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PEM-320 Operation Manual

About This Manual

1. Introduction

2. Specifications

3. Features

3.1. Real Time Display

3.2. Offset Cancel

3.3. Communication Interfaces

3.4. Analogue Data Output

3.5. Stopped Polarizer Function

3.6. High Speed Measurement

4. Principle of Operation

5. Panel Descriptions

5.1. Front Panel

5.2. Rear Panel

6. Safety Information

6.1 Mains Voltage

6.2 Installation

6.3 Safe Operation

Contents

Summary of Contents for PEM-320

Page 1: ...cess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Dem...

Page 2: ...PEM 320 Polarization Extinction Ratio Meter Operation Manual...

Page 3: ...rstandable Santec shall not however be liable for errors contained herein or for incidental or consequential damages in connection with the use of this material Copyright 2000 Santec Corporation Japan...

Page 4: ...ety symbols are used throughout the manual and on the equipment to indicate safety related information DANGER CAUTION Packing Materials The original packing materials are required to ensure the safe l...

Page 5: ...Display 3 2 Offset Cancel 3 3 Communication Interfaces 3 4 Analogue Data Output 3 5 Stopped Polarizer Function 3 6 High Speed Measurement 4 Principle of Operation 5 Panel Descriptions 5 1 Front Panel...

Page 6: ...isplay Units 7 5 PER Averaging Function 7 6 Analogue Output 7 7 Changing the Optical Connector 8 Communication Interfaces 8 1 GPIB Control 8 2 RS 232C Control 8 3 Control Commands 9 Example Programs 9...

Page 7: ...PEM 320 Operation Manual...

Page 8: ...dB with a 2 5Hz refresh rate The PEM 320 simultaneously displays values for polarization extinction ratio PER optical power and polarization angle These are the three critical parameters required for...

Page 9: ...1 2 PEM 320 Operation Manual...

Page 10: ...al 4 Test report Item Unit Value Wavelength Range nm 1520 1600 power calibrated at 1550nm 0 30 when input power 30dBm 0 40 when input power 20dBm 0 1 when PER 30dB 0 3 when PER 30dB Power Measurement...

Page 11: ...2 2 PEM 320 Operation Manual...

Page 12: ...r can be displayed in units of mW or dBm The PEM 320 can be used as a stand alone bench top type measurement instrument However it also boasts industry standard GPIB and RS 232C interfaces through whi...

Page 13: ...ow The Stopped Polarizer Function provides this flexibility and enables the polarizer to be stopped at the angle of either maximum or minimum power transmission 3 5 Stopped Polarizer Function To provi...

Page 14: ...ated by a lens and after passing through a rotating polarizer is incident on the photodetector In units with the high power option fitted an optical attenuator is placed prior to the rotating polarize...

Page 15: ...d as the polarizer rotates One measurement period corresponds to a 180 rotation of the polarizer PER is calculated as the ratio of the maximum and minimum signals in any one measurement period and the...

Page 16: ...5 The power is calibrated at the center wavelength of the operating range of the PEM 320 unit i e at 980nm 1310nm 1480nm or 1550nm 3 Optical Power Unit Indicator Indicates unit of optical output power...

Page 17: ...ower Unit Selector Key 5 Pressing the GPIB Local Key a third time saves the displayed values and returns control to normal operation b Pressing this key when the power to the PEM 320 is first switched...

Page 18: ...otating the mains voltage indicator so that the correct voltage corresponding to the mains supply voltage is shown in the window when the fuse housing cover is replaced Ensure that the housing cover i...

Page 19: ...er serial number and options installed on each unit 6 GPIB Connector 7 Slit Slit for heat dissipation It is important to leave at least 5 cm of space behind the PEM 320 unit to ensure proper ventilati...

Page 20: ...age selected details are given in Section 10 3 The unit is provided with a three pin cord To ensure the safe operation of the instrument please make sure that this is connected to a grounded power out...

Page 21: ...Key Switch should be turned off immediately and the mains power turned off at the outlet Also please note that if the unit is moved from a cool location to a warm location there is a possibility that...

Page 22: ...layed in the window of the socket corresponds to the local mains voltage and plug the power cord into the socket If the correct voltage is not displayed see Section 5 2 and select the appropriate volt...

Page 23: ...ctor dark current is described in Section 7 3 The RS 232C delimiter can be changed by pressing and holding the GPIB Local or Zero keys when the power to the unit is turned on Once set the delimiter se...

Page 24: ...d consequently inaccurate measurements Before connecting the input light check that the optical power does not exceed the maximum specified level for the PEM 320 The maximum level of the standard mode...

Page 25: ...light enters the instrument and press the Zero Key to perform the Offset Cancel 7 8 Changing Display Units The Power Display Panel can display the optical power in either mW or dBm The display is tog...

Page 26: ...r the connector is detailed below 1 2 3 6 5 4 Viewed from rear of PEM 320 On PEM 320 units fitted with the option to enable monitoring of the signal directly from the photodetector Pin 2 of the AIF co...

Page 27: ...are tightened the optical connector may become damaged or misaligned 1 Unscrew the two fixing screws on either side of the optical connector socket 2 Pull the connector socket forward away from the P...

Page 28: ...settings press the GPIB Local key twice in succession To change the address press the Optical Power Unit Selector Key until the required address is displayed Pressing the GPIB Local Key a second time...

Page 29: ...e front panel The RTDX transmit terminal of the PEM 320 should be connected to the receive terminal of the external device e g computer The RRDX receive terminal of the PEM 320 should be connected to...

Page 30: ...output parameter to the required data parameter When subsequent read commands are issued the data corresponding to the set parameter is read In RS 232C communication echo back is used to verify correc...

Page 31: ...do not support echo back in RS 232C communication MF Stops polarizer rotating at point of maximum measured power MF BF Stops polarizer rotating at point of minimum measured power BF MO Starts polariz...

Page 32: ...rotating 1 Polarizer has stopped rotating 2nd digit 0 Measurement speed is set to 2 5Hz 1 Measurement speed is set to 5Hz 2 Measurement speed is set to 10Hz 3rd digit 0 Normal operation 4th digit 0 No...

Page 33: ...8 6 PEM 320 Operation Manual...

Page 34: ...rface Call ibdev 0 1 0 T10s 0 0 pem320 Open and initialise device Call ibln pem320 1 0 pem320a Check for device presence error checking gpib_dl Chr 13 Chr 10 Set Cr Lf as delimitter Read PER Subroutin...

Page 35: ...im pem320a As Integer Dimensions pem320a as integer for error checking Initialise Device Comment Call SendIFC 0 Initialise GPIB interface Call ibdev 0 1 0 T10s 0 0 pem320 Open and initialise device Ca...

Page 36: ...ead PER Subroutine Comment Form1 MSComm1 PortOpen True Open communication port MSComm1 of Form1 Form1 MSComm1 Output PE Chr HD Set output variable to PER in dB CR delimiter Form1 MSComm1 Output DI Chr...

Page 37: ...9 4 PEM 320 Operation Manual...

Page 38: ...he unit and do not operate the unit within such an environment Do not apply a voltage exceeding that indicated in the specifications 10 1 Care 10 2 Maintenance Occasional cleaning of the exterior surf...

Page 39: ...emove the mains cord from the back of the instrument and open the cover of the fuse housing using a small screwdriver Note the direction of the arrows on the end of each fuse holder The fuse holders c...

Page 40: ...TIO METER PEM 320 10 3 CAUTION Before changing the fuse always disconnect the power cord from the power outlet 100V ac remove drum before turn 100V ac 120V ac 230V ac Fuse Housing Anti Surge Fuse Fuse...

Page 41: ...10 4 PEM 320 Operation Manual...

Page 42: ...ode Note this function will not work if the Front Panel lockout command has been issued via GPIB GPIB address is not set correctly Press Local key and hold for 2 seconds to check GPIB address and set...

Page 43: ...11 2 PEM 320 Operation Manual...

Page 44: ...cation repair or attempt to repair will render this warranty VOID Santec will not be responsible for the product when the seals have been broken or damaged This warranty is effective only for the orig...

Page 45: ...12 2 PEM 320 Operation Manual...

Page 46: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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