Rifocs 577L User manual
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RIFOCS CORP 575L BENCH TOP POWER METER
i
RIFOCS CORP.
833 FLYNN ROAD
CAMARILLO, CA 93012
PH: 805 - 389 9800
FX: 805 - 389 9808
Notice of Proprietary Rights
The design concepts and engineering details embodied in this manual, which are property of
RIFOCS CORP., are to be maintained in strict confidence; no element or detail of this manual is to
be spuriously used, nor disclosed, without the express written permission of RIFOCS CORP. All
rights are reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or
otherwise, without prior written permission from RIFOCS CORP.
© COPYRIGHT 1996, RIFOCS CORP.
THIRD PRINTING, APRIL 1996, CAMARILLO CALIFORNIA
UNITED STATES OF AMERICA
DOC NO: 0575-54 REV. C
FILE: J:\PROJECTS\575L\DOC\USERMAN\MANUAL.WP
575L
POWER METER
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575L BENCH TOP POWER METER RIFOCS CORP.
ii
EC Declaration of Conformity
We RIFOCS CORPORATION
833 Flynn Road
Camarillo, CA
USA
declare under sole responsibility that the below listed Fiber Optic Instruments, manufactured in
the United States of America, meet the intent of the Directive 89/336/EEC for Electromagnetic
Compatibility. Compliance was demonstrated to the following specifications as listed in the official
Journal of the European Communities:
EN 50081-1 Emissions: EN55022 Radiated, Class B
EN 55022 Conducted, Class B
EN 60555-2 Power Harmonics
EN 50082-1 Immunity: IEC 801-2 Electrostatic Discharge
IEC 801-3 RF Radiated
IEC 801-4 Fast Transients
IEC 801-5 Surge
Instruments: Handheld 250 Series Handheld LED Sources
260 Series Handheld Laser Sources
330 Series Handheld Optical Attenuator
550 Series Handheld Optical Power Meter
Benchtop 752 Series Benchtop Dual LED Source
570 Series Benchtop Optical Power Meter
580 Series Benchtop Return Loss Meter
Modular 670 Series Optical Power Meter Modules
610 Series Nearfield/Farfield Scanner
650 Series LED Source Modules
660 Series Laser Source Modules
671 Series Universal Controller Module
680 Series Coupler/Splitter
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TABLE OF CONTENTS
1 QUICK START .........................................................................................................1-1
1.1 Front Panel Description..................................................................................1-2
1.2 Rear Panel Description ...................................................................................1-3
1.3 Secondary Functions.......................................................................................1-4
1.4 Remote Terminal Commands.........................................................................1-6
2 GENERAL INFORMATION....................................................................................2-1
2.1 Specifications..................................................................................................2-3
2.2 Specification Definitions ................................................................................2-5
2.3 Warranty Information .....................................................................................2-7
2.4 Statement of Calibration.................................................................................2-8
3 INITIAL PREPARATION ........................................................................................3-1
3.1 Unpacking And Inspection.............................................................................3-1
3.2 Damaged In Shipment ....................................................................................3-1
3.3 Standard Contents...........................................................................................3-1
3.4 Preparation For Use ........................................................................................3-1
4 FRONT PANEL OPERATION ...............................................................................4-1
4.1 Power-Up .......................................................................................................4-4
4.2 EEPROM ........................................................................................................4-4
4.3 Warm-Up Period ............................................................................................4-5
4.4 Optical Input Port (RCVR) ............................................................................4-6
4.5 How to Zero....................................................................................................4-7
4.6 Zero Drift and Minimum Light Detection .....................................................4-7
4.7 How to Select Measurement Units.................................................................4-7
4.7.1 dBm - Absolute Log Units ...............................................................................4-7
4.7.2 dB - Relative Log Units ...................................................................................4-8
4.7.3 WATT - Absolute Linear Units .......................................................................4-8
4.8 \ - Select Wavelength .....................................................................................4-8
4.9 HOLD - Autoranging / Range Hold ..............................................................4-8
4.10 ZERO - Automatic Zeroing............................................................................4-9
4.11 PRINT - Print Label .....................................................................................4-10
4.12 Secondary Functions.....................................................................................4-10
4.12.1 Secondary Functions Menu .........................................................................4-10
4.12.2 FUNCTION 1 - Selecting the Label Format .............................................4-10
4.12.3 FUNCTION 2 - Setting the Label Serial Number .....................................4-10
4.12.4 FUNCTION 3 - Setting the I2C ADDRESS ..............................................4-11
4.12.5 FUNCTION 4 - Setting the BAUD Rate....................................................4-11
4.12.6 FUNCTION 5 - Selecting Default Wavelength .........................................4-11
4.12.7 FUNCTION 6 - Selecting Default Mode ..................................................4-11
4.12.8 FUNCTION 7 - Setting the Year ...............................................................4-12
4.12.9 FUNCTION 8 - Setting the Date (day-month)...........................................4-12
4.12.10 FUNCTION 9 - Setting the Time..............................................................4-12
4.12.11 FUNCTION 10 - Selecting REF/REL+RATIO ........................................4-13
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4.12.12 FUNCTION 11 - Range Hold configuration ............................................4-15
4.12.13 FUNCTION 12 - Display Software Revision Level .................................4-16
4.12.14 FUNCTION 13 - Set dB mode configuration............................................4-17
5 SYSTEM CONFIGURATION ................................................................................5-1
5.1 Typical Systems..............................................................................................5-1
5.2 RS232 Interface ..............................................................................................5-4
5.3 I2C Bus Connections ......................................................................................5-6
6 REMOTE OPERATION ...........................................................................................6-1
6.1 Remote Commands ........................................................................................6-3
6.2 Creating and Loading Label Format Files ...................................................6-10
6.3 Data Format ..................................................................................................6-14
6.4 Using a Terminal Emulation Program with the 575L .................................6-22
6.5 Programming Example in BASIC................................................................6-23
7 APPLICATIONS ....................................................................................................... 7-1
7.1 Optical Power Measurement ......................................................................... 7-1
7.2 End-To-End Loss Measurement ....................................................................7-1
7.4 Connector and Component Loss Measurement ............................................7-5
8 THEORY OF OPERATION ..................................................................................... 8-1
8.1 Functional Description ...................................................................................8-1
8.2 Optical Detector..............................................................................................8-2
8.3 CPU Board...................................................................................................... 8-2
8.4 Display Board .................................................................................................8-4
9 ACCESSORIES......................................................................................................... 9-1
9.1 Fiber Optic Adapters ......................................................................................9-1
9.2 Rack Mount Adapter .....................................................................................9-2
10 PERFORMANCE VERIFICATION ......................................................................10-1
10.1 Environmental Conditions............................................................................10-1
10.2 Recommended Test Equipment ...................................................................10-1
10.3 Initial Conditions ..........................................................................................10-3
10.4 Equipment Set-Up .......................................................................................10-3
10.5 Verifying Calibration Accuracy...................................................................10-4
10.6 Verifying Linearity.......................................................................................10-4
10.7 Verifying Analog Output Accuracy.............................................................10-8
11 OPTICAL CALIBRATION ....................................................................................11-1
11.1 Calibration ....................................................................................................11-1
11.2 Recommended Calibration Equipment ........................................................ 11-1
11.3 Environmental Conditions............................................................................11-3
11.4 Equipment Set-Up ........................................................................................11-3
11.5 Calibration Procedure...................................................................................11-4
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12 MAINTENANCE ....................................................................................................12-1
12.1 Fuse Installation/Replacement .....................................................................12-1
12.2 Troubleshooting............................................................................................12-1
INDEX ............................................................................................................................Index-1
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LIST OF FIGURES
Figure 1-1 Front Panel Assignments............................................................................1-1
Figure 1-2 Rear Panel Assignments.............................................................................1-3
Figure 1-3 Front Panel Button Assignments................................................................1-4
Figure 1-4 Secondary Function State Diagram. ...........................................................1-6
Figure 4-1 LCD segments and annunciators................................................................4-3
Figure 4-2 Connecting the SNAP-ON Adapter. ..........................................................4-6
Figure 4-3 Error code -E2- displayed...........................................................................4-9
Figure 4-4 LCD display while in REL+RATIO mode...............................................4-13
Figure 4-5 LCD display while in REF mode. ............................................................4-14
Figure 4-6 Multi-channel ratio (A/B) measurements.................................................4-15
Figure 5-1 A single 575L controlled by a computer. ...................................................5-1
Figure 5-2 Two 575Ls controlled by a computer.........................................................5-2
Figure 5-3 Multi-channel dB ratio measurements........................................................5-2
Figure 5-4 A 575L connected to a parallel printer.......................................................5-3
Figure 5-5 RS232 Connector Pinout. ...........................................................................5-4
Figure 5-6 I2C Bus Interface Pinout.............................................................................5-6
Figure 5-7 I2C Bus Cable. ............................................................................................5-7
Figure 5-8 Parallel Printer Connector Pinout...............................................................5-7
Figure 6-1 Two 575Ls controlled by a computer.........................................................6-4
Figure 7-1 EMS Apparatus (Mandrel Wrap). ..............................................................7-2
Figure 7-2 Initial Reference Power Level....................................................................7-4
Figure 7-3 Test Cable Power Level. ............................................................................7-4
Figure 7-4 Block Diagram of Component Insertion Loss Measurement.....................7-6
Figure 8-1 Basic Components of the 575L. .................................................................8-1
Figure 10-1 Diagram of equipment set-up for calibration. ..........................................10-3
Figure 10-2 Equipment set-up for analog output verification......................................10-8
Figure 11-1 Diagram of equipment setup for calibration.............................................11-3
Figure 12-1 Fuse Installation. ......................................................................................12-1
LIST OF TABLES
Table 1-1 Secondary Function Quick Reference. .......................................................1-5
Table 1-2 Remote Command Quick Reference. .........................................................1-7
Table 1-2 Remote Command Quick Reference (continued).......................................1-8
Table 2-1 Specifications at 18°C to 25°C...................................................................2-3
Table 2-1 Specifications at 18°C to 25°C (continued). .............................................2-4
Table 2-1 Specifications at 18°C to 25°C (continued). ..............................................2-5
Table 4-1 Summary of Front Panel Functions............................................................4-1
Table 4-2 Summary of Front Panel Secondary Functions ..........................................4-2
Table 4-2 Summary of Front Panel Secondary Functions (continued).......................4-3
Table 4-3 Factory Parameters Stored in EEPROM ....................................................4-5
Table 4-4 Sensitivity Levels of the Power Meter .......................................................4-7
Table 4-5 Range Hold Configuration Options..........................................................4-16
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Table 4-6 Error Codes .............................................................................................. 4-18
Table 5-1 575L RS232 Interface Pinout..................................................................... 5-4
Table 5-2 RS232 Interface Cable. .............................................................................. 5-5
Table 5-3 Parallel Printer Connector Wiring.............................................................. 5-8
Table 6-1 Summary of Remote Commands ............................................................... 6-1
Table 6-1 Summary of Remote Commands (continued)............................................ 6-2
Table 6-1 Summary of Remote Commands (continued)............................................ 6-3
Table 6-2 Format Specifiers for Label Printing ....................................................... 6-12
Table 6-2 Format Specifiers for Label Printing (continued) .................................... 6-13
Table 6-3 575L Return String Data Format.............................................................. 6-15
Table 6-3 Return String Data Format (continued).................................................... 6-16
Table 6-3 575L Return String Data Format (continued) .......................................... 6-17
Table 6-4 575L Data Return String Examples ......................................................... 6-18
Table 6-4 575L Data Return String Examples (continued)...................................... 6-19
Table 6-4 575L Data Return String Examples (continued)...................................... 6-20
Table 6-4 575L Data Return String Examples (continued)...................................... 6-21
Table 6-4 575L Data Return String Examples (continued)...................................... 6-22
Table 8-1 Relationship of the power reading to the analog output voltage................ 8-3
Table 9-1 RIFOCS Snap-On (SOC) series adapters................................................... 9-1
Table 9-2 RIFOCS Interface Cables........................................................................... 9-2
Table 10-1 Recommended Test Equipment ............................................................... 10-2
Table 10-2 Linearity Test Chart for 780nm, 850nm................................................... 10-6
Table 10-3 Linearity Test Chart for 1300nm-1550nm. .............................................. 10-7
Table 10-4 Analog Output Accuracy Verification Chart. .......................................... 10-9
Table 11-1 Recommended Calibration Equipment. ................................................... 11-2
Table 12-1 Troubleshooting Chart ............................................................................. 12-2
Table 12-1 Troubleshooting Chart (continued).......................................................... 12-3
Table 12-1 Troubleshooting Chart (continued).......................................................... 12-4
Table 12-1 Troubleshooting Chart (continued).......................................................... 12-5
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1-1
1 QUICK START
This section will give the practiced technician an overview of the functionality of
the 575L Power Meter as well as a description of the operating procedures. A
more detailed description of the functions can be found in section 4.
Figure 1-1 Front Panel Assignments.
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1.1 Front Panel Description
(Refer to 1)
1. Power Switch
2. LCD Display - A) Main Power (Readout in WATTs or dBm)
B) Cal Wavelength (in nanometers) or Reference
Power (dB)
3. dBm/WATT - Select read-outs units in absolute dBm or Watt.
4. dB - Selects the relative dB mode.
5. PRINT - When properly interfaced to a printer, this switch will activate a
hard copy label. See section 0 for detailed operating procedures.
6. Lambda - Select calibration wavelengths. Standard settings are 780, 850,
1300, 1550nm.
7. HOLD - Pressing this button will disable amplifier autoranging. The
amplifier will be set to a range that was previously defined by accessing
secondary function #11. The HOLD button is also used to access the
secondary functions. See section 0 for accessing the secondary functions.
8. Power Detector - Connect the fiber using any of the available Snap on
Connector (SOC) adaptors.
9. Retractable Stand - Allows the user eye-to-display contact for comfortable
reading, it folds snugly to the base of the unit for easy storage and transport.
10. ZERO - Zeroes the input power detector. The input power detector must
be darkened when using this function or the error code -E2- will result.
Figure 1-2 Rear Panel Assignments.
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1.2 Rear Panel Description
1. Parallel Printer Interface - This interface allows for connection to a
printer for generation of labels and reports. Activated by the PRINT
function.
2. Serial RS-232 Interface - This interface allows for remote control of the
unit.
3. I2C Bus - The Inter-Integrated Circuit BUS interface of the 575L allows
multiple meters to be joined and addressed in series for multi channel test
applications. See also section 0 I2C Bus connector pinout.
4. Grounding Point
5. Analog Output - This BNC output provides a voltage of 0..3V
corresponding to the power level displayed.
6. Line Input - The unit accepts any line input from 100..250VAC at
50..60Hz.
7. 0.75A Fuse - Slow blow. Fuse cover is easily opened with a flat-head
screwdriver.
8. Par-Ser Printer Switch - Directs the device to output to either a parallel or
serial printer for the label printing function.
9. Cal-Run Switch - Enable calibration mode. For normal operation, this
switch should remain in the "RUN" position. For calibration, this switch
must be in the "CAL" position.
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1.3 Secondary Functions
The secondary function sequence is initiated by selecting the "HOLD" switch and
keeping it pressed for two seconds. Once the selected secondary function's
annunciator is displayed on the LCD (in small digits - ITEM 1 in 3) and the
desired parameters set (displayed on the LCD in large digits - ITEM 2 in 3), the
function is automatically initiated and the unit will now default back to those
selected functions when powered OFF and ON. (Refer to 3 and 4)
1. Secondary Function Annunciator
2. Secondary Function Parameter Annunciator
3. dBm/WATT - Decrements Parameter
4. dB - Increments Parameter
5. ZERO - Exit Secondary Function Menu
6. LAMBDA - Decrements Function
7. HOLD - Increments Function
Figure 1-3 Front Panel Button Assignments.
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Table 1-1 Secondary Function Quick Reference.
Secondary Function Description Parameter
1 Select Label Format 1..7
2 Select Label Serial Number 0..65000
3 Select I2C Address 1..16
4 Select BAUD Rate 1200,2400,4800,9600
5 Select Default Wavelength 600..1600nm
6 Select Default Mode of
Operation
dBm, WATT,
dBm+Hold,
WATT+Hold
7 Set Year 1995..2100
8 Set Date (Day & Month) DD-MM
9 Set Time 00:00..23:59
10 Select REF/REL + RATIO
Mode
11 Set Range/Hold Configuration 0..7
12 Display Software Revision
Level
13 Set dB mode configuration 1..4
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1.4 Remote Terminal Commands
The 575L can be remotely controlled with any computer having a compatible RS-
232 interface.
Format BAUD Rate - 1200,2400,4800,9600
(The 575L default BAUD Rate is 9600)
Parity - None
Bits - 8
Stop Bit - 1
(Command strings are not case sensitive)
Figure 1-4 Secondary Function State Diagram.
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Table 1-2 Remote Command Quick Reference.
COMMAND DESCRIPTION
AUTO Enable amplifier auto-ranging
AW Returns the Amps/WATT of selected wavelength
CAL Wavelength select
CH Active remote channel select
dB Relative log units
dBm Absolute log units
DEL_LAMDA Delete a wavelength register
GET_DATE Returns the date (DY-MN-YR)
GET_LBLNUM Returns the currently selected label number
GET_LOPASS Returns the state of the lopass filter
GET_MODE Returns the default operating mode
GET_SN Returns the label serial number
GET_TIME Returns the time (International format)
HOLD Disable amplifier auto-ranging
INIT_CLOCK Used after the clock battery has been replaced
LOCAL Enables the front panel buttons
LOCKOUT Disables the front panel buttons
LOPASS Turn on/off A/D low pass filter
PRINT Prints a label
RANGE Fixed amplifier range select
READ Returns the optical power
READ_LABEL Returns the indicated label format file
RECAL Recalibrate the 575L (CAL switch must be in CAL position)
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EXAMPLE 1 - Sets unit to WATT mode (Using an IBM PC compatible computer)
C:\mode com1:9600,n,8,1,p[ENTER] (Format BAUD Rate)
C:\copy con com1:[ENTER] (Enable Remote Command)
WATT [ENTER] (Watt Mode Active Command)
[CTRL][Z][ENTER] (End of file command)
Table 1-2 Remote Command Quick Reference (continued).
COMMAND DESCRIPTION
RESET Resets the 575L
RESTORE Loads the EEPROM with its default factory set parameters
SAVE Make the present operating mode the default
SET_DATE Set date (DD,MM,YYYY)
SET_LABEL Label format select
SET_MODE Sets the default operating mode
SET_SN Set label serial number
SET_TIME Set time (HH,MM)
VER Returns the software revision level
WATT Select absolute linear units
WAVE_REG Returns the currently selected wavelength register
WLEN Returns the wavelength of the indicated wavelength register
ZERO Zeros the optical input
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2-1
2 GENERAL INFORMATION
The 575L Fiber Optic Power Meter is a high performance, programmable power
meter. It is used for all general purpose light power measurements, but particularly
for fiber optic applications, in both manual and computer controlled test set-ups.
At the heart of the instrument is a high sensitivity InGaAs detector. Most
industry connectors may be interfaced to the 575L by using one of the RIFOCS
SNAP-ON (SOC) series connector adapters. Powerful interface features include an
RS232 interface which enables the 575L to be controlled from a computer, and an
Inter-Integrated Circuit (I2C) Bus which allows multiple 575Ls to be connected
together. The combination of RS232 and I2C interface makes it possible to control
multiple 575Ls with just one computer and only one RS232 port. The 575L also
offers the unique feature of allowing multi-channel ratio measurements. It is possible
to make ratio (A/B) measurements simultaneously between many channels. Up to 15
channels can be tied together making simultaneous ratio measurements against one
reference channel. The 575L can be connected to a printer via either the parallel
printer port or the RS232 interface on the unit's back panel. This feature allows the
user to get hard copies of power measurements, for example to label the losses of
connectors.
MAIN FEATURES
* Maximum Performance
(+3dBm to -80dBm)
* Absolute Power Reading Accuracy (± 0.25dB)
* Automatic Zeroing
* Ratio Measurements for up to 15 channels
* RS232 Interface for Remote Control
* Inter-Integrated (I2C) Circuit Bus Interface
* Parallel Printer Port Interface
* All Fiber Optic Wavelengths
* All Fiber Optic Connectors
* Universal Power Supply (100-250VAC, 50-60 Hz)
* Daisy Chain Capability
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2-2
APPLICATIONS
* Automatic testing for systems and components
* Connector and Coupler Evaluations
* Life testing Lasers and Components
* Measuring Splice Loss
* Measuring Attenuation
* Engineering tasks in E-O lab
* Incoming Inspection of Sources
* Loss Budget Analysis
* Quality Control
* Automated Manufacturing Tests
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2.1 Specifications
!"#$%&'() Specifications at 18°Cto 25°C(continued).
MODEL 575L 577L 578L
2.2.12 Display Custom tri-plexed liquid crystal display with 4 digit data
field and simultaneous display of cal wavelength
2.2.13 Measurement
Modes
dBm,dB,WATT
2.2.14 Optical
Connector
Interface
RIFOCS Snap-On Connector (SOC) series adapters.
2.2.15 RS232
Interface
Conforms to RS232C standard.
25 pin D connector female
2.2.16 I2C Interface Conforms to the Inter-Integrated (I2C) Circuit Bus
specification
2.2.17 Parallel Printer
Interface
Logic level: 0-5V
Drives 1 TTL load
25 pin D connector, female
2.2.18 Analog Output
Interface
0 TO 3V
(Amplifier output)
Maximum analog output load > 5k ohm
tr/tf < 0.1ms for P >= 1μW
tr/tf < 1ms for P >= 10nW
2.2.19 Line Power 100VAC TO 250VAC, 50-60 Hz
2.2.20 Warm Up
Time
5 minutes
2.2.21 Operating
Environment
Storage
Environment
-5°C to 55°C, 0-95% RH (Non-condensing)
-15°C to 70°C, 0-95% RH (Non-condensing)
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