Page 1 User’s Manual AQ7280 OTDR IM AQ7280-01EN 5th Edition...
Page 2 This user’s manual explains the features, operating procedures, and handling precautions of the AQ7280. To ensure correct use, please read this manual thoroughly before beginning operation. Keep this manual in a safe place for quick reference in the event that a question arises.
Page 3 Panel Key Names and Soft Key Names in Bold Characters Indicate panel keys that are used in the procedure and soft keys and menu items that appear on the screen. Unit Denotes 1000. Example: 400 km Denotes 1024. Example: 400KB (file size) IM AQ7280-01EN...
Page 4: Table Of Contents
Copying and Deleting Files .....................6-11 Renaming Files ......................6-13 Creating Folders ......................6-15 Copying and Deleting Folders ..................6-17 Creating Reports of Waveform Data as PDF Data ............. 6-19 Setting the Items to Display in File Lists ................. 6-25 IM AQ7280-01EN...
Page 5: Table Of Contents
Printing Saved Waveforms ..................... 6-29 Chapter 7 System Configuration Setting the Power Save Mode ..................7-1 Initializing the AQ7280 to Its Factory Default Condition ........... 7-2 Setting Operation Restrictions ..................7-3 Configuring Network Settings (/LAN option) ..............7-5 Web Server Feature ......................7-8 Other Features ........................7-11...
Page 6: System Configuration
Overview System Configuration The AQ7280 consists of a mainframe and OTDR unit. If necessary, an OPM module can be installed into the mainframe to measure loss in optical fiber cables and view the power of communication light. An VLS module can be installed to visually check the fault location.
Page 7: Overview
1.1 Overview OTDR Unit Install the OTDR unit into the mainframe to use the AQ7280 as an OTDR. There are several types of OTDR units available for different wavelengths, dynamic ranges, and the like. You can choose the one that suits your application.
Page 8 Return loss between markers can be analyzed. • Event Analysis Events are automatically detected. In addition, you can edit events and event lists. Adjustments can be made when certain events cannot be detected or when noise is detected as events. IM AQ7280-01EN...
Page 9 A fiber inspection probe specified by Yokogawa can be used to view stains on the optical fiber cable end face on the AQ7280 screen. To use this feature, start Fiber Inspection Probe from the top menu. The fiber inspection probe is not included with the AQ7280. Please purchase your own fiber inspection probe.
Page 10 The AQ7280 uses the measured power level to determine the distance to the different points (splices, breaks, etc.) of the optical fiber cable and the loss and other phenomena that occur at those points.
Page 11 Display of the Distances to Breaks after Averaged Measurement The AQ7280 can perform an averaged measurement and then automatically search for breaks (faults) in the optical fiber cable or optical line and display the distances to the breaks on the screen. If there are no faults in the middle of the optical fiber cable, the end of the cable is detected as a fault.
Page 12 During monitoring (while schedule measurement is in progress), measurement items, such as the loss between two points, of the logged optical pulses are shown on the AQ7280 screen. Because the changes in the measurement items, such as the loss between two points, can be seen on the time axis, if an interruption occurs in the optical pulse input, you can determine when the optical power level fell on the AQ7280 screen.
Page 13 Dynamic range (SNR = 1) Near-end Reflection This is the reflection that occurs at the point where the AQ7280 and the optical fiber cable are connected. This also includes the AQ7280’s internal reflection. In the section where this near-end reflection is detected, even if there are other connections, the loss and reflections that occur at these points cannot be detected.
Page 14: Dynamic Range
(horizontally). A rectangular frame that shows the display position is displayed on the overview screen that appears in the bottom right of the screen. This is the same rectangular frame that shows the zoom position. IM AQ7280-01EN...
Page 15 If the correct index of refraction is not specified, there will be errors in the distance measurement. Setting the Index of Refraction The AQ7280 has preset indices of refraction that correspond to each wavelength. For details on the settings, see section 4.1. Contact the optical fiber manufacturer for the optical fiber cable’s correct index of refraction.
Page 16 The AQ7280 measures the distance and the loss between the specified points. 2-point Method The AQ7280 measures the distance and the loss between two points. If reflection is detected between the two points, the return loss is also measured. The splice loss value changes depending on the approximation method that you have specified.
Page 17 (km) 5-point Method The AQ7280 uses the following five points to perform the measurement: the near-end point (n), a point (N) that is used to calculate the near-end side's approximated line, a point (E) where splice loss is detected, a point (F) that is used to calculate the far-end side's approximated line, and the far-end point (f).
Page 18 RL = –10log(Pr/Pi) [dB] Multi Trace Analysis You can load up to four waveforms that have been measured on the AQ7280 and display them simultaneously for comparison. You can adjust the vertical display position of each loaded waveform. 2 Way Trace Analysis Waveform events that have been measured from optical fiber cable end A to end B and those measured from end B to end A can be combined.
Page 19 1.4 Optical Pulse Analysis Differential Trace You can load two waveforms that have been measured on the AQ7280 and display their difference as a waveform. The screen can display the loaded waveforms and the differential trace simultaneously. The differential trace is the result of subtracting the values of the current trace from those of the other trace.
Page 20 1310 nm, 1490 nm, 1550 nm, 1625 nm, AQ7284A AQ7284H 1310 nm, 1490 nm, 1550 nm, 1625 nm, 1650 nm AQ7285A 1650 nm AQ7283J AQ7283E AQ7283K AQ7283F * Not applicable to the port 2 of AQ7283E and AQ7283F. 1-15 IM AQ7280-01EN...
Page 21 AQ7280s to the same measurement and analysis conditions. • .BMP, .JPG A file for saving a screen image of the AQ7280. This file is useful when you want to view the screen content on the PC screen. BMP and JPG files cannot be loaded into the AQ7280.
Page 22: File Operation And Printing
You can set the save destination to the following internal and external memories. • Internal Memory The memory inside the AQ7280. The size is 480 MB. It cannot be removed. • USB Memory 1, USB Memory 2 USB storage media. Up to two media can be connected.
Page 23 Auto Power Off When battery operated, the AQ7280 can be automatically shut down if no key operation, touch operation, communication command input, or the like is detected for a certain period of time when measurement is not in progress.
Page 24: System Features
1.7 System Features Network Settings (/LAN option) You can use the Ethernet port to send communication commands from a PC to the AQ7280 or download measured results in the AQ7280 internal memory to a PC. • User Name and Password Set user names and passwords for authenticating connections from PCs to the AQ7280.
Page 25 1.7 System Features • USB (TypeB_mini) You can use USB port type B to send communication commands from a PC to the AQ7280 or download measured results from the AQ7280 internal memory or SD card to a PC. • Version Update You can update the firmware by storing a new firmware in a USB memory device and connecting it to USB port type A.
Page 26: Setting The Measurement And Analysis Conditions
When you change from Simple mode to Detail or PON mode, you may be asked to enter a password. This means that there are restrictions placed on operating the AQ7280. To change the measurement mode, you need to verify with the AQ7280 administrator. For details on operation restrictions, see “Operation Restrictions”...
Page 27 Auto Save After an optical pulse measurement is complete, the measurement waveform is automatically saved. The AQ7280 creates a folder using the current date for its name in the root folder of the drive and saves the file. Drive Folders are automatically created.
Page 28 • Least squares approximation (LSA) • Two point approximation (TPA) • LSA The AQ7280 calculates the loss between two points by using the least squares method on all the data between the two points (between 1 and 2). Index This method has the following characteristics.
Page 29 2.1 Setting the Measurement and Analysis Conditions • TPA The AQ7280 uses the difference between the levels of the two specified points to calculate the loss. The level of fluctuation and reproducibility in the calculated value may vary greatly. If events such as reflections and splice losses are present in the section being calculated, the TPA provides a value that has a smaller degree of error than the LSA.
Page 30 The wavelengths set in Wavelength 1 to Wavelength 4 are measured one at a time (multi wavelength measurement). You can set only the wavelengths of the same OTDR port. For the wavelengths that you can set, see page 2-2. IM AQ7280-01EN...
Page 31 Specify a distance range value that is greater than the length of the optical fiber cable that you will measure. If you specify a shorter value, the AQ7280 will not be able to perform measurements properly. The longer the distance that you specify, the more time measurements will take.
Page 32 The AQ7280 uses the optimum sample interval for the measurement method to perform measurements. High Resolution: The AQ7280 uses a sample interval that would result in the greatest number of data points. If you use a short sample interval, you can measure for finer changes. However, the data size of the measured result becomes large.
Page 33 When this feature is set to on, you can prevent light from being transmitted from the AQ7280 OTDR port or light source port if an optical fiber cable is not connected to the AQ7280 or if the cable is not connected correctly.
Page 34 In this mode, folders that are named with dates are automatically created in the selected drive. UserDefine: In this mode, specify the save destination folder. • Destination Folder Create a folder of your choice in advance in the selected drive, and select this folder as the save destination folder. Index IM AQ7280-01EN...
Page 35 See page 2-3. Index of Refraction (IOR) The AQ7280 uses the index of refraction to calculate the distance. If you do not set the index of refraction correctly, the distance measurement will be incorrect. The index of refraction varies depending on the connected optical fiber cable. Enter the value recommended by the manufacture of the cable.
Page 36 If you do not set the correct backscatter level, the return loss and total return loss measurements will be incorrect. On the AQ7280, you can select the reference pulse width for the backscatter level (see section 3.2). The selectable range of backscatter levels vary depending on the reference pulse width.
Page 37 Events that have exceeded their thresholds are not displayed with an asterisk attached to them. Judgment The judgment information is displayed in the lower left of the AQ7280 screen. Display: The number of fault events, total loss, and total return loss are displayed.
Page 38 This is the threshold of the difference between the splice losses of each wavelength when optical pulses are measured. When the difference between the splice losses of each wavelength for the same event is larger than this value, the event is detected as a bending loss. 2-13 IM AQ7280-01EN...
Page 39 Setting Analysis Conditions in PON Mode Press the Analysis Setup soft key to display the following screen. Set the splitter and wavelength. See “Setting Measurement Conditions in PON Mode.” For details on analysis items, see pages 2-10 to 2-13. 2-14 IM AQ7280-01EN...
Page 40: Performing Averaged Measurements
French AVERTISSEMENT • Lorsque l’AQ7280 génère de la lumière, la lumière est émise à travers les ports de source lumineuse. Ne pas débrancher les câbles de fibre optique connectés. Des lésions oculaires peuvent être causées si le faisceau lumineux pénètre l’œil.
Page 41 If you are using markers to measure distance, loss, and the like during an averaged measurement, when the measurement completes correctly (100%), the AQ7280 automatically closes the marker measurement screen. If Event Search is set to Auto, the event screen appears when the measurement is completed correctly.
Page 42 French AVERTISSEMENT • Lorsque l’AQ7280 génère de la lumière, la lumière est émise à travers les ports de source lumineuse. Ne pas débrancher les câbles de fibre optique connectés. Des lésions oculaires peuvent être causées si le faisceau lumineux pénètre l’œil.
Page 43 This feature uses three different pulse widths to measure the same wavelength and then combines the three measurement waveforms. Based on the specified distance range, the AQ7280 automatically sets a pulse width best suited to short range measurement, that best suited to mid- range measurement, and that best suited to long range measurement and performs measurements.
Page 44 • During averaged measurement, you cannot set the measurement conditions. • You can start averaged measurement by pressing AVG even while the measurement setting screen is showing. • In OTDR Smart Mapper, real-time measurement is not possible. 2-19 IM AQ7280-01EN...
Page 45 Resets the line positions of the target section Waveform display outside the target section (OFF, ON) You can change the distance sections by moving the lines between the sections. You can also move the line by touching the screen. 2-20 IM AQ7280-01EN...
Page 46 If the judgment display of Pass Fail Judgement is set to Show, the judgment result is displayed in the row displaying the total values of each event. The judgment will be Fail if there is even only a single fault event. Judgment result display Number of fault events Pass: Check mark (green) Fail: 2-21 IM AQ7280-01EN...
Page 47 The AQ7280 automatically determines the pulse widths depending on the specified distance range and wavelength.
Page 48: Performing Averaged Measurement And Measuring The Distances To Breaks
The AQ7280 is equipped with a feature that you can use to locate and display faults in optical fiber cables. This feature works by performing an OTDR averaged measurement and then automatically performing an OTDR event analysis after the measurement is complete.
Page 49 You cannot return to the original screen. Note You can save measured data, but saved waveform data cannot be loaded on the AQ7280. For details on saving measured data, see section 6.3. Changing Settings Press SETUP to display the following screen.
Page 50 Faults are not detected during real-time measurement. During a fault locator’s real-time measurement, you can perform cursor operations or select the wavelength during measurements. If you cancel measurements prematurely, faults will not be detected. 2-25 IM AQ7280-01EN...
Page 51 The position of the end of the cable will be considered to be the position of the break, and the distance to that position will be displayed. In such a case, verify the event position on the displayed waveform with the distance to the installed ONU. 2-26 IM AQ7280-01EN...
Page 52: Performing Real-Time Measurement
French AVERTISSEMENT • Lorsque l’AQ7280 génère de la lumière, la lumière est émise à travers les ports de source lumineuse. Ne pas débrancher les câbles de fibre optique connectés. Des lésions oculaires peuvent être causées si le faisceau lumineux pénètre l’œil.
Page 53 (depending on how fast the optical fiber cable will be installed). This is because the AQ7280 notifies you of the work completion, which is your sign to measure the connection loss at that point (splice, connection, etc.).
Page 54 When the fiber end detection position (the event) during real-time measurement is the same as the cursor position (CheckPoint), the AQ7280 gives a notification (message indication and alarm sound) that the cable installation is complete.
Page 55: Analyzing Waveforms
French AVERTISSEMENT • Lorsque l’AQ7280 génère de la lumière, la lumière est émise à travers les ports de source lumineuse. Ne pas débrancher les câbles de fibre optique connectés. Des lésions oculaires peuvent être causées si le faisceau lumineux pénètre l’œil.
Page 56 Averaged Measurement with High Resolution Setting If the high resolution measurement conditions are specified in real-time measurement, averaged Index measurement can be performed with those conditions. Press AVG to perform averaged measurement while maintaining the high-resolution conditions. 2-31 IM AQ7280-01EN...
Page 57 In normal measurement, the sampling interval is set so that data can be sampled at all distances according to the specified distance range. The maximum number of data samples on the AQ7280 is 256000 (when the distance range is 512 km).
Page 58 Displaying Reference Trace Waveforms You can measure waveforms while retaining the previous waveform on the screen (a reference trace). The AQ7280 displays the measurement waveform and the reference trace waveform at the same time. Procedure Reference Trace Screen From the top menu, select OTDR.
Page 59: Performing Multi-Core Fiber Measurement
French AVERTISSEMENT • Lorsque l’AQ7280 génère de la lumière, la lumière est émise à travers les ports de source lumineuse. Ne pas débrancher les câbles de fibre optique connectés. Des lésions oculaires peuvent être causées si le faisceau lumineux pénètre l’œil.
Page 60 Setting the Project Name Projects are group of items for measuring multi-core fibers. The default project name is “NewProject.” In the AQ7280 internal memory, core information, measurement conditions, analysis conditions, Index measured results, and the like are linked with the project name and saved. You can set up to 15 characters for the project name.
Page 61 10 when the number of cores in each division is set to “10 cores.” Example: When the number of cores in each division is set to “8 cores,” even if you set the number of cores to 12, it will be set to 16. 2-36 IM AQ7280-01EN...
Page 62: Measurement Conditions
Note • When you change measurement core information, measurement conditions, or analysis conditions, the project file (.MPJ extension) is automatically overwritten. • If the number of cores exceeds 100, measurement conditions and analysis conditions cannot be changed. 2-37 IM AQ7280-01EN...
Page 63 Performs real-time measurement. Operates in the same manner as the REALTIME key. Optical power measurement (see section 5.2) Average Performs averaged measurement. Operates in the same manner as the AVG key. Fiber inspection probe Observe the fiber end face. See section 8.6. 2-38 IM AQ7280-01EN...
Page 64 Create labels. You can enter a label for each core. Enter the label characters by following the procedure provided in “Entering Character Strings” in the IM AQ7280-02EN. Cannot be selected during measurement. Note • If Wavelength on the main view screen is set to “All,” measurement is executed using multiple wavelengths for each core.
Page 65 You can select one of the wavelengths that have been set in the measurement conditions. Returns to the main view screen • If Event Search is set to Auto, after measurement is complete, the event screen and event analysis menu appear. 2-40 IM AQ7280-01EN...
Page 66 You can enter a label for each core. * Enter the label characters by following the procedure provided in “Entering Character Strings” in the IM AQ7280-02EN. Cannot be selected during measurement. During measurement, press REAL TIME to stop the measurement.
Page 67 Tap a core number to display a measurement item menu. Tap FiberInspec. Probe to display the following screen. For details on how to use the fiber inspection probe, see section 8.6. Returns to the main view screen 2-42 IM AQ7280-01EN...
Page 68 Optical Power Measurement Results and Fiber End Face Observation Results The optical power of the measured wavelength is displayed. An image data is displayed for the observation result the fiber end face. Optical power values Preview image 2-43 IM AQ7280-01EN...
Page 69 MPZ. Select the source file (MPZ file) and the conversion destination. An MPJ file and SOR files will be extracted. AQ7932 (sold separately) is a PC software application for analyzing and creating reports of waveform data measured by the AQ7280. 2-44 IM AQ7280-01EN...
Page 70 The “multi-core fiber project editor” can be used to create projects whose measurement conditions are different for each core. • To load a past project into the AQ7280, you need an MPJ file and an SOR file (data saved with the project). Index...
Page 71 French AVERTISSEMENT • Lorsque l’AQ7280 génère de la lumière, la lumière est émise à travers les ports de source lumineuse. Ne pas débrancher les câbles de fibre optique connectés. Des lésions oculaires peuvent être causées si le faisceau lumineux pénètre l’œil.
Page 72 When a schedule measurement is being performed, you cannot perform marker analysis or event analysis. When a schedule measurement is stopped, you can perform marker analysis or event analysis on the measurement waveform data. But, you cannot save the analysis results. 2-47 IM AQ7280-01EN...
Page 73 You can display the waveform data at the cursor position. While waveform data is being displayed, the menu changes. Marker See section 4.1. Event analysis See section 4.2. Select the displayed waveform. Switches to the waveform display of each wavelength. Starts or stops schedule measurement 2-48 IM AQ7280-01EN...
Page 74 Press the Display Item Setup soft key. A message screen appears (set the markers need for item displaying in advance). Select OK, and press ENTER. A display item setup menu appears. Index Marker See section 4.1. Set display items. Set point monitoring. Returns to the main view screen 2-49 IM AQ7280-01EN...
Page 75 • When a schedule measurement is being performed, you cannot set the display items. • When a schedule measurement is being performed, you cannot perform marker or event analysis even if you switch to waveform display. 2-50 IM AQ7280-01EN...
Page 76 Measured data file In the above example, the save destination of a file saved at 9:00 on October 20, 2014 is shown. The file name is wavelength_min.SOR. The name of the file for 1310 nm and 9:20 is 1310_20.SOR 2-51 IM AQ7280-01EN...
Page 77 If the CSV file and SOR waveform data during the scheduled period are saved in a similar file and folder configuration as described above, you will be able to analyze the graph and waveform again when the CSV file is loaded into the AQ7280. Note •...
Page 78 2.10 Using Convenient Touch Operation Features The AQ7280 screen is a touch panel. On the screen, there are several setup menus and measurement functions that you can access through the touch panel. You can start a different function while a measurement function is running or view the waveform by zooming in.
Page 79 When an optical pulse measurement is in progress, you can use the OPM module or VLS module that is installed in the AQ7280. Tap a function name to start the operation screen for the optical power meter, light source, and so on.
Page 80 Flick to scroll the menu. • Switching the Menu Display Index You can switch the menu display as follows. : The menu is displayed in a tabular form. : The menu is displayed in a scrollable form. Scrollable form Tabular form 2-55 IM AQ7280-01EN...
Page 81 You can perform functions such as starting and stopping measurement and saving files by tapping the shortcut icons without displaying the soft key menu for those functions. For details on the shortcut icon display, see section 3.1. 2-56 IM AQ7280-01EN...
Page 82 Waveform Display Screen Display Screen Date and time Progress during averaged measurements (AVG) See the Started Guide, IM AQ7280-02EN. The progress bar behind the characters indicates progress. See section 2.2. Value per division on the vertical axis Cursor movement resolution The OTDR port emitting light See section 3.3.
Page 83 Press SETUP to display the Setup menu. Set the measurement mode. See section 2.1. Set the measurement conditions. See section 2.1. Set the analysis conditions. See section 2.1. Configure the waveform display. Configure the system. See chapter 7. IM AQ7280-01EN...
Page 84 You can reduce the measurement condition display area and the display area for measured values of the marker section and expand the waveform display area. OFF: The waveform display area is not expanded. The waveform display area is expanded. IM AQ7280-01EN...
Page 85 Light ray A that is reflected at connection II in the figure is reflected again at connection I and propagates in the direction of II as light ray B. At this point, the AQ7280 detects A as an event. ↓...
Page 86 You can select the cursor display format from the following. CROSS(+) The position on the waveform is displayed with vertical and horizontal cursors that intersect. LINE( ¦ ) The position on the waveform is displayed with a vertical cursor. Line display Crosshair display IM AQ7280-01EN...
Page 87 **.*: 1 decimal place **.**: 2 decimal places **.***: 3 decimal places Distance Decimal You can select the number of decimal places of the distance display. **.***: 3 decimal places **.****: 4 decimal places **.*****: 5 decimal places IM AQ7280-01EN...
Page 88 Select the file information you want to display on the screen. File Name: FileName, Size, and Date are displayed on the file list screen. File Name + Label: FileName, Label, Size, and Date are displayed on the file list screen. Index IM AQ7280-01EN...
Page 89 Marker mode Line mode Note Line is often used outside of Japan. Marker is often used within Japan. It is used on existing YOKOGAWA models. Backscatter Level Base Select the reference pulse width for detecting backscatter. The selectable range of backscatter levels in the analysis conditions vary depending on the reference value.
Page 90 Include END: The value is included in the total return loss. Exclude END: The value is not included in the total return loss. Measurement reference point Event number 1 Event number 2 END point ▲ ▲ ▲ ▲ E E E E IM AQ7280-01EN...
Page 91: Zooming And Moving Displayed Waveforms
Press the arrow keys to zoom the displayed waveform in or out. Moving the Displayed Waveform Press the Shift soft key. Press the arrow keys to move the displayed waveform. Note You can zoom and shift the waveform regardless of whether measurement is in progress. 3-10 IM AQ7280-01EN...
Page 92: Zooming In And Out
The cursor on the waveform display screen is shown in the center of the zoomed display. • Zoom the waveform at event positions When the AQ7280 has detected events during event analysis, the selected event is zoomed and displayed. 3-11...
Page 93 When vertical or horizontal shift is selected “Shift” appears on the screen. The frame color turns green. When you move the screen, the box that represents the display area also moves. 3-12 IM AQ7280-01EN...
Page 94 Analyzing Waveforms Switching the Waveform to Be Analyzed When data measured under multi wavelength conditions is loaded into the AQ7280, a soft key for switching the waveform with the wavelength to be analyzed appears on the OTDR menu. From the top menu, select OTDR.
Page 95 Turns the cursor link on or off Marker information Note • When you set the marker positions, set them so that the marker is the measurement start point (the distance reference). • The measured loss value differs depending on the specified approximation method. IM AQ7280-01EN...
Page 96 4.1 Analyzing Waveforms • Distance Reference Normally, the location where the AQ7280 and the optical fiber cable are connected is the measurement reference point. This reference point is the distance reference. It is used to calculate the distance to the cursor and markers. If you are using a launch fiber to perform measurements, move the distance reference the length of the launch fiber before performing measurements.
Page 97 Set the markers in the order shown above, starting with the measurement start point (the distance reference). • The measured loss value differs depending on the specified approximation method. • Set the correct position for . The splice loss changes greatly depending on the position of IM AQ7280-01EN...
Page 98 Turns the cursor link on or off Marker information Note • When you set the marker positions, set them so that the n marker is the measurement start point (the distance reference). • The measured loss value differs depending on the specified approximation method. IM AQ7280-01EN...
Page 99 From the top menu, select OTDR. Press the Marker soft key to display the marker menu. Press the Preset soft key to display the preset menu. Selects the preset action (Register, Delete, SetMarker) Preset A marker Preset B marker Preset information display screen IM AQ7280-01EN...
Page 100 Press the A or B soft key. Marker information on the preset information display screen is cleared. Index Note A marker applied to the waveform is not cleared. To clear a marker applied to the waveform, press the Delete Cursor/Marker soft key explained on page 4-2 or 4-5. IM AQ7280-01EN...
Page 101 Distance from the distance reference to the cursor Note The location where the AQ7280 and the optical fiber cable are connected is the distance reference. To perform more accurate measurements, zoom in on the waveform. Using Markers to Measure the Distance Follow the procedure below to measure the distance between two markers.
Page 102 Approximated line point on the near-end side Set marker N. Near-end point Splice loss detection point Set marker n. Set marker E. Approximated line point on the far-end side Set marker F. Far-end point Set marker f. Measured splice loss (result) IM AQ7280-01EN...
Page 103 Event detection start Peak value position The AQ7280 detects the peak between the markers, and calculates Set marker the level between the peak and the rising start point of the event. Event detection end position...
Page 104 Displays the differential trace You can load two waveforms that have been measured on the AQ7280 and display their difference as a waveform. Section analysis Each item can be measured with the location that is specified as the start point within the specified section as the reference point.
Page 105 • The distances from the measurement reference (S) to the end event (E) are the same. Selecting the Current Trace Select the trace you want to display on the screen. Events of the two traces that have been combined are displayed on the current trace. 4-12 IM AQ7280-01EN...
Page 106 Event information of Trace2 before combining • Display Type • Reverse: The display direction of the trace that is not the current trace is reversed. • Normal: The display direction of the trace that is not the current trace is not reversed. 4-13 IM AQ7280-01EN...
Page 107 When marker mode is set to Marker (4 Point markers) Differential trace Trace1 waveform Trace2 waveform Marker value of the differential trace The differential trace is the result of subtracting the values of the current trace from those of the other trace. 4-14 IM AQ7280-01EN...
Page 108: Adjusting The Reference Level
Marker This is the reference point for the return loss measurement. The AQ7280 uses the backscatter level of the reference point to calculate the return loss. If a reference point is not specified, the start point is the reference point.
Page 109 Moves the trace down Performs macro bending Moves the display position of the loaded trace down. Loading Waveform Data Load waveforms of at least two wavelengths. The type of file that you can load is SOR. 4-16 IM AQ7280-01EN...
Page 110: Analyzing Events
The loss from the measurement reference point is displayed. If the distance reference is specified, the distance reference is the measurement reference point. If the distance reference is not specified, the measurement reference point (S) is the measurement reference. 4-17 IM AQ7280-01EN...
Page 111 NEW: Displayed for events that are detected after Event Fix Mode is set to Append Mode (Mode 1). Event fix type display Rotary Knob Feature You can select the operation that occurs when you turn the rotary knob from the following. Cursor: The cursor moves continuously. Event: The cursor moves directly between detected events. 4-18 IM AQ7280-01EN...
Page 112 Total distance, total loss, and total return loss are displayed. If the judgment display of Pass Fail Judgement is set to Show, the judgment result is displayed in the row displaying the total values of each event. 4-19 IM AQ7280-01EN...
Page 113 The integrated value of the splice losses at each event from the measurement reference point (S) is displayed. Loss between S and E: The loss between the measurement reference point (S) and the end of fiber (E) is displayed. 4-20 IM AQ7280-01EN...
Page 114 Press the Ins. Event (Cursor) soft key to insert an event at the cursor position. A virtual event is inserted at the cursor position. Event numbers are updated automatically. The inserted event is added to the event list. 4-21 IM AQ7280-01EN...
Page 115 If you delete the distance reference, the S point is displayed again at its original position. • If you delete the E event, the event that has the largest number becomes the E event. 4-22 IM AQ7280-01EN...
Page 116 Press the Select soft key to select the event marker that you want to move. Selects an event marker (C, n, N, E, F, f ) Press this soft key to select the event marker that you want to move. 4-23 IM AQ7280-01EN...
Page 117 Press the Event Analysis soft key, the Display soft key, and then the List Edit soft key to display the following screen. Edit the distance. Edit the return loss. Edit the section group index (section IOR). Edit the event type. 4-24 IM AQ7280-01EN...
Page 118 To display bending loss events during measurement, perform multi wavelength measurement (at least two wavelengths from 1310 nm, 1490 nm, 1550 nm, and 1625 nm). Note If the waveforms of the two wavelengths are not being acquired, bending losses cannot be detected. 4-25 IM AQ7280-01EN...
Page 119 Follow the procedure provided in “Entering Character Strings” in the Getting Started Guide, IMAQ7280-02EN. Press ENTER. The entered comment appears below the event information display. Entered text Note You can enter up to 36 characters for a comment. 4-26 IM AQ7280-01EN...
Page 120: Outputting Light (/Sls Option, Vls)
French AVERTISSEMENT • Lorsque l’AQ7280 génère de la lumière, la lumière est émise à travers les ports de source lumineuse. Ne pas débrancher les câbles de fibre optique connectés. Des lésions oculaires peuvent être causées si le faisceau lumineux pénètre l’œil.
Page 121 From the top menu, select VLS to display the following screen. Emission wavelength Turns the light on The measurement light turns on. A mark appears on the AQ7280 display to indicate that the light is on. Turns the light off The light turns off. The light mark disappears.
Page 122: Measuring Optical Power (Opm, /Pc Option)
Making Preparations for Measurements Remove the optical fiber cables from the AQ7280 and close the optical connector covers, or make sure that the optical power meter section is not receiving any light, and then start the optical power meter zero-set procedure.
Page 123 You can set the wavelength to a value from 1270 nm to 1610 nm in 20 nm steps. Average Times The value after averaging the specified number of times is displayed as the measured value. Select the average count from the following. 1, 10, 50, 100 IM AQ7280-01EN...
Page 124 Measuring Optical Power Values of Multi-Core Fiber You can save data (measurement conditions and measured value) to the AQ7280 internal memory by specifying the core number and tape number type. You can also save the data to a CSV file.
Page 125 Collectively deletes the No. 1, 2, and 3 data of the selected core Collectively deletes all the data of all cores When you delete data, the screen returns to the Save Data menu after the data is deleted. IM AQ7280-01EN...
Page 126 The core number display will be as follows. OFF: 1, 2, 3, ... a-d(4): 1a, 1b, 1c, 1d, 2a, 2b, 2c, 2d, 3a, 3b, 3c, 3d, ... Core 1a, 1b, 1c, 1d Cable How tape No. a-d(4) are used IM AQ7280-01EN...
Page 127 Data in the save area saved in the core number list can be consolidated and saved in a single CSV file. The data that you save can be edited in a spreadsheet application. The file can also be loaded into the AQ7280.
Page 128 Executing Logging and Saving While the power meter feature is running, the AQ7280 is constantly measuring the optical power. To save the measured values, execute logging.
Page 129 Note The logging results are saved in a CSV file, so you can open it with a spreadsheet application. The file can also be loaded into the AQ7280 to display the graphs. Setting the Logging Conditions Press SETUP and then the Logging soft key to display the following screen.
Page 130 OTDR unit) Making Preparations for Measurements Remove the optical fiber cables from the AQ7280 and close the optical connector covers, or make sure that the OTDR port is not receiving any light, and then start the power checker zero-set procedure.
Page 131 Set the upper and lower limits. See page 5-5. Note With the /PC option of the OTDR unit, you cannot save measured data to files. If you need to save data, use the OPM module, explained earlier. 5-12 IM AQ7280-01EN...
Page 132: Connecting Usb Storage Media To The Usb Ports
Do not remove and connect a USB memory device at short intervals. Provide at least a 10-second interval between removal and connection. • Do not connect or remove a USB memory device from the time when the AQ7280 is turned on until key operation becomes available. •...
Page 133: Connecting An Sd Card
SD memory card with a wireless LAN function (FlashAir) The AQ7280 supports SD memory cards with a wireless LAN function (FlashAir). By using an SD memory card with a wireless LAN function, you can access files in FlashAir and transfer data from a PC, smartphone, or tablet.
Page 134: Saving And Loading Data
If more than 250 files and folders are saved in a single folder, a warning message will be displayed. Saving is possible, but file operations will slow down. • No more than 550 files or folders can be saved in a single folder. If you do, an error message will appear. IM AQ7280-01EN...
Page 135: File Menu
File Menu Press FILE to display the File menu. The file menu on the AQ7280 varies depending on the feature in use. • When the OTDR, OTDR Smart Mapper, Fault Locator, or power meter feature of the top screen or top menu is in use Set the action (Save, Load).
Page 136 On the screen that appears, enter the values for the items according to “Entering Character Strings” in the Getting Started Guide, IM AQ7280-02EN or select from the displayed options. The label items are company name, name, cable ID, fiber ID, fiber type, cable code, start position, end position, and current data flag.
Page 137 CURRENT (CG)) Set the direction (A→B, B→A). This is available only for multi-core fiber measurement. * Enter the label by following the procedure provided in “Entering Character Strings” in the Getting Started Guide, IM AQ7280-02EN. Explanation Action Select Save or Load.
Page 138 The following types of files can be loaded. • Top Screen Display Description *.CFG System settings are loaded. • OTDR feature Display Description *.SOR Optical pulse waveform (including measurement conditions) in SOR format that conforms to Telcordia SR-4731 is loaded. *.SET Measurement conditions are loaded. IM AQ7280-01EN...
Page 139 SD card (external memory) inserted into the AQ7280 USB Memory 1 The first USB storage medium connected to a type A USB port of the AQ7280 USB Memory 2 The second USB storage medium connected to a type A USB port of the AQ7280 Note •...
Page 140 (save, copy, rename, create folder, etc.). Full path name: When you are operating a folder, it is the path up to the folder name. When you are operating a file, it is the path up to the file name. IM AQ7280-01EN...
Page 141 Shows from which side the optical fiber cable connecting the start position (A) and stop position (B) was measured. A -> B Measured with the AQ7280 connected to the start position (A) B -> A Measured with the AQ7280 connected to the stop position (B) * This is available only for multi-core fiber measurement.
Page 142: Copying And Deleting Files
Pressing the Dest. Folder soft key displays a screen for selecting the copy destination folder. After selecting a folder on this screen, pressing the Copy soft key displays a confirmation message for executing the operation. Tap OK to execute it. 6-11 IM AQ7280-01EN...
Page 143 Folders other than USER/DATA are used by the AQ7280; do not save files in the other folders. If you do, the files will be deleted. In addition, do not manipulate the other folders. If you do, the AQ7280 will not be able to start properly.
Page 144: Renaming Files
A character input dialog box will open. Enter the file name and extension by following the procedure provided in “Entering Character Strings” in the Getting Started Guide, IM AQ7280-02EN. Tapping Enter in the character input dialog box changes the file name to the name you entered.
Page 145 “Entering Character Strings” in the Getting Started Guide, IMAQ7280-02EN. • Enter the extension also in the character input dialog box. • When you tap the Enter in the character input dialog box, the file name will change to the specified name. 6-14 IM AQ7280-01EN...
Page 146: Creating Folders
A character input dialog box will open. Enter the folder name by following the procedure provided in “Entering Character Strings” in the Getting Started Guide, IM AQ7280-02EN. Tapping Enter in the character input dialog box changes the folder name to the name you entered.
Page 147 In the character input dialog box that appears, enter the folder name. You can use up to 20 characters. Follow the procedure provided in “Entering Character Strings” in the Getting Started Guide, IMAQ7280- 02EN. When you tap the Enter in the character input dialog box, a folder with the specified name will be created. 6-16 IM AQ7280-01EN...
Page 148: Copying And Deleting Folders
Pressing the Dest. Folder soft key displays a screen for selecting the copy destination folder. After selecting a folder on this screen, pressing the Copy soft key displays a confirmation message for executing the operation. Tap OK to execute it. 6-17 IM AQ7280-01EN...
Page 149 Select a folder on a different drive for the copy destination. Note If you want to send files and folders in the AQ7280 internal memory to a PC using the AQ7280 mini-B USB port, the AQ7280 mini-B USB port function must be set to Storage (see section 7.6).
Page 150: Creating Reports Of Waveform Data As Pdf Data
Pressing the Save soft key displays a screen for selecting the PDF output folder. Select a folder on this screen, and press the Save soft key to export to PDF. PDF files are exported for all the selected files. 6-19 IM AQ7280-01EN...
Page 151 Press the Setup soft key to display the following screen. When Action is set to File Report Report format Set the number of waveforms and the event items to show in the report. The items are the same as for “Report.” Format display for two waveforms 6-20 IM AQ7280-01EN...
Page 152 For File Report, SOR and SMP files can be exported to PDF. • You cannot view PDF files on the AQ7280. Use a PC for this purpose. To view the PDF files, you need Adobe Reader 5.0 or later. •...
Page 153 Model Name Cable ID Unit Name 1, 2 Cable Code FW Ver. Report Date Automatically included by the AQ7280 Firmware version • Measured Results The following information is included. • Total distance • Total loss • Total return loss • Number of events •...
Page 154 Distance from the start point Distance between events Icon types The following six types of icons are displayed. Start point Bending loss (macro bending) Splice point Connector (return loss) Positive splice loss, negative splice loss Optical splitter End point 6-23 IM AQ7280-01EN...
Page 155 The following information is included. Events that are set to Off are not included in the list. • Event number • Distance • Section • Splice loss • Return loss • Cumulate Loss • dB/km • Event type • Section Group Index 6-24 IM AQ7280-01EN...
Page 156: Setting The Items To Display In File Lists
(year/month/day hour:minute:second, year/month/day hour:minute, abbreviated year/month/day hour:minute, month/day hour:minute, hour:minute). Set what to sort by (Date, File Name). Set the sort order (A -> Z, Z -> A). Turns the tree view on or off Preview See above. 6-25 IM AQ7280-01EN...
Page 157 Only file names are listed. File names can be displayed up to their first 36 characters. Customize You can specify the items you want to display in the file list. • Data size (ON/OFF), date (ON/OFF), tree view (ON/OFF) • Date format, what to sort by, and sort order 6-26 IM AQ7280-01EN...
Page 158: Printing The Current Displayed Waveform
(index of refraction, event threshold) are printed. • Measured Date The date of waveform measurement can be printed (not the date of printing). OFF: The date is not printed. The date is printed. 6-27 IM AQ7280-01EN...
Page 159 6.10 Printing the Current Displayed Waveform Starting to Print A screen image will be printed. Note • Do not connect an incompatible printer. • For USB printers that have been tested for compatibility, contact your nearest YOKOGAWA dealer. 6-28 IM AQ7280-01EN...
Page 160: Printing Saved Waveforms
You can specify several saved SOR files and print screen images one at a time. Note • Do not connect an incompatible printer. • For USB printers that have been tested for compatibility, contact your nearest YOKOGAWA dealer. • Only SOR files can be printed. 6-29 IM AQ7280-01EN...
Page 161: Setting The Power Save Mode
Auto Power OFF Index If the AQ7280 is left standing for a certain period with the power turned on, the power will be automatically turned off. The power will not be automatically turned off, however, when measuring with the OTDR feature.
Page 162: Initializing The Aq7280 To Its Factory Default Condition
Note If you send files and folders in the AQ7280 internal memory to a PC using the AQ7280 mini-B USB port, they are downloaded at the data rate depending on the PC performance. To use this feature, the AQ7280 mini-B USB port function must be set to Storage (see section 7.6).
Page 163: Setting Operation Restrictions
(the default value is 0000). Enter the new PIN. Enter the new PIN again for confirmation. Confirms the input Initializing the PIN When you change the setting, both the administrator PIN and user PIN will be initialized. For details, see section 7.2. IM AQ7280-01EN...
Page 164 You can apply operation restrictions with a PIN (password) to prevent mistakenly emitting the laser at a place where it is prohibited and prevent operators from changing the detailed measurement conditions of the AQ7280. Light Source Lock The following operations can be restricted.
Page 165: Configuring Network Settings (/Lan Option)
Network settings apply models with the /LAN option. You can use communication commands through the Ethernet port to control the AQ7280 or access the AQ7280 from a PC that has an FTP client and download the data that is stored on the AQ7280 internal memory.
Page 166 DHCP DHCP If there is a DHCP server on the network to which the AQ7280 is connected and you want to use DHCP, set this to ON. Consult your network administrator to verify if DHCP is available. IP address, netmask, and gateway parameters are assigned automatically.
Page 167 Port Forwarding (UPnP) UPnP Port Forwarding If the AQ7280 is connected to a network through a router with a NAT function, the AQ7280 cannot be controlled from a PC over the router. The AQ7280 has a function for transferring data with routers with a NAT function that support Universal Plug and Play (UPnP).
Page 168: Web Server Feature
If you set the user name in the network settings to “anonymous,” enter “anonymous” for the user name. You do not have to enter the password. To connect in View Mode, enter “guest” for the user name and “yokogawa” for the password, and click OK.
Page 169 Displaying the File Dialog Box and Downloading Files Click File List at the top of the screen. A directory structure of the AQ7280 internal memory, SD card, and USB memory devices connected to the AQ7280 appears. Click download to download the corresponding file to your PC.
Page 170 There are two connection modes: Control and View. Control Mode: The AQ7280 screen is displayed on your PC screen. You can control the AQ7280 with a mouse or through the touch panel of your PC. You can also download files from the AQ7280.
Page 171: Other Features
Cancels the settings Explanation Language Set the language used on the AQ7280 screen. The options are displayed according to the language suffix code of each product. For details on the language suffix codes, see the Getting Started Guide, IM AQ7280-02EN.
Page 172 Do not manipulate (create, delete, and rename) the folders on the AQ7280 from an external device. If you do, the AQ7280 may not be able to start correctly and may cause a screen prompting to initialize the internal memory to appear. For details on initialization, see section 7.2.
Page 173: If A Problem Occurs
See the Getting Started Guide, IM AQ7280-02EN. When it is likely that the usage limitations of the AQ7280 will be exceeded, the AQ7280 will display a warning message and turn off automatically to prevent damage. For the conditions under which such messages appear, see section 8.2.
Page 174: Error Messages
Messages are displayed according to the language setting (see section 7.6). If the corrective action states that serving is required, contact your nearest YOKOGAWA dealer. In addition to the following messages, there are also communications error messages. These error messages are described in the Communication Interface User’s Manual (IM AQ7280-17EN).
Page 175 Conditions of the macro bending do not match. Cannot save onto the media. This media is for read-only. Can not recognize file system. -Internal memory: Contact Yokogawa's representatives. - USB memory or SD card: Try the other media or format again with FAT Storage media has been disconnected while the media is being accessed.
Page 176 No paper (USB printer) USB printer cannot be found. Perform the power cycle. The printer is out of order, and needs to be repaired. Please contact Yokogawa's representatives. Event list cannot be printed because event analysis is not performed. Cannot execute it while printing.
Page 177 Battery is low Please power it off, and charge the battery or replace the battery. Or, please use the AC power supply. Backup battery failed, and needs to be repaired. Please contact Yokogawa's representatives. Hardware failed, and needs to be repaired. Please contact Yokogawa's representatives.
Page 178: Viewing The Product Information
Firmware information Explanation The Product Information screen displays the information (model, serial number, suffix code) inscribed on the name plate affixed to the AQ7280, measurement light wavelength, and firmware version information. Saving the Screen Image The screen image of the product information can be saved in internal memory.
Page 179: Executing A Self-Test
On the top menu, press SETUP to display the following menu. Executes a self-test Note Perform a self-test with the battery pack installed in the AQ7280. If the battery pack is not installed, the test will result in error. Explanation...
Page 180: Updating The Firmware
• If necessary, you can change the file name, but on the extension. For details, see section 6.5. • When updating the firmware, connect the AC adapter to the AQ7280. • When a firmware update completes successfully, the AQ7280 will restart automatically.
Page 181: Checking The Optical Fiber End Face For Stains
Checking the Optical Fiber End Face for Stains By connecting an off-the-shelf fiber inspection probe (with a USB interface) to an AQ7280 USB port, you can display the image of optical fiber end face on the AQ7280 display. You can save the image to a file. Procedure Fiber End Face Check Screen From the top menu, select FiberInspec.
Page 182 For the procedure to set the file save destination, file type, and file name, see section 6.3. Judgment results (summary) Optical fiber cable type Appears when pass/fail judgment is performed. Appears at all times for still images. 8-10 IM AQ7280-01EN...
Page 183 Hot-plugging is supported; you can connect or disconnect a USB device at any time, regardless of whether the AQ7280 is on or off. If you connect a USB fiber inspection probe while the AQ7280 is on, the AQ7280 will automatically identify the probe.
Page 184 User) Saving Data The judgment result image and a judgment result file (including judgment settings) in CSV format are saved with the same file name (excluding the extension). Video cannot be saved. 8-12 IM AQ7280-01EN...
Page 185: Mechanical Inspection And Operation Check
If there are any problems, contact your nearest YOKOGAWA dealer. Operation Check Turn the AQ7280 on to start it. Check the following to verify that the AQ7280 is running normally. • The tops screen appears after startup. • The screen can be switched using the control keys.
Page 186: Replacing The Optical Adapter
Replacing the Optical Adapter WARNING When replacing the optical adapter, turn off the AQ7280 to prevent the light from accidentally being emitted from the light source port. Replacing the optical adapter (universal adapter or connector adapter) with the AQ7280 turned on may cause the emitted light to accidentally enter the eye.
Page 187 8.8 Replacing the Optical Adapter Installation Check that the AQ7280 is turned off. Open the optical port cover. Insert the optical adapter straight so that the guide protrusion part engages the rear shell guide hole. Flip the optical adapter’s lock lever down outward to lock it. If it is a screw type, turn the knob to the right to tighten.
Page 188: Routine Maintenance
Cleaning the Outside of the AQ7280 To clean the LCD or the outside of the AQ7280, turn the power off, and remove the AC adapter from the AQ7280. Use a damp, well-wrung cloth to clean the outside and then wipe it off with a dry cloth.
Page 189 Use a lens cleaner that does not produce fuzz or residue to clean the optical components. • The light source port can be cleaned with a stick type cleaner with the optical adapter attached, but we recommend that you remove the optical adapter to clean it. Index 8-17 IM AQ7280-01EN...
Page 190: Storage Precautions
• To avoid over discharging, if you will not use the AQ7280 for one week or longer, charge the battery pack, remove it from the instrument, and store the battery pack away from direct sunlight in a location that has an ambient temperature of 10 to 30°C.
Page 191: Recommended Part Replacement
8.11 Recommended Part Replacement YOKOGAWA guarantees the AQ7280 for the period and under the conditions of the product warranty. Under the conditions of the warranty, the following parts with limited service life and consumable parts are excluded. For part replacement and purchase, contact your nearest YOKOGAWA dealer.
Page 192: Calibration
8.12 Calibration Periodic calibration is an effective means of keeping the instrument performing correctly for a long time and of detecting malfunctions at an early stage. We recommend that you calibrate the AQ7280 once a year. 8-20 IM AQ7280-01EN...
Page 193 ......... 2-37 CSV ..................1-16 Page Cumulate Loss..............4-17 gateway .................. 7-6 cursor dB value............... 3-5 Ghost Cursor ................3-4 cursor display format .............. 3-5 Cursor Link ................4-3 cursors ..................4-1 Index-1 IM AQ7280-01EN...
Page 194 1-9, 1-11, 2-11, 4-9, 4-17 Page splitter loss................2-11 near-end reflection..............1-8 splitter search ................2-11 network connection, enabling and disabling ......1-19 Stabilized Light Source ............1-4 network settings..............1-19 start menu................1-19 Start Time Set ............... 2-47 Index-2 IM AQ7280-01EN...
Page 195 Visible Light Source ............1-4, 1-15 VLS module ..............1-2, Index Page waveform analysis ..............1-3 waveform, editing ............2-20, 2-22 Waveform Expand Mode ............3-3 wavelength ................2-2 Web server ................7-8 Page Zero-Set.................. 5-3 zoom ................1-9, 3-11 Index-3 IM AQ7280-01EN...

YOKOGAWA AQ7280 User Manual

Chapter 1 Features

Chapter 2 Optical Pulse Measurement (OTDR)

Chapter 3 Optical Pulse Waveform Display

Index

Chapter 4 Optical Pulse Analysis

Chapter 5 Optical Output and Optical Power Measurement

Chapter 6 File Operation and Printing

Chapter 7 System Configuration

Chapter 8 Troubleshooting, Maintenance, and Inspection

Quick Links

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