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ADCMT 8471 Operation Manual

Optical wavelength meter
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8471
Optical Wavelength Meter
Operation Manual
FOE-00000073A00
MANUAL NUMBER
First printing Nov 15, 2012
C
2012
ADC CORPORATION
All rights reserved.
Printed in Japan

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Summary of Contents for ADCMT 8471

  • Page 1 Cover 8471 Optical Wavelength Meter Operation Manual FOE-00000073A00 MANUAL NUMBER First printing Nov 15, 2012 2012 ADC CORPORATION All rights reserved. Printed in Japan...
  • Page 3 Safety Summary Safety Summary To ensure thorough understanding of all functions and to ensure efficient use of this instrument, please read the manual carefully before using. Note that ADC Corporation (hereafter referred to as ADC) bears absolutely no re- sponsibility for the result of operations caused due to incorrect or inappropriate use of this instrument. If the equipment is used in a manner not specified by ADC, the protection provided by the equipment may be im- paired.
  • Page 4 Safety Summary product. • When the product has ventilation outlets, do not stick or drop metal or easily flammable ob- jects into the ventilation outlets. • When using the product on a cart, fix it with belts to avoid its drop. •...
  • Page 5 Safety Summary Main Parts with Limited Life Part name Life Unit power supply 5 years Fan motor 5 years Electrolytic capacitor 5 years LCD display 6 years LCD backlight 2.5 years Floppy disk drive 5 years Memory backup battery 5 years •...
  • Page 6 Environmental Conditions This instrument should be only be used in an area which satisfies the following conditions: • An area free from corrosive gas • An area away from direct sunlight • A dust-free area • An area free from vibrations •...
  • Page 7 Types of Power Cable Replace any references to the power cable type, according to the following table, with the appropriate power cable type for your country. Rating, color Model number Plug configuration Standards and length (Option number) PSE: Japan 125 V at 7 A Straight: A01402 Black...
  • Page 9 8471 Optical Wavelength Meter Operation Manual PREFACE This manual describes the 8471 operating methods, functions and remote programming. Read and fully understand this manual for safety before using the 8471. 1. Manual Structure This manual consists of the following chapters.

  • Page 11: Table Of Contents

    TABLE OF CONTENTS 8471 Optical Wavelength Meter Operation Manual TABLE OF CONTENTS INTRODUCTION ..................Product Overview ....................Supplied Accessories ..................Operating Environment ..................1.3.1 Environmental Conditions ................1.3.2 Power Requirements ................... 1.3.3 Power Fuse ....................1.3.4 Power Cable ....................Precautions in Use .....................
  • Page 12 8471 Optical Wavelength Meter Operation Manual Table of Contents 3.2.2 FUNCTION Setting ..................3.2.3 Input Sensitivity Setting ................3.2.4 Display Digit Setting .................. 3.2.5 AVERAGE (Smoothing) Function Setting ..........3.2.6 Standard Air Wavelength ................3.2.7 Switching from Wavelength Measurement to Frequency Measurement ...
  • Page 13 8471 Optical Wavelength Meter Operation Manual Table of Contents 4.2.1 GPIB Overview ..................4.2.2 Precautions When Using GPIB ..............USB ........................4.3.1 USB Overview .................... 4.3.2 Connecting with Host Computer ..............4.3.3 Precautions When Using USB ..............Output Data Format ...................
  • Page 15 8471 Optical Wavelength Meter Operation Manual LIST OF ILLUSTRATIONS Title Page Operating Environment ..................... Replacing Power Fuse ...................... Removing Optical Connector ................... 1-10 Front Panel ........................POWER Switch ........................ Display Section ......................... FUNCTION Section ......................RESOLUTION Section ....................GAIN Section ........................
  • Page 17 8471 Optical Wavelength Meter Operation Manual LIST OF TABLES Title Page Standard Accessory List ....................Power Supply Specifications .................... Parameter Default Values and Backup ................Interface Function ......................Mantissa Part Data Format ....................Status Byte Register (STB) ....................4-13 Standard Event Status Register (SESR) ................

  • Page 19: Introduction

    Other company names and product names used herein are registered trademarks or trademarks of their respective companies. Product Overview The 8471 optical wavelength meter is capable of high-accuracy measurement of laser wavelengths and fre- quencies. The key features of the 8471 are described below: •...

  • Page 20: Supplied Accessories

    8471 Optical Wavelength Meter Operation Manual 1.2 Supplied Accessories Supplied Accessories The 8471 standard accessories are listed below. If any accessory is missing or damaged, contact an ADC Cor- poration sales representative. Specify the part number when ordering. Table 1-1 Standard Accessory List...

  • Page 21: Operating Environment

    The 8471 is designed with full consideration given to the noise contained in the AC power line. Nev- ertheless, it is recommended that the 8471 be used in an environment with as little line noise as pos- sible. If line noise is unavoidable, use a noise filter.

  • Page 22: Power Requirements

    1.3.3 Power Fuse CAUTION: If the power fuse opens, a problem may have occurred in the 8471. Contact an ADC Corporation sales repre- sentative. Always use the same fuse type and rating to prevent fire. The power fuse is placed in the fuse holder on the rear panel.

  • Page 23: Power Cable

    Only ADC authorized service personnel can open the case. The 8471 contains high-temperature and high-voltage components. If an abnormality occurs If the 8471 issues smoke, a bad odor, or unusual sound, turn off the power switch. Pull out the power cable from the outlet and contact an ADC Corporation sales representative. Warming up After the 8471 is at room temperature, turn the power on and allow it to warm up for approximately one hour.

  • Page 24: Front Foot

    1.4.1 Front Foot The 8471 has two feet respectively on the front panel side and the rear panel side at the bottom. The front feet have the tilting stands. When the retention of the front feet stands is significantly reduced, contact an ADC Corporation sales rep- resentative.

  • Page 25: Life Limited Parts

    8471 Optical Wavelength Meter Operation Manual 1.6 Life Limited Parts Life Limited Parts Follow the guidelines below to replace parts that are life limited. Contact an ADC Corporation sales representative for replacement. Part name Expected life cycle Remarks Laser tube...

  • Page 26: Product Disposal And Recycling

    1.7 Product Disposal and Recycling Product Disposal and Recycling Correctly dispose of the 8471 in accordance with local and national regulations. Before disposal, remove the following parts from the product to prevent dispersal of substances that may adversely affect the environment, human health, or the ecosystem.

  • Page 27: Cleaning, Storage, And Transport Methods

    Dirt on the end face of the internal connector in the optical input section may decrease the input sensitivity. Thus, be sure to connect the connector with its end face kept clean to the 8471. Also, clean properly the end face of the internal connector of the optical input section of the 8471. Removing the optical input section Remove the two fixing screws (M2 ...

  • Page 28: Cleaning

    Cleaning Remove dust from the outside of the 8471 by wiping or brushing the surface with a soft cloth or small brush. Use a brush to remove dust from around the panel keys. Hardened dirt can be removed by using a cloth which has been dampened in water containing a mild detergent.

  • Page 29: Transport

    1.8.4 Transport To transport the 8471, use the original box that it came in. If the box is not available any longer, pack the 8471 in accordance with the following guidelines. Prepare a corrugated cardboard box with dimensions that are larger than the external dimensions of the 8471 by 15 cm or more to allow for shock absorbent material.

  • Page 31: Panel Descriptions

    8471 Optical Wavelength Meter Operation Manual 2. PANEL DESCRIPTIONS PANEL DESCRIPTIONS This chapter describes the part names and their functions on the panels. Panel Descriptions This section describes the part names and their functions on the front and rear panels.

  • Page 32: Power Switch

    8471 Optical Wavelength Meter Operation Manual 2.1.1 Front Panel 2.1.1.1 POWER Switch Figure 2-2 POWER Switch POWER switch Turns the power ON or OFF. 2.1.1.2 Display Section Figure 2-3 Display Section LCD monitor Displays measured data, setting conditions and other information.

  • Page 33: Function Section

    8471 Optical Wavelength Meter Operation Manual 2.1.1 Front Panel 2.1.1.3 FUNCTION Section Figure 2-4 FUNCTION Section LASER key Selects the laser (continuous wave) measurement mode. Setting the LED or CHOP key releases this mode. LED key Selects the LED (continuous wave) measurement mode.

  • Page 34: Gain Section

    8471 Optical Wavelength Meter Operation Manual 2.1.1 Front Panel 2.1.1.5 GAIN Section Figure 2-6 GAIN Section AUTO key When this key lights up, the optimum gain is automatically set in conjunction with the input optical power. Pressing this key with the AUTO GAIN mode selected will turn OFF the light and switch to the MANUAL GAIN mode.

  • Page 35: Display Mode Section

    8471 Optical Wavelength Meter Operation Manual 2.1.1 Front Panel 2.1.1.6 DISPLAY MODE Section Figure 2-7 DISPLAY MODE Section HOLD key Holds the measurement result display. The HOLD key lights up in the hold status. Pressing this key again releases the hold status.

  • Page 36: Control Section

    Figure 2-8 Control Section STATUS key Displays the 8471 setting conditions on the screen. Pressing the cursor keys  /  on the MENU section will change the screen dis- play. Pressing this key again or the EXIT key will release the sta- tus display.

  • Page 37: Menu Section

    8471 Optical Wavelength Meter Operation Manual 2.1.1 Front Panel 2.1.1.8 MENU Section Figure 2-10 MENU Section MENU key Enters the menu display mode and displays the menu as below. Refer to Section 3.11, "Menu Operation." Figure 2-11 MENU Display ENTER key Confirms selected parameters in the menu.

  • Page 38: Local Section

    The maximum total power that can be measured is +10dBm. The maximum total power that can be input is +13dBm. CAUTION: The 8471 is a Class 1 laser product. Do not look into the input connector directly. Do not allow the total power of input signals to exceed +13dBm, otherwise the 8471 may be broken.

  • Page 39: Rear Panel

    BNC connector, output voltage of 0 V to 1 V approximately AC power connector Used to connect the 8471 to the AC power supply by using the supplied power cable. The center pin among the three is the grounding pin.

  • Page 40: Annotations

    REMOTE status display RMT: Appears in remote control via the USB or GPIB inter- face. Appears when the 8471 is addressed as Lister or Talker in remote control. AVERAGE status display Indicates "AVG: average count/specified count" when the AVER- AGE mode is selected.
  • Page 41 8471 Optical Wavelength Meter Operation Manual 2.1.3 Annotations LEVEL/GAIN display Indicates the measurement operation level of input light and the setting status of GAIN. The operation level is displayed is three levels as " ." H: Over level L: Low level GAIN is displayed in eight stages from 0 to 7 as "G: numeric."...

  • Page 43: Basic Operation

    8471 Optical Wavelength Meter Operation Manual 3. BASIC OPERATION BASIC OPERATION This chapter describes how to operate the 8471 using examples. NOTE: The operation procedures listed permit the settings to be made in the shortest time. If the display differs from the one shown, repeat the procedure from the beginning.

  • Page 44: Setting Status Check

    Setting Status Check When the 8471 operates correctly, the settings after the power is turned ON are restored to what they were just before the power was turned OFF. For the settings to be stored when the power is turned OFF, refer to Table 3-1.

  • Page 45: Setting Status Initialization

    8471 Optical Wavelength Meter Operation Manual 3.1.3 Setting Status Initialization 3.1.3 Setting Status Initialization Initialize the settings of the keys on the front panel and the MENU function according to the following procedure: Press the MENU key. Select 5. PRESET with the  /  /  /  keys and press the ENTER key.
  • Page 46 8471 Optical Wavelength Meter Operation Manual 3.1.3 Setting Status Initialization Table 3-1 Parameter Default Values and Backup (2 of 2) Default setting Power OFF Parameter Parameter saving saving Factory default Preset GPIB/USB GPIB GPIB ADD USB ID HEADER PARAMETER POWER ON LOAD...

  • Page 47: 3.1.4 Operation Check By Self-Check Function

    The following is displayed on the screen. 1000.0001 If a count other than above is displayed, the 8471 does not operate normally. Contact an ADC Cor- poration sales representative. Press the CHECK key again or press the LASER, LED or CHOP key to release the self-check func- tion and return to the measurement mode.

  • Page 48: Wavelength Measurement

    3.2 Wavelength Measurement Wavelength Measurement In wavelength measurement for the 8471, the measured wavelengths can be converted to vacuum wave- lengths or standard air wavelengths. "VAC" is displayed following the measured value for vacuum wave- lengths as "152.356 nm VAC." Similarly, "AIR" is displayed is for standard air wavelengths. The measurement procedure after setup is described below.

  • Page 49: Display Digit Setting

    8471 Optical Wavelength Meter Operation Manual 3.2.4 Display Digit Setting 3.2.4 Display Digit Setting If measured values are hard to read because of variations in the wavelengths of input light, press the on the RESOLUTION section to blank out the lower digits. An appropriate resolution is displayed.

  • Page 50: Average (Smoothing) Function Setting

    8471 Optical Wavelength Meter Operation Manual 3.2.5 AVERAGE (Smoothing) Function Setting 3.2.5 AVERAGE (Smoothing) Function Setting When using the AVERAGE (smoothing) function, press the AVG key on the FUNCTION section. The AVG key goes ON and the screen is displayed as "AVG:1/10." The denominator indicates the setting number of measurements and the numerator indicates the current average count.

  • Page 51: 3.2.7 Switching From Wavelength Measurement To Frequency Measurement

    8471 Optical Wavelength Meter Operation Manual 3.2.7 Switching from Wavelength Measurement to Frequency Measurement 3.2.7 Switching from Wavelength Measurement to Frequency Measurement Press the UNIT key on the DISPLAY MODE section. Wavelength measurement switches to fre- quency measurement and the unit changes from "nm" to "THz."...

  • Page 52: Measurement Of High Frequency Intensity Modulated Light And Chop Light

    Measurement of High Frequency Intensity Modulated Light and CHOP Light The 8471 can measure the wavelengths of intensity modulated light of 5 MHz or above and CHOP light of 20 Hz to 500 Hz. The measurement procedure is described below.

  • Page 53: Elevation Value Input

    8471 Optical Wavelength Meter Operation Manual 3.5 Elevation Value Input Elevation Value Input As the 8471 performs measurements in an open-air environment, the air refractive index affects the measured values. The air refractive index depends on the air density (or atmospheric pressure). The measurement results obtained from the 8471 are compensated for the air density by entering the current elevation.

  • Page 54: Useful Functions For Measurement

    8471 Optical Wavelength Meter Operation Manual 3.6 Useful Functions for Measurement Useful Functions for Measurement 3.6.1 HOLD Function Press the HOLD key. The key goes ON, measurement stops, and the display at this moment is held. To release the hold status, press the HOLD key again. The key goes OFF.

  • Page 55: 3.6.3 Resolution Keys

    8471 Optical Wavelength Meter Operation Manual 3.6.3 RESOLUTION Keys 3.6.3 RESOLUTION Keys Pressing the key decreases the display digit by one. Pressing the key increases the display digit by one. The resolution ranges that can be set are as follows:...

  • Page 56: Measurement Data Storing Function

    3.7 Measurement Data Storing Function Measurement Data Storing Function The 8471 has a function to store up to 10,000 measured data. The following shows how to operate the STORE function. Section 3.7.1 to Section 3.7.4 are a sequence of operations.

  • Page 57: 3.7.4 Data Storing Operation

    Any key other than the STORE key has no effect during data storing. To enable key operations, press the STORE key and switch to "STORE: STP" status. If the 8471 is turned OFF during data saving (when "*" is displayed following "STORE: number of data stored"), the stored data or parameter may be lost.

  • Page 58: D/A Out Setting

    8471 Optical Wavelength Meter Operation Manual 3.8 D/A OUT Setting D/A OUT Setting Analog data converted from the displayed digital data is output from the BNC connecter on the rear panel. The three lower display digits are converted to analog voltage for output.

  • Page 59: D/A Out Mode Setting

    8471 Optical Wavelength Meter Operation Manual 3.8.4 D/A Out Mode Setting Figure 3-4 Relationship between Offset Setting and D/A Output 3.8.4 D/A Out Mode Setting Press the MENU key to display the menu screen. Select 1. SETUP with the  /  /  /  keys and press the ENTER key.

  • Page 60: Initializing Setting Conditions

    Pressing the ENTER key. The display switches from EXECUTE to PRS ENTER AGAIN. Pressing the ENTER key again restores the 8471 to the factory default settings after a few seconds. However, the INFORMATION parameters in the menu are not initialized. For factory default set- tings, refer to Table 3-1 in Section 3.1.3, "Setting Status Initialization."...

  • Page 61: 3.10 Saving And Loading Parameters

    3.10 Saving and Loading Parameters This section describes the procedures of saving and loading parameters. The 8471 can save the setting parameters to and load them from the non-volatile memory, areas User 0 to User 3. The factory default settings listed in Table 3-1 are saved in User 0 to USER3 as default 3.10.1...

  • Page 62: Loading Parameters

    Select one from USER 0 to USER 3 with the  /  keys and press the ENTER. Parameters are loaded. 3.11 Menu Operation The 8471 functions and parameters are set on a hierarchical menu. This section describes the menu structure and the procedures of operating the menu. 3.11.1 Menu Structure The menu is a 2-level hierarchical structure.

  • Page 63: Parameters And Their Descriptions In Each Category

    8471 Optical Wavelength Meter Operation Manual 3.11.1 Menu Structure Figure 3-5 Parameters and Their Descriptions in Each Category 3-21...

  • Page 64: 3.11.2 Menu Functions

    8471 Optical Wavelength Meter Operation Manual 3.11.2 Menu Functions 3.11.2 Menu Functions SETUP Sets the measurement conditions. MEDIUM Selects the medium for wavelength measurement. VACUUM : Displays wavelengths in vacuum. STD AIR : Displays wavelengths in standard air (Refer to Section 3.2.6, "Standard Air Wavelength."...
  • Page 65 8471 Optical Wavelength Meter Operation Manual 3.11.2 Menu Functions MEMORY Sets the STORE function. (Refer to Section 3.7, "Measurement Data Storing Function.") STORE Sets the STORE function ON or OFF. ON : Enables the STORE function. Pressing the STORE key starts data storing.
  • Page 66 8471 Optical Wavelength Meter Operation Manual 3.11.2 Menu Functions PARAMETER Loads or saves the setting parameters. POWER_ON LOAD Selects the setting parameter condition at power ON. PWR OFF SAVE : Starts up with the parameters saved at power OFF. USER 0 : Starts up with the parameters saved in USER 0 in the non-volatile memory.
  • Page 67 Executes the self-test. "PASS" or "FAIL" is displayed after the test. When the test result is "FAIL," an error message is displayed. (Refer to Section A.2.) INFOMATION Displays the 8471 information including the firmware revision. REV. : Displays the firmware revision. S/N : Displays the serial number.

  • Page 68: Menu Operation Example (Parameter To Be Selected)

    8471 Optical Wavelength Meter Operation Manual 3.11.3 Menu Operation Example (Parameter to Be Selected) 3.11.3 Menu Operation Example (Parameter to Be Selected) As an operation example to select parameters from the menu, the procedure of setting the buzzer to ON or OFF is described below.
  • Page 69 8471 Optical Wavelength Meter Operation Manual 3.11.3 Menu Operation Example (Parameter to Be Selected) Press the ENTER key. The screen display switches to Level 2 that shows the parameters in the SYSTEM menu. Example display Level 2 SYSTEM menu Press the ENTER key.

  • Page 70: Menu Operation Example (Parameter To Be Input)

    8471 Optical Wavelength Meter Operation Manual 3.11.4 Menu Operation Example (Parameter to Be Input) 3.11.4 Menu Operation Example (Parameter to Be Input) As an operation example to change parameter values from the menu, the procedure of setting the USB ID is described below.
  • Page 71 8471 Optical Wavelength Meter Operation Manual 3.11.4 Menu Operation Example (Parameter to Be Input) Press the ENTER key. The screen display switches to Level 2 that shows the parameters in the I/F menu. Example display Level 2 I/F menu Select 3. USB ID with  /  keys and press the ENTER key.

  • Page 72: Menu Operation Example (Parameter To Be Run)

    8471 Optical Wavelength Meter Operation Manual 3.11.5 Menu Operation Example (Parameter to Be Run) 3.11.5 Menu Operation Example (Parameter to Be Run) As an operation example to run parameters from the menu, the procedure of perform initialization is described below.
  • Page 73 8471 Optical Wavelength Meter Operation Manual 3.11.5 Menu Operation Example (Parameter to Be Run) Press the ENTER key. The screen display switches to Level 2 in the PRESET menu. Example display Level 2 PRESET menu Press the ENTER key. The screen display switches to the parameter run screen.

  • Page 75: Remote Programming

    The selected interface is saved in the nonvolatile memory. The selected interface does not change when the 8471 is turned off or initialized. A unique unit address is set in the interface. If multiple instruments are connected to the USB inter-...

  • Page 76: Interface Setting Procedure

    8471 Optical Wavelength Meter Operation Manual 4.1.2 Interface Setting Procedure 4.1.2 Interface Setting Procedure This section describes the procedure of setting the interface. The setting procedures for the GPIB and USB interfaces are basically the same. The following shows the procedure of switching from the USB interface to the GPIB interface as an exam- ple.
  • Page 77 8471 Optical Wavelength Meter Operation Manual 4.1.3 Interface Setting Press the ENTER key to enter Level 2 (MENU>I/F). Select 1. BUS TYPE by using  /  keys, and press the ENTER or  key to switch to the parameter select status.

  • Page 78: Gpib

    GPIB 4.2.1 GPIB Overview GPIB (General Purpose Interface Bus) allows external control of the 8471 measurement function settings, measurement parameter settings, and reading measurement data, making it simple to configure an auto- mated measurement system. The remote commands are the same as with USB.

  • Page 79: 4.2.2 Precautions When Using Gpib

    8471 Optical Wavelength Meter Operation Manual 4.2.2 Precautions When Using GPIB 4.2.2 Precautions When Using GPIB Do not use too long a connection cable or bus cable to connect any instrument or controller. Ensure that the total cable length does not exceed 20 m.

  • Page 80: Usb

    ADC measuring instrument USB driver 3.0.0 or later 4.3.2 Connecting with Host Computer Connect the USB connector (B type) on the rear of the 8471 to the USB connector of a personal computer with a cable. Fully insert all connectors.

  • Page 81: Output Data Format

    8471 Optical Wavelength Meter Operation Manual 4.4 Output Data Format Output Data Format This section describes the format to send data from the 8471 to the external controller. Figure 4-1 Output Structure DL: Block delimiter (CR LF<EOI>, LE, or <EOI>) It can be specified by the program code "DLn."...

  • Page 82: Mantissa Part Data Format

    8471 Optical Wavelength Meter Operation Manual 4.4 Output Data Format Table 4-2 Mantissa Part Data Format Format Mode Function  < 1000.000nm   1000.000nm Wavelength CHECK _dddd.ddd LASER _ddd.ddd _d.dddddd _ddd.d _d.dddd CHOP _ddd.dd _d.ddddd (LASER) dddddd ddddddd (LED) ddd.d...

  • Page 83: Remote Commands

    When a command requires multiple data sets, data sets are separated by comma (,). A space may be used directly before or after comma (,). Describing multiple commands The 8471 allows multiple commands to be described consecutively or separated by semicolon (;), comma (,), or space ( ) in one line.

  • Page 84: Status Byte

    The 8471 has a hierarchical status register structure that conforms to the IEEE standard 488.2-1987 and can send various statuses of the 8471 to the controller. This section describes the operation model of the status structure and the allocation of events.

  • Page 85: Status Register Structure

    8471 Optical Wavelength Meter Operation Manual 4.5.2 Status Byte The following figure shows the 8471 status register structure. Figure 4-4 Status Register Structure 4-11...

  • Page 86: Status Byte Register Structure

    8471 Optical Wavelength Meter Operation Manual 4.5.2 Status Byte Event Enable Register Each Event Register has an enable register that decides which bit is to be enabled. The Enable Reg- ister sets the relevant bit in decimal values. Each Enable Register is set to 0 as default. Only the measurement event enable register is reset at power OFF.

  • Page 87: Status Byte Register (Stb)

    8471 Optical Wavelength Meter Operation Manual 4.5.2 Status Byte Table 4-3 Status Byte Register (STB) Name Description 0 MEB ON: Set to 1 when data exists after measurement is complete or query data exists. Measurement OFF: Set to 0 when the data is output.

  • Page 88: Standard Event Status Register (Sesr)

    8471 Optical Wavelength Meter Operation Manual 4.5.2 Status Byte Standard Event Status Register The following table shows the allocation of the Standard Event Status Register. Table 4-4 Standard Event Status Register (SESR) Name Description 0 OPC ON: Set to 1 when all operation is completed after receiving the *OPC command.

  • Page 89: Measurement Event Register (Mer)

    8471 Optical Wavelength Meter Operation Manual 4.5.2 Status Byte Measurement Event Register The following table shows the allocation of the Measurement Event Register. Table 4-5 Measurement Event Register (MER) Name Description 0 RCO Set to 1 when the count value of the reference beam overflows.
  • Page 90 8471 Optical Wavelength Meter Operation Manual 4.5.2 Status Byte Common conditions in which the Measurement Event Register is cleared • Cleared when the power is turned ON. • Cleared by *CLS. • Cleared when read by MSR?. Conditions in which the Measurement Event Enable Register is cleared •...
  • Page 91 8471 Optical Wavelength Meter Operation Manual 4.5.3 Remote Command Index 4.5.3 Remote Command Index Use the following remote command index for Section 4.5.4, “Remote Command List,” and Section 4.5.5, “Remote Command Correspondence List.” Remote Command Pages Remote Command Pages *CLS ............4-22 CMNT? ............
  • Page 92 8471 Optical Wavelength Meter Operation Manual 4.5.3 Remote Command Index FC0............4-19, 4-24 RD............4-20, 4-25 FC1............4-19, 4-24 RD? ............4-20, 4-25 FC2............4-19, 4-24 RE?............4-20, 4-24, FC3............4-19, 4-24 4-25 GA? ............4-19 RE0 ............4-20, 4-24, GA0............
  • Page 93 8471 Optical Wavelength Meter Operation Manual 4.5.4 Remote Command List 4.5.4 Remote Command List Table 4-6 8471 Remote Command List (1 of 5) Factory Power Parameter Class Item Header Description default OFF save save Measure- Measurement *TRG Executes SINGLE measurement operation (in HOLD).
  • Page 94 8471 Optical Wavelength Meter Operation Manual 4.5.4 Remote Command List Table 4-6 8471 Remote Command List (2 of 5) Factory Power Parameter Class Item Header Description default OFF save save Measure- AUTO mode ment MANUAL Query of the mode Response:...
  • Page 95 8471 Optical Wavelength Meter Operation Manual 4.5.4 Remote Command List Table 4-6 8471 Remote Command List (3 of 5) Factory Power Parameter Class Item Header Description default OFF save save System Reset *RST Clears the setting condition. (Corresponds to PRESET.)
  • Page 96 8471 Optical Wavelength Meter Operation Manual 4.5.4 Remote Command List Table 4-6 8471 Remote Command List (4 of 5) Factory Power Parameter Class Item Header Description default OFF save save System Status *PSC Enable register clear at power OFF. *PSCnnnnn (0 to 65535)
  • Page 97 8471 Optical Wavelength Meter Operation Manual 4.5.4 Remote Command List Table 4-6 8471 Remote Command List (5 of 5) Factory Power Parameter Class Item Header Description default OFF save save Memory STORE function STORE function OFF STORE function ON Query of the STORE function...

  • Page 98: Remote Command Correspondence List

    8471 Optical Wavelength Meter Operation Manual 4.5.5 Remote Command Correspondence List 4.5.5 Remote Command Correspondence List Table 4-7 Remote Command Correspondence List (1 of 2) Header Class Item Description 8471 Q8326 TQ8325 Measure- Operation mode ment HOLD Query of the operation mode...
  • Page 99 8471 Optical Wavelength Meter Operation Manual 4.5.5 Remote Command Correspondence List Table 4-7 Remote Command Correspondence List (2 of 2) Header Class Item Description 8471 Q8326 TQ8325 Measure- Resolution (fre- 10 MHz (laser measurement, AVG ON, AVG count of 10 or...

  • Page 100: Sample Program

    8471 Optical Wavelength Meter Operation Manual 4.6 Sample Program Sample Program This section describes program examples to remotely control the 8471 from the personal computer. If you require these sample programs, contact an ADC Corporation sales representative. http://www.adcmt.com/ Program contents Example 1 Performs wavelength measurement in the LASER mode.

  • Page 101: Technical Notes

    5. TECHNICAL NOTES TECHNICAL NOTES • Operational Principles The 8471 creates interference fringes through a Michelson interferometer and counts them to measure wavelengths of a laser or LED. The following figure shows the 8471 configuration diagram. Figure 5-1 Configuration Diagram...
  • Page 102 • Wavelength in the standard air The 8471 displays wavelengths in the standard air in addition to those in vacuum. The standard air conditions are temperature of 15C, atmospheric pressure of 1013hPa, CO2 concentra- tion of 0.03% and dry air.

  • Page 103: Performance Test

    Use the 8471 at a temperature of 23C5C Allow the 8471 warm up for at least 30 minutes after turning on the power. CAUTION: Do not input optical power of 13dBm or higher to the 8471, otherwise the input section may be broken.

  • Page 104: Wavelength Accuracy Test

    ENTER key again. The setting initialization is complete. NOTE: Be sure to initialize the 8471, otherwise correct values may not be obtained. Connecting the light source Connect the light source to the 8471 by using a single mode fiber.

  • Page 105: Test Evaluation

    6.2.3 Test Evaluation Compare the measured value and the upper and lower limits recorded on the evaluation sheet. When the 8471 does not meet the performance specification, it needs repairing or calibrating. Contact an ADC Corporation service representative. 6.2.4 Performance Test Evaluation Sheet...

  • Page 107: Specifications

    8471 Optical Wavelength Meter Operation Manual 7. SPECIFICATIONS SPECIFICATIONS Item Specification Wavelength Measurement range 630 nm to 1650 nm (182 THz to 476 THz) 2ppm 1pm (LASER measurement mode) *1 Accuracy Display resolution 1 nm to 0.0001 nm *2 *3...
  • Page 108 8471 Optical Wavelength Meter Operation Manual 7. SPECIFICATIONS Item Specification General Specifi- Operating environment Ambient temperature: +10C to +40C cations Relative humidity: 85% or lower without condensation +23C to 10C Accuracy guaranteed temperature range Storage environment Ambient temperature: -10C to +50C...

  • Page 109: Appendix

    APPENDIX A.1 When Problems Occur If any problem is encountered when using the 8471, inspect the following items before requesting repair ser- vice. If the problem cannot be solved by the suggested remedial actions, contact an ADC Corporation sales representative.

  • Page 110: A.2 Error Message List

    8471 Optical Wavelength Meter Operation Manual A.2 Error Message List A.2 Error Message List This section describes the 8471 error messages and their solutions. Error code Description ERR? command response Solution RAM read/write error RAM read/write failed Breakdown Display section RAM test/communication error...
  • Page 111 8471 Optical Wavelength Meter Operation Manual A.2 Error Message List Solution 1 When GAIN is set to MANUAL, switch it to AUTO or set it again with the DOWN key. There is a possibility of excessive input. Remove the beam to be measured from the input connector.

  • Page 113: Dimensional Outline Drawing

    DIMENSIONAL OUTLINE DRAWING EXT-1...

  • Page 115: Alphabetical Index

    ALPHABETICAL INDEX ALPHABETICAL INDEX 8471 Optical Wavelength Meter Operation Manual ALPHABETICAL INDEX [Symbol] REF MODE .......... 3-22 ELEVATION .......... 3-22 REF VALUE ........3-22 Elevation Value Input ......3-11 ENTER key ..........2-7 Environmental Conditions ...... 1-3 Error Message List ........A-2 AC power connector .......
  • Page 116 8471 Optical Wavelength Meter Operation Manual Alphabetical Index Serial number .......... 2-9 Setting Status Initialization ..... 3-3 Measurement Interval Setting ....3-14 Setting the Number of Data to be Stored 3-14 Measurement of High Frequency Intensity SETUP ............ 3-22 Modulated Light and CHOP Light ..3-10 SPECIFICATIONS .........
  • Page 117 IMPORTANT INFORMATION FOR ADC CORPORATION SOFTWARE PLEASE READ CAREFULLY: This is an important notice for the software defined herein. Computer programs including any additions, modifications and updates thereof, operation manuals, and related materials provided by ADC CORPORATION (hereafter referred to as "SOFTWARE"), included in or used with hardware produced by ADC CORPORATION (hereafter referred to as "PRODUCTS").
  • Page 118 5. EXCEPT TO THE EXTENT EXPRESSLY PROVIDED HEREIN, ADC CORPORATION HEREBY EXPRESSLY DISCLAIMS, AND THE PURCHASER HEREBY WAIVES, ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED, STATUTORY OR OTHERWISE, INCLUDING, WITHOUT LIMITATION, (A) ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE AND (B) ANY WARRANTY OR REPRESENTATION AS TO THE VALIDITY, SCOPE, EFFECTIVENESS OR USEFULNESS OF ANY TECHNOLOGY OR ANY INVENTION.

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