7420-01EN...
  • Page 76 1: ≤ (greater than or equal to) :SETU:CRIT:ILCO1 1 ILCOndition1: wavelength 1.31 µm Example :SETU:CRIT:ILCO1? -> 1 ILCOndition2: wavelength 1.55 µm 0: < (greater than) 1: ≤ (greater than or equal to) :SETU:CRIT:ILCO1 1 Example :SETU:CRIT:ILCO1? -> 1 7-14 IM AQ7420-01EN...
  • Page 77 Sets or queries the Detection (burnout detection) automatically to the specified directory. judgment conditions. :SETUp:CRITeria:DECOndition1|2<wsp> Syntax :SETUp:CRITeria:DECOndition1|2? DECOndition1: wavelength 1.31 µm DECOndition2: wavelength 1.55 µm 0: < (greater than) 1: ≤ (greater than or equal to) :SETU:CRIT:DECO1 1 Example :SETU:CRIT:DECO1? -> 1 7-15 IM AQ7420-01EN...
  • Page 78 :SETU:DATA:WAVE 1 :SETUp:DATA:INFO1 yokogawa Example Example :SETU:DATA:WAVE? -> 1 :SETUp:DATA:INFO1? -> yokogawa Description Measured data (waveforms of the graph display) Description You can set up to 10 items for the product will be saved automatically to the specified information. directory.
  • Page 79 <manufacturer>, <model>, <serial number>, <firmware version> *OPT?(OPTion) Function Queries the installed options. *OPT? Syntax *OPT? -> OPM _ UNIT,”0” Example Description The option information is returned in the following format: OPM _ UNIT,”0|1” OPM_UNIT: AQ740023 0: no connection 1: connected 7-17 IM AQ7420-01EN...
  • Page 80 This product includes open source software. For the license of each open source software, please refer to OLCR_Attribution.txt in the installation folder of the AQ7420 control software that is included with the product. For the installation folder, see section 2.1.