Artisan Technology Group is your source for quality
new and certied-used/pre-owned equipment
• FAST SHIPPING AND
DELIVERY
• TENS OF THOUSANDS OF
IN-STOCK ITEMS
• EQUIPMENT DEMOS
• HUNDREDS OF
MANUFACTURERS
SUPPORTED
• LEASING/MONTHLY
RENTALS
• ITAR CERTIFIED
SECURE ASSET SOLUTIONS
SERVICE CENTER REPAIRS
Experienced engineers and technicians on staff
at our full-service, in-house repair center
WE BUY USED EQUIPMENT
Sell your excess, underutilized, and idle used equipment
We also offer credit for buy-backs and trade-ins
www.artisantg.com/WeBuyEquipment
REMOTE INSPECTION
Remotely inspect equipment before purchasing with
our interactive website at www.instraview.com
LOOKING FOR MORE INFORMATION?
Visit us on the web at www.artisantg.com for more
information on price quotations, drivers, technical
specications, manuals, and documentation
Contact us: (888) 88-SOURCE | sales@artisantg.com | www.artisantg.com
SM
View
Instra
RIFOCS CORP
575L
POWER METER
575L BENCH TOP POWER METER
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
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
i
575L BENCH TOP POWER METER
EC Declaration of Conformity
We
RIFOCS CORPORATION
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:
RIFOCS CORP.
833 Flynn Road
Camarillo, CA
USA
EN 50081-1 Emissions:
EN 50082-1 Immunity:
Instruments:
Handheld 250 Series Handheld LED Sources
Benchtop 752 Series Benchtop Dual LED Source
Modular 670 Series Optical Power Meter Modules
EN55022 Radiated, Class B
EN 55022 Conducted, Class B
EN 60555-2 Power Harmonics
IEC 801-2 Electrostatic Discharge
IEC 801-3 RF Radiated
IEC 801-4 Fast Transients
IEC 801-5 Surge
260 Series Handheld Laser Sources
330 Series Handheld Optical Attenuator
550 Series Handheld Optical Power Meter
570 Series Benchtop Optical Power Meter
580 Series Benchtop Return Loss Meter
610 Series Nearfield/Farfield Scanner
650 Series LED Source Modules
660 Series Laser Source Modules
671 Series Universal Controller Module
680 Series Coupler/Splitter
ii
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
TABLE OF CONTENTS
1 QUICK START
.........................................................................................................
1.1 Front Panel Description
1.2 Rear Panel Description
1.3 Secondary Functions
...................................................................................
.......................................................................................
1.4 Remote Terminal Commands
2 GENERAL INFORMATION
2.1 Specifications
..................................................................................................
....................................................................................
2.2 Specification Definitions
2.3 Warranty Information
.....................................................................................
2.4 Statement of Calibration
3 INITIAL PREPARATION
........................................................................................
3.1 Unpacking And Inspection
3.2 Damaged In Shipment
3.3 Standard Contents
3.4 Preparation For Use
....................................................................................
...........................................................................................
........................................................................................
4 FRONT PANEL OPERATION
4.1 Power-Up
4.2 EEPROM
4.3 Warm-Up Period
.......................................................................................................
........................................................................................................
............................................................................................
4.4 Optical Input Port (RCVR)
4.5 How to Zero
....................................................................................................
4.6 Zero Drift and Minimum Light Detection
4.7 How to Select Measurement Units
4.7.1 dBm - Absolute Log Units
4.7.2 dB - Relative Log Units
...................................................................................
4.7.3 WATT - Absolute Linear Units
4.8 \ - Select Wavelength
.....................................................................................
4.9 HOLD - Autoranging / Range Hold
4.10 ZERO - Automatic Zeroing
4.11 PRINT - Print Label
4.12 Secondary Functions
.....................................................................................
.....................................................................................
4.12.1 Secondary Functions Menu
4.12.2 FUNCTION 1 - Selecting the Label Format
4.12.3 FUNCTION 2 - Setting the Label Serial Number
4.12.4 FUNCTION 3 - Setting the I
4.12.5 FUNCTION 4 - Setting the BAUD Rate
4.12.6 FUNCTION 5 - Selecting Default Wavelength
4.12.7 FUNCTION 6 - Selecting Default Mode
4.12.8 FUNCTION 7 - Setting the Year
4.12.9 FUNCTION 8 - Setting the Date (day-month)
4.12.10 FUNCTION 9 - Setting the Time
4.12.11 FUNCTION 10 - Selecting REF/REL+RATIO
..................................................................................
.........................................................................
................................................................................
.................................................................................
.............................................................................
...............................................................................
............................................................................
.....................................................
.................................................................
...............................................................................
.......................................................................
..............................................................
............................................................................
.........................................................................
.............................................
2
C ADDRESS
.....................................
..............................................
....................................................
.........................................
..................................................
...............................................................
...........................................
..............................................................
........................................
1-1
1-2
1-3
1-4
1-6
2-1
2-3
2-5
2-7
2-8
3-1
3-1
3-1
3-1
3-1
4-1
4-4
4-4
4-5
4-6
4-7
4-7
4-7
4-7
4-8
4-8
4-8
4-8
4-9
4-10
4-10
4-10
4-10
4-10
4-11
4-11
4-11
4-11
4-12
4-12
4-12
4-13
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
iii
575L BENCH TOP POWER METER
RIFOCS CORP.
4.12.12 FUNCTION 11 - Range Hold configuration
4.12.13 FUNCTION 12 - Display Software Revision Level
4.12.14 FUNCTION 13 - Set dB mode configuration
5 SYSTEM CONFIGURATION
5.1 Typical Systems
5.2 RS232 Interface
5.3 I
2
C Bus Connections
6 REMOTE OPERATION
6.1 Remote Commands
..............................................................................................
..............................................................................................
......................................................................................
...........................................................................................
........................................................................................
6.2 Creating and Loading Label Format Files
6.3 Data Format
..................................................................................................
6.4 Using a Terminal Emulation Program with the 575L
6.5 Programming Example in BASIC
7 APPLICATIONS
.......................................................................................................
7.1 Optical Power Measurement
7.2 End-To-End Loss Measurement
7.4 Connector and Component Loss Measurement
............................................
.................................
............................................
................................................................................
...................................................
.................................
................................................................
.........................................................................
....................................................................
............................................
4-15
4-16
4-17
5-1
5-1
5-4
5-6
6-1
6-3
6-10
6-14
6-22
6-23
7-1
7-1
7-1
7-5
8 THEORY OF OPERATION
8.1 Functional Description
8.2 Optical Detector
8.3 CPU Board
8.4 Display Board
9 ACCESSORIES
......................................................................................................
.................................................................................................
.........................................................................................................
9.1 Fiber Optic Adapters
9.2 Rack Mount Adapter
.....................................................................................
...................................................................................
..............................................................................................
......................................................................................
.....................................................................................
10 PERFORMANCE VERIFICATION
10.1 Environmental Conditions
............................................................................
10.2 Recommended Test Equipment
10.3 Initial Conditions
10.4 Equipment Set-Up
..........................................................................................
.......................................................................................
10.5 Verifying Calibration Accuracy
10.6 Verifying Linearity
.......................................................................................
10.7 Verifying Analog Output Accuracy
11 OPTICAL CALIBRATION
11.1 Calibration
....................................................................................................
....................................................................................
11.2 Recommended Calibration Equipment
11.3 Environmental Conditions
11.4 Equipment Set-Up
........................................................................................
11.5 Calibration Procedure
............................................................................
...................................................................................
......................................................................
...................................................................
...................................................................
.............................................................
........................................................
8-1
8-1
8-2
8-2
8-4
9-1
9-1
9-2
10-1
10-1
10-1
10-3
10-3
10-4
10-4
10-8
11-1
11-1
11-1
11-3
11-3
11-4
iv
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
12 MAINTENANCE
12.1 Fuse Installation/Replacement
12.2 Troubleshooting
INDEX
............................................................................................................................
....................................................................................................
.....................................................................
............................................................................................
Index-1
12-1
12-1
12-1
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
v
575L BENCH TOP POWER METER
LIST OF FIGURES
RIFOCS CORP.
Figure 1-1 Front Panel Assignments.
Figure 1-2 Rear Panel Assignments.
Figure 1-3 Front Panel Button Assignments.
Figure 1-4 Secondary Function State Diagram.
Figure 4-1 LCD segments and annunciators.
Figure 4-2 Connecting the SNAP-ON Adapter.
Figure 4-3 Error code -E2- displayed.
Figure 4-4 LCD display while in REL+RATIO mode.
Figure 4-5 LCD display while in REF mode.
Figure 4-6 Multi-channel ratio (A/B) measurements.
Figure 5-1 A single 575L controlled by a computer.
Figure 5-2 Two 575Ls controlled by a computer.
Figure 5-3 Multi-channel dB ratio measurements.
Figure 5-4 A 575L connected to a parallel printer.
Figure 5-5 RS232 Connector Pinout.
Figure 5-6 I
Figure 5-7 I
2
C Bus Interface Pinout
2
C Bus Cable.
............................................................................................
Figure 5-8 Parallel Printer Connector Pinout.
Figure 6-1 Two 575Ls controlled by a computer.
Figure 7-1 EMS Apparatus (Mandrel Wrap).
Figure 7-2 Initial Reference Power Level.
Figure 7-3 Test Cable Power Level.
...........................................................................
............................................................................
...............................................................
...........................................................
...............................................................
..........................................................
..........................................................................
..............................................
............................................................
................................................
...................................................
........................................................
.......................................................
......................................................
...........................................................................
.............................................................................
..............................................................
........................................................
..............................................................
...................................................................
............................................................................
Figure 7-4 Block Diagram of Component Insertion Loss Measurement.
Figure 8-1 Basic Components of the 575L.
Figure 10-1 Diagram of equipment set-up for calibration.
Figure 10-2 Equipment set-up for analog output verification.
Figure 11-1 Diagram of equipment setup for calibration.
Figure 12-1 Fuse Installation.
......................................................................................
.................................................................
..........................................
.....................................
............................................
....................
1-1
1-3
1-4
1-6
4-3
4-6
4-9
4-13
4-14
4-15
5-1
5-2
5-2
5-3
5-4
5-6
5-7
5-7
6-4
7-2
7-4
7-4
7-6
8-1
10-3
10-8
11-3
12-1
Table 1-1 Secondary Function Quick Reference.
Table 1-2 Remote Command Quick Reference.
Table 1-2 Remote Command Quick Reference (continued).
Table 2-1 Specifications at 18°C to 25°C.
Table 2-1 Specifications at 18°C to 25°C (continued).
Table 2-1 Specifications at 18°C to 25°C (continued).
Table 4-1 Summary of Front Panel Functions.
Table 4-2 Summary of Front Panel Secondary Functions
Table 4-2 Summary of Front Panel Secondary Functions (continued)
Table 4-3 Factory Parameters Stored in EEPROM
Table 4-4 Sensitivity Levels of the Power Meter
Table 4-5 Range Hold Configuration Options
vi
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
LIST OF TABLES
.......................................................
.........................................................
..................................................................
...........................................................
.......................................................
..........................................................
......................................
.............................................
..............................................
..........................................
.......................
....................................................
1-5
1-7
1-8
2-3
2-4
2-5
4-1
4-2
4-3
4-5
4-7
4-16
RIFOCS CORP
Table 4-6 Error Codes
Table 5-1 575L RS232 Interface Pinout.
Table 5-2 RS232 Interface Cable.
Table 5-3 Parallel Printer Connector Wiring.
Table 6-1 Summary of Remote Commands
..............................................................................................
....................................................................
..............................................................................
.............................................................
...............................................................
Table 6-1 Summary of Remote Commands (continued)
Table 6-1 Summary of Remote Commands (continued)
Table 6-2 Format Specifiers for Label Printing
.......................................................
Table 6-2 Format Specifiers for Label Printing (continued)
Table 6-3 575L Return String Data Format
..............................................................
Table 6-3 Return String Data Format (continued)
Table 6-3 575L Return String Data Format (continued)
Table 6-4 575L Data Return String Examples
.........................................................
Table 6-4 575L Data Return String Examples (continued)
Table 6-4 575L Data Return String Examples (continued)
Table 6-4 575L Data Return String Examples (continued)
Table 6-4 575L Data Return String Examples (continued)
575L BENCH TOP POWER METER
............................................
............................................
....................................
....................................................
..........................................
......................................
......................................
......................................
......................................
Table 8-1 Relationship of the power reading to the analog output voltage.
Table 9-1 RIFOCS Snap-On (SOC) series adapters
Table 9-2 RIFOCS Interface Cables
Table 10-1 Recommended Test Equipment
...........................................................................
...............................................................
Table 10-2 Linearity Test Chart for 780nm, 850nm.
Table 10-3 Linearity Test Chart for 1300nm-1550nm.
Table 10-4 Analog Output Accuracy Verification Chart.
Table 11-1 Recommended Calibration Equipment.
Table 12-1 Troubleshooting Chart
.............................................................................
Table 12-1 Troubleshooting Chart (continued)
Table 12-1 Troubleshooting Chart (continued)
Table 12-1 Troubleshooting Chart (continued)
...................................................
..................................................
..............................................
..........................................
...................................................
..........................................................
..........................................................
..........................................................
...............
4-18
5-4
5-5
5-8
6-1
6-2
6-3
6-12
6-13
6-15
6-16
6-17
6-18
6-19
6-20
6-21
6-22
8-3
9-1
9-2
10-2
10-6
10-7
10-9
11-2
12-2
12-3
12-4
12-5
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
vii
575L BENCH TOP POWER METER
RIFOCS CORP.
viii
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
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.
575L BENCH TOP POWER METER
Figure 1-1 Front Panel Assignments.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
1-1
575L BENCH TOP POWER METER
1.1 Front Panel Description
(Refer to 1)
1.
2.
Power Switch
LCD Display
- A) Main Power (Readout in WATTs or dBm)
B) Cal Wavelength (in nanometers) or Reference
3.
4.
5.
dBm/WATT
- Selects the
dB
PRINT
- Select read-outs units in
relative
- 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.
Power (dB)
dB mode.
absolute
RIFOCS CORP.
dBm or Watt.
Figure 1-2 Rear Panel Assignments.
1-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
1.2 Rear Panel Description
575L BENCH TOP POWER METER
1.
2.
3.
4.
5.
6.
7.
8.
9.
Parallel Printer Interface
- This interface allows for connection to a
printer for generation of labels and reports. Activated by the PRINT
function.
Serial RS-232 Interface
- This interface allows for remote control of the
unit.
2
I
C 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 I
2
C Bus connector pinout.
Grounding Point
Analog Output
- This BNC output provides a voltage of 0..3V
corresponding to the power level displayed.
Line Input
- The unit accepts any line input from 100..250VAC at
50..60Hz.
0.75A Fuse
- Slow blow. Fuse cover is easily opened with a flat-head
screwdriver.
Par-Ser Printer Switch
- Directs the device to output to either a parallel or
serial printer for the label printing function.
Cal-Run Switch
- Enable calibration mode. For normal operation, this
switch should remain in the "RUN" position. For calibration, this switch
be in the "CAL" position.
must
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
1-3
575L BENCH TOP POWER METER
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
6.
LAMBDA
7.
HOLD
- Exit Secondary Function Menu
- Decrements Function
- Increments Function
RIFOCS CORP.
Figure 1-3 Front Panel Button Assignments.
1-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
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
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
1-5
575L BENCH TOP POWER METER
RIFOCS CORP.
Figure 1-4 Secondary Function State Diagram.
1.4 Remote Terminal Commands
The 575L can be remotely controlled with any computer having a compatible RS232 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)
1-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
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)
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
1-7
575L BENCH TOP POWER METER
RIFOCS CORP.
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
EXAMPLE 1 - Sets unit to WATT mode (Using an IBM PC compatible computer)
C:\
mode com1:9600,n,8,1,p
C:\
copy con com1:
WATT
[ENTER] (Watt Mode Active Command)
[ENTER] (Enable Remote Command)
[ENTER] (Format BAUD Rate)
[CTRL][Z][ENTER] (End of file command)
1-8
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
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 (I
together. The combination of RS232 and I
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.
2
C) Bus which allows multiple 575Ls to be connected
575L BENCH TOP POWER METER
2
C interface makes it possible to control
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 (I
2
C) 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
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
2-1
575L BENCH TOP POWER METER
* 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
RIFOCS CORP.
APPLICATIONS
2-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
2.1 Specifications
575L BENCH TOP POWER METER
!"#$%&'()
Specifications at 18°C to 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
dBm,dB,WATT
Modes
2.2.14 Optical
RIFOCS Snap-On Connector (SOC) series adapters.
Connector
Interface
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
5 minutes
Time
2.2.21 Operating
-5°C to 55°C, 0-95% RH (Non-condensing)
Environment
Storage
-15°C to 70°C, 0-95% RH (Non-condensing)
Environment
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
2-3
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 2-1
Specifications at 18°C to 25°C.
MODEL 575L 577L 578L
2.2.1 Sensor Type InGaAs Si InGaAs
2.2.2 Dynamic
+3 to -80dBm +3 to -75dBm +20 to -60dBm
Range
2.2.3 Cal
Wavelengths
780/850/1300/
1550nm
635/780/
850nm
2.2.4 Linearity ±0.05dB
2.2.5 Absolute
±0.25dB at Calibration Conditions
Accuracy
2.2.6 Stability
< ±0.02dB (10°C to 35°C)
< ±0.05dB Operating temperature range
2.2.7 Resolution Log: 0.01dB
Linear: 0.001nW,uW,mW
850/980/1300
1480/1550nm
2.2.8 Calibration
U.S.N.I.S.T
Traceability
2.2.9 Recommended
12 Months
Recalibration
Period
2.2.10 Settling Time 2 Seconds
2.2.11 Number of
10 readings per second (typical)
readings/sec
(in remote
mode)
2-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 2-1
Specifications at 18°C to 25°C (continued).
MODEL 575L 577L 578L
Weight/
Dimensions
Weight, kg (lbs)
Height x Width x Depth cm (in.)
Basic
Instrument
2.15kg (4.75 lbs.)
8 X 19 X 29cm (3.125 x 7.375 x 11.375 in.)
Shipping
Weight
3.40kg (7.5 lbs.)
15 X 28 X 38cm (5.750 x 10.75 x 14.875 in.)
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
2-5
575L BENCH TOP POWER METER
Specifications subject to change without notice.
2.2 Specification Definitions
RIFOCS CORP.
2.2.1 SENSOR TYPE:
This provides information on the type of photo detector used at
the front end of the instrument for optical power detection. Enhanced InGaAs
provides a wide Spectral Range.
2.2.2 DYNAMIC RANGE:
The measurement region where the instrument does not
deviate more than 0.5dB from the absolute linearity curve. The reference point is the
10μW power level.
2.2.3 CALIBRATION WAVELENGTHS:
(780nm,850nm,1300nm,1550nm). These are the wavelengths for which absolute
calibration data is traceable to the N.I.S.T. An absolute power reading calibration of
the power meter is performed using a source of specific wavelength (e.g. 780nm,
850nm, 1300nm, 1550nm) and a specific power level (-30.00dBm). The power
reading is adjusted and matched with the power reading of a transfer standard. This
provides absolute calibration of these wavelengths which are directly traceable to the
N.I.S.T. standard. Additional calibration wavelengths can be added by the user, the
575L can have up to a maximum of 8 calibration wavelengths. Adding additional
calibration wavelengths is done with the "RECAL" command, section 6.1.23.
The 575L is calibrated at these wavelengths
2-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
2.2.4 LINEARITY:
the ideal linear response of each 5dB change in power. The linearity specification
applies within the range of -3dBm to -65dBm at 1300nm.
575L BENCH TOP POWER METER
The power meter linearity is defined as the maximum deviation from
2.2.5 ABSOLUTE ACCURACY:
This is the total uncertainty of the transfer calibration
process. This error is referenced to the N.I.S.T. absolute calibration standard.
Specific power level, specific source wavelength, and specific temperature is
specified as qualifiers, so that one can verify this specification.
2.2.6 STABILITY:
With the 575L measuring a stable input signal, this specification
defines the maximum amount of deviation in dB units, that the 575L will measure
above or below the actual input signal.
2.2.7 RESOLUTION:
This specification defines the smallest power change the power
meter can display during the power measurement. Both LOG and LINEAR power
measurement mode resolution data is included in this specification.
2.2.8 CALIBRATION TRACEABILITY:
The detector's absolute calibration data is
directly traceable to N.I.S.T. at one wavelength and one power level.
2.2.9 RECOMMENDED RECALIBRATION PERIOD:
This is the recommended time
period for re-calibration, in order to maintain accuracy specifications.
2.2.10 SETTLING TIME:
This is the amount of time it takes for the 575L to read within
0.10dB of the actual power reading when the input power makes an instant transition from 70dBm to 0dBm.
2.2.11 READINGS PER SECOND (REMOTE MODE):
This is the maximum number
of power readings that can be read from the 575L in one second.
2.2.12 DISPLAY:
The size and type of display is defined in this field. All annunciators and
units of measurements are also described in this field.
2.2.13 MEASUREMENT MODES:
The 575L can measure light in absolute log units
(dBm), relative units (dB) and absolute linear units (mW, μW,nW).
2.2.14 OPTICAL INPUT INTERFACE:
This field provides information of the type of
connector interface that is available with the 575L power meter.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
2-7
575L BENCH TOP POWER METER
RIFOCS CORP.
2.2.15 RS232 INTERFACE:
The RS232 Interface of the 575L provides a means of
transmitting and receiving data between a host computer or a printer. Serial communication
is popular because most computers have at least one serial port. For examples of how the
RS232 interface is used see section 5.2.
2.2.16 I
2
C INTERFACE:
The Inter-Integrated I
2
C Circuit Bus Interface of the 575L
provides a means of connecting multiple 575Ls together on a bus. For examples of how the
2
C Bus is used see section 5.3.
I
2.2.17 PARALLEL PRINTER INTERFACE:
The parallel printer interface is for
printing labels. For a pinout diagram of the parallel printer interface see 5-8 and 5-3.
2.2.18 ANALOG OUTPUT INTERFACE:
The analog output provides an electrical
signal which can be used to monitor the optical input signal. The analog output signal is
calibrated to the power reading being displayed. The connection to the Analog Output is
made via a BNC connector.
2.2.19 LINE POWER
This specification defines the AC line voltage requirements
necessary to operate the 575L.
2.2.20 WARM UP TIME:
The 575L must be powered on for this time in order to conform
with all the specifications.
2.2.21 ENVIRONMENTAL:
OPERATING TEMPERATURE: This is the temperature range in which the 575L
will conform to the specifications after the specified warm up time.
STORAGE TEMPERATURE: This is the temperature range at which the instrument
can be stored with the power off, without any damage or any loss of specification to
the instrument. It is required that the instrument be brought back to within the
operating temperature range before it is turned on.
HUMIDITY: The relative non-condensing humidity levels allowed in the operating
temperature range.
2.3 Warranty Information
RIFOCS Corp. warrants this product to be free from defects in material and
workmanship for a period of 1 (one) year from date of shipment. During the
warranty period we will, at our option, either repair or replace any product that
proves to be defective. To exercise this warranty, write or call your local RIFOCS
Corp. Representative, or contact RIFOCS Corp. Headquarters. You will be given
prompt assistance and return instructions. Send the instrument, transportation
prepaid, to the indicated service facility. Repairs will be made and the instrument
returned, transportation prepaid. Repaired products are warranted for the balance of
the original warranty period, or at least 90 days.
2-8
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
This warranty does not apply to defects resulting from unauthorized modification or
misuse of any product or part. This warranty also does not apply to fuses or AC line
cords.
This warranty is in lieu of all other warranties, expressed or implied, including any
implied warranty of merchantability of fitness for a particular use. RIFOCS Corp.
shall not be liable for any indirect, special or consequent damages.
2.4 Statement of Calibration
This instrument has been inspected and tested in accordance with specifications
published by RIFOCS Corp. The accuracy and calibration of this instrument is
traceable to the N.I.S.T. through equipment which is calibrated at planned intervals
by comparison to certified standards.
575L BENCH TOP POWER METER
Limitation of Warranty
The instrument should be calibrated annually in order to maintain specifications.
This provides the basis for an effective quality assurances/standards program. These
services are available for RIFOCS products for a nominal fee
.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
2-9
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
3 INITIAL PREPARATION
This section provides information needed for incoming inspection and preparation
for use.
3.1 Unpacking And Inspection
The unit was carefully inspected, mechanically, electrically and optically before
shipment. When received, the shipping carton should contain the items listed in
section 0. Account for and inspect each item. In the event of a damaged instrument,
write or call RIFOCS Corp. in Camarillo, California. Please retain the shipping
container in case re-shipment is required for any reason.
3.2 Damaged In Shipment
All instruments are insured F.O.B. Camarillo when shipped by RIFOCS. If you
receive a damaged instrument you should:
1) Report the damage to your shipper immediately.
2) Inform RIFOCS Corporation.
3) Save all shipping cartons.
575L BENCH TOP POWER METER
Failure to follow this procedure may affect your claim for compensation.
3.3 Standard Contents
1 Model 575L Fiber Optic Power Meter
1 SOC Adapter per specification
1 Certificate of Calibration and Metrology Report
1 Linearity Plot
1 Instruction Manual for Model 575L
1 AC line cord (compatible with available AC line)
1 Package of 0.75 amp fuses containing 2 each
1 Warranty Registration Card (mail immediately after checking out the unit)
3.4 Preparation For Use
The 575L Fiber Optic Test Set is shipped ready for use. The instrument is powered
from the AC line (100-250VAC, 50-60Hz). See section 0 for additional information
.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
3-1
575L BENCH TOP POWER METER
RIFOCS CORP.
3-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
4 FRONT PANEL OPERATION
This section includes operating instructions such as: front and rear panel controls,
and receiver connections. Refer to the following reference Table concerning the
available front panel commands:
575L BENCH TOP POWER METER
Table 4-1
Summary of Front Panel Functions.
COMMAND KEY DESCRIPTION SECTION
dBm Absolute Log Units (dbm) 4.7.1
dB Relative Log Units (dB) 4.7.2
WATT Absolute Linear Units (Watts) 4.7.3
\ Select Wavelength 4.8
HOLD Amplifier Range Hold Function 4.9
ZERO Zero Detector 4.10
PRINT Print Label 4.11
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-1
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 4-2
Secondary Function
Number
Summary of Front Panel Secondary Functions
Secondary Function
Parameter Section
Description
1 Select Label Format 1-7 4.12.2
2 Select Serial
0-65,535 4.12.3
Number
3 Set I2C Address 1-16 4.12.4
4 Set BAUD Rate 1200, 2400, 4800,
9600
5 Select Default
Wavelength
Any
calibrated
wavelength
6 Set Default Mode dBm, Watt,
dBm+Hold,
Watt+Hold
7 Set Year 1993-2100 4.12.8
4.12.5
4.12.6
4.12.7
8Set Date
1-1 to 31-12 4.12.9
(dd-mm)
9Set Time
0:00 - 23:59 4.12.10
(international)
10 Select
REF/REL+RATIO
Mode
REF mode,
REL+RATIO mode
neither mode
4.12.11
4-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 4-2
Secondary Function
Number
Summary of Front Panel Secondary Functions (continued)
Secondary Function
Description
11 Select the various
Default Range Hold
Configurations
12 Display the
software revision
level
13 dB mode
configuration
Parameter Section
0-7 4.12.12
none 4.12.13
1-4 4.12.14
For Model 575L front and rear panel illustrations refer to 1 and 2. For references to
the Model 575L custom LCD, refer to 1 showing all segments and annunciators.
Figure 4-1 LCD segments and annunciators.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-3
575L BENCH TOP POWER METER
RIFOCS CORP.
4-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
4.1 Power-Up
The internal power supply of the Model 575L operates from an AC line voltage in
the range of 100-250VAC 50-60Hz. For fuse replacement refer to 1
Ground the instrument through a properly earth grounded
receptacle before AC operation. Failure to ground the
instrument can result in severe injury or death in the event
of short circuit or malfunction.
The POWER ON/OFF switch operates on the rocker principle. Pressing the upper
portion turns the instrument on. Pushing the lower portion turns the instrument off.
Immediately after turning on the power the upper field of the display will show
"575L" and the lower field of the display will show the software revision level. The
575L will then display the power reading in dBm or WATT units depending on the
default mode of operation.
575L BENCH TOP POWER METER
WARNING
4.2 EEPROM
The power-on values of various system parameters, the label formats and the current
calibration data is stored in the EEPROM. The EEPROM allows storage of these
values even after the 575L is turned off, and can retain these values for several years.
The 575L checks the EEPROM during its power-up self test. If for some reason the
EEPROM loses any of its memory, the 575L will display error code -E1-. Pressing
the
[PRINT]
EEPROM.
If the CAL/RUN switch, located on the 575L rear panel, is in the CAL
position all calibration data will be overwritten with dummy values, thus the
unit will need to be recalibrated. If the CAL/RUN switch is in the RUN
position the calibration data will not be overwritten.
button will clear the error and write factory default data to the
NOTE
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-5
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 4-3
Factory Parameters Stored in EEPROM
INSTRUMENT FUNCTION DESCRIPTION RESTORE DEFAULT
VALUES
Display Units dBm or WATT Units dBm
Cal Wavelengths Pre-Defined Cal Register
Values (Up to 8)
(#1) 780nm
(#2) 850nm
(#3) 1300nm
(#4) 1550nm
I2C Address I2C Bus Address 1
Serial Number Auto Incrementing Serial
10101
Numbers for Label
Printing
Label Format User-Defined Label
1
Formats (7 Label Formats
Possible)
RS232 BAUD Rate Data Rate of the RS232
9600 BAUD
Interface
Zero Software Zero Value
Range Hold Amplifier Range Hold
Mode
Range Hold Configuration 8 Possible Range Hold
Configurations
(0 to 7)
4.3 Warm-Up Period
The Model 575L requires a minimum of 5 minutes to stabilize after the power has
been turned on, or if there is a change in ambient temperature. Then proceed to
section 0 and follow the procedures for zeroing the instrument.
Off
0
4-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Figure 4-2 Connecting the SNAP-ON
4.4 Optical Input Port (RCVR)
Fiber Optic connections to the optical input of the 575L are via the SNAP-ON series
of Fiber Optic Adapters, see 2. A substantial amount of force is required to install
and remove the SNAP-ON Fiber Optic Adapter. Consult section 0 for a complete list
of Fiber Optic Adapters available from RIFOCS Corporation.
Adapter.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-7
575L BENCH TOP POWER METER
4.5 How to Zero
RIFOCS CORP.
Completely darken the optical input of the 575L and press the
575L will show -00- in the upper field of the display while it zeros the receiver.
When zeroing is complete the
will disappear. If the optical input is not
-00-
completely darkened, ie. power > -56 dBm, the 575L will display error code
Press the
[dBm/WATT]
button to clear this error.
4.6 Zero Drift and Minimum Light Detection
The minimum resolvable light level specification and the most sensitive scale
resolution is given in 4. When operating on the most sensitive range at the minimum
specified light level, changes in ambient temperature (> 20°C) may require the 575L
to be stabilized and re-zeroed.
Table 4-4
Sensitivity Levels of the Power Meter
MODE MINIMUM
RESOLVABLE POWER
[ZERO]
button. The
MOST SENSITIVE
RANGE DISPLAY
RESOLUTION
-E2-
.
WATT 0.001nW 0.001nW
dBm -90.00dBm 0.01dBm
4.7 How to Select Measurement Units
This section describes how to select the appropriate optical power measurement
units. The user may select either absolute units in dBm or WATTS, or relative units
in dB.
4.7.1 dBm - Absolute Log Units
Press the
[dBm/WATT]
button to toggle between absolute power units in dBm or
WATT, referenced to the current calibration wavelength. The dBm mode provides
an absolute measurement of the incoming optical signal level referenced to the
current calibration wavelength (displayed in the lower field of the LCD, below the
power reading). Underrange or overrange is indicated by
respectively.
"LO"
or
"HI"
,
4-8
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
4.7.2 dB - Relative Log Units
This is the mode for fiber attenuation measurements and connector/splice loss
measurements. The user must first be in either the dBm or dB display mode. Pressing
the [dB] button will cause the power meter to sample the incoming dBm signal level,
store this value internally, and subtract this reference dBm value from the dBm
signal level of subsequent inputs. There must be a valid reading on the display to
enter the dB mode. The 575L cannot be displaying LO or HI at the time the [dB]
button is pressed. Initially, the display value is 0.00 dB because the incoming signal
is equal to the reference signal at this time. The dBm reference power level is shown
in the lower field of the LCD for easy reference. Maximum display range is ±95.00
dB as long as the maximum power limits are not exceeded. Underrange and
overrange are displayed as
If
"LO"
or
"HI"
"LO"
is displayed the 575L might be in the range hold mode.
4.7.3 WATT - Absolute Linear Units
and
NOTE
, respectively.
"HI"
575L BENCH TOP POWER METER
Pressing the [dBm/WATT] button will toggle between WATT and dBm power
measurements. When WATT mode is selected, absolute power units in milliwatt
(mW), microwatt (μW), and nanowatt (nW) will be used to display the current
reading. The 575L will automatically select the units (mW,μW,nW) which provide
the highest display resolution. Overrange is indicated by
4.8 \ - Select Wavelength
Whenever the
button is pressed, the cal wavelength for the next cal register is
[\]
selected. Each time the button is pressed, both the cal wavelength and the optical
power data fields on the LCD are updated with respect to the new cal wavelength.
Up to 8 cal wavelengths can be directly accessed by the operator using this button.
4.9 HOLD - Autoranging / Range Hold
The HOLD function allows the user to control the internal operation of the Amplifier
circuitry. Pressing the
[HOLD]
button will toggle the unit between the amplifier
range hold mode and the amplifier autoranging mode. Depending on the
configuration of the range hold function (see section 0), pressing the
will do one of the following : disable autoranging and hold the amplifier on its
current range of amplification; or disable autoranging and set the amplifier to a
predefined range of amplification.
"HI"
.
[HOLD]
button
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-9
575L BENCH TOP POWER METER
4.10 ZERO - Automatic Zeroing
RIFOCS CORP.
Figure 4-3 Error code -E2- displayed
.
The 575L is capable of automatically zeroing its detector. The 575L must be zeroed
in order to measure low light levels. (See section 0). To zero the 575L completely
darken the optical input and press the
[ZERO]
button. The 575L will show -00- in
the upper field of the display while it zeros the receiver. When zeroing is complete
the
display error code
will disappear. If the optical input is not completely darkened the 575L will
-00-
. Press the
-E2-
[dBm/WATT]
button to clear this error from the
display.
NOTE
ZERO should not be confused with dB relative
mode.
4-10
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
4.11 PRINT - Print Label
The 575L has the capability of taking a reading from the display and printing that
reading on a label. To do this the 575L must be connected to a printer. The
serial/parallel switch on the back panel of the 575L must be in the parallel position if
printing to a parallel printer or in the serial position if printing to a serial printer.
It is assumed that the user has already selected a default label
format. The default label format can be set to 1 of 7 possible
formats. The process for setting the default label format is
covered in section 0. To create a label format it is necessary to
connect the 575L to a computer over the RS232 interface. The
label format is created on the computer and then down loaded
to the 575L. The process for creating label formats is covered
in section 6.2.1.
4.12 Secondary Functions
575L BENCH TOP POWER METER
NOTE
4.12.1 Secondary Functions Menu
For an explanation of how to access and select the secondary functions see section
1.3.
4.12.2 FUNCTION 1 - Selecting the Label Format
The 575L has the capability of printing hard copies (labels) to a parallel or serial
printer. The user can store up to 7 different labels in the 575L's non-volatile memory.
Each label can have its own unique format. To select a label format go into the
secondary functions menu, select secondary function number 1. Press the [dB]
button or the [dBm/WATT] button until the desired label format number is displayed
on the parameter field of the LCD.
4.12.3 FUNCTION 2 - Setting the Label Serial Number
To set a 5 digit user definable label serial number enter into the secondary functions
menu. Select secondary function number 2. Press the [dBm/WATT] button or the
[dB] button until the desired serial number is displayed on the parameter field of the
LCD. (NOTE: each time a serial number is printed it is incremented.)
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-11
575L BENCH TOP POWER METER
2
4.12.4 FUNCTION 3 - Setting the I
2
To set the I
C address (remote address) enter into the secondary functions menu.
C ADDRESS
Select secondary function number 3. Press the [dBm/WATT] button or the [dB]
button until the desired I
2
C address is displayed on the parameter field of the LCD.
(NOTE: each 575L that is connected to the I
address.) Valid addresses are 1-16. The default I
factory is 1.
4.12.5 FUNCTION 4 - Setting the BAUD Rate
To set the BAUD Rate of the 575L's RS232 interface port, enter into the secondary
functions menu. Select secondary function number 4. Press the [dBm/WATT] button
or the [dB] button until the desired BAUD Rate is displayed on the parameter field
of the LCD. The 575L's RS232 interface uses the following communications
parameters: 8 data bits, 1 stop bit, no parity. The default BAUD Rate as shipped
from the factory is 9600.
RIFOCS CORP.
2
C bus must have its own unique
2
C address as shipped from the
4.12.6 FUNCTION 5 - Selecting Default Wavelength
The default wavelength of the 575L is the wavelength that is displayed on the LCD
when the unit is powered on. To set the default wavelength enter into the secondary
functions menu. Select secondary function number 5. Press the [dBm/WATT] button
or the [dB] button until the desired wavelength is displayed on the parameter field of
the LCD. The default wavelength as shipped from the factory is 1300nm.
4.12.7 FUNCTION 6 - Selecting Default Mode
To set the default mode of operation enter into the secondary functions menu. Select
secondary function number 6. Press the [dBm/WATT] button or the [dB] button
until the desired parameters are displayed on the parameter field of the LCD. (The
default mode as shipped from the factory is dBm)
4-12
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
4.12.8 FUNCTION 7 - Setting the Year
To set the year that is stored in the 575L's internal clock/calendar enter into the
secondary functions menu. Select secondary function number 7. Press the
[dBm/WATT] button or the [dB] button until the desired year is displayed on the
parameter field of the LCD.
4.12.9 FUNCTION 8 - Setting the Date (day-month)
To set the date (day and month) that is stored in the 575L's internal clock/calendar
enter into the secondary functions menu. Select secondary function number 8. Press
the [dBm/WATT] button or the [dB] button until the desired date is displayed on the
parameter field of the LCD.
4.12.10 FUNCTION 9 - Setting the Time
To set the time of the 575L's internal clock/calendar enter into the secondary
functions menu. Select secondary function number 9. Press the [dBm/WATT] button
or the [dB] button until the desired time is displayed on the parameter field of the
LCD. Note that the time is displayed in the international time format. (00.00-23.59)
575L BENCH TOP POWER METER
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-13
575L BENCH TOP POWER METER
4.12.11 FUNCTION 10 - Selecting REF/REL+RATIO
Figure 4-4 LCD display while in REL+RATIO mode.
RIFOCS CORP.
The ratio secondary function allows the user to make ratio (A/B) measurements
between as many as 15 different channels (units). This is accomplished by setting
one 575L as the reference
reference unit with the I
as relative
(REL+RATIO)
2
C cable. The units connected to the reference unit are set up
(REF)
unit, and then connecting from 1 to 15 units to that
units. When the REL+RATIO mode is selected the unit
enters the dB mode. The dB reading displayed will be the ratio (A/B) of the light
coming into that unit compared to the reference unit. For example, if the reference
unit had -10.00 dBm coming into it, and a relative unit had -15.00 dBm coming into
it, the relative unit would show -5.00 dB in the upper field of the LCD, and 15.00
dBm in the lower field of the LCD. There can be only one reference unit. The ratio is
always taken between the dBm reading of a particular unit compared to the reference
unit. To take ratio measurements proceed as follows:
1) Connect the I
2
C cable between all units.
2) Set up one unit as the reference unit. (The REF annunciator of the LCD is on)
If more than one unit has been set up as a reference unit, the E5 error code
will be displayed on the LCD.
3) Set up the other units as relative units. (The REL+RATIO annunciators of the
LCD are on)
4) Each unit, other than the reference unit, will now continuously display the dB
ratio of its power compared to the reference. In addition the relative unit's
power will be displayed in the secondary field of the display (4). The
reference unit will appear to be in normal dBm mode except the
REF
annunciator will be on. (see 4-5)
4-14
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
5) If a relative unit stops receiving a signal from the reference unit, it will show
the E4 error code on the LCD. This can occur if the reference unit is not in
the
Figure 4-5 LCD display while in REF mode.
mode or the I
REF
575L BENCH TOP POWER METER
2
C cable is not connected.
To put the 575L into the reference mode enter into the secondary functions menu.
Select secondary function number 10. Press the [dBm/WATT] button or the [dB]
button until the
annunciator is displayed on the LCD. To put the 575L into the
REF
relative mode press the [dBm/WATT] button or the [dB] button until the
REL+RATIO
annunciators are displayed on the LCD. To take the 575L out of the
REF or REL+RATIO mode press the [dBm/WATT] button or the [dB] button until
neither the REL or REL+RATIO annunciators are displayed on the LCD.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-15
575L BENCH TOP POWER METER
Figure 4-6 Multi-channel ratio (A/B) measurements.
RIFOCS CORP.
4.12.12 FUNCTION 11 - Range Hold configuration
The Range Hold function can be configured to operate in two different modes. In the
1st mode, when the
[HOLD]
button is pressed the amplifier will stop autoranging
and the amplifier will operate on the current range of amplification. In the 2nd mode,
when the
[HOLD]
button is pressed the amplifier will stop autoranging and the
amplifier will be set to a predefined range of amplification. (Range 1-7) If the
[ZERO]
(exit) button is pressed while in secondary function 11, the range hold
function will be configured according to the parameter that is shown on the display.
Refer to 5 for an explanation of the parameters. If the
pressed while in secondary function 11, the range hold configuration will not be
changed.
[ZERO]
(exit) button is not
4-16
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 4-5
Range Hold Configuration Options
Parameter Description
0
When the
autoranges to find the optimum range, then the
amplifier is held on this range of amplification.
1
When the
autoranging is disabled and the amplifier is set to
range 1.
2
When the
autoranging is disabled and the amplifier is set to
range 2.
3
When the
autoranging is disabled and the amplifier is set to
range 3.
4
When the
autoranging is disabled and the amplifier is set to
range 4.
[HOLD]
[HOLD]
[HOLD]
[HOLD]
[HOLD]
button is pressed the amplifier
button is pressed amplifier
button is pressed amplifier
button is pressed amplifier
button is pressed amplifier
Measurable input
power level
@1300nm
Depends on the
unit's range of
amplification.
900μW to 2mW
90μW to 1.5mW
9μW to 150μW
900nW to 15μW
5
When the
[HOLD]
button is pressed amplifier
autoranging is disabled and the amplifier is set to
range 5.
6
When the
[HOLD]
button is pressed amplifier
autoranging is disabled and the amplifier is set to
range 6.
7
When the
[HOLD]
button is pressed amplifier
autoranging is disabled and the amplifier is set to
range 7.
4.12.13 FUNCTION 12 - Display Software Revision Level
To display the software revision level enter into the secondary functions menu.
Select secondary function number 12. The software revision level will be displayed
on the parameter field of the LCD. The [dBm/WATT] button and the [dB] button are
not used for this secondary function.
90nW to 1.5μW
9nW to 150nW
1nW to 15nW
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-17
575L BENCH TOP POWER METER
4.12.14 FUNCTION 13 - Set dB mode configuration
The 575L has four different dB modes. By accessing secondary function 13 the
operator can configure the instrument to operate in the desired dB mode. The dB
modes operate as follows:
dB mode #1 - Selecting a parameter value of 1 for secondary function 13 configures
the instrument for dB mode 1. This is the standard dB mode that is used for making
insertion loss measurements. This is the dB mode that must be used when the
instrument is used with a 585RL or a 586RL. When the [dB] button of the 575L is
pressed the optical power is measured and becomes the dB reference.
dB mode #2 - Selecting a parameter value of 2 for secondary function 13 configures
the instrument for dB mode 2. This configuration is used when the instrument is
used with the 588RL. When the instrument is in dB mode 2, pressing the [dB] button
sends a command to the 588RL to turn on its 1300nm laser. The 575L will wait 5
seconds for the laser to stabilize. Then the input power is measured and becomes the
1300nm dB reference.
RIFOCS CORP.
dB mode #3 - Selecting a parameter value of 3 for secondary function 13 configures
the instrument for dB mode 3. This configuration is used when the instrument is
used with the 588RL. When the instrument is in dB mode 3, pressing the [dB] button
sends a command to the 588RL to turn on its 1550nm laser. The 575L will wait 5
seconds for the laser to stabilize. Then the input power is measured and becomes the
1550nm dB reference.
dB mode #4 - Selecting a parameter value of 4 for secondary function 13 configures
the instrument for dB mode 4. This configuration is used when the instrument is
used with the 588RL. When the instrument is in dB mode 4, pressing the [dB] button
sends a command to the 588RL to turn on its 1300nm laser. The 575L will wait 5
seconds for the laser to stabilize, then the input power is measured and becomes the
1300nm dB reference. Then the 575L sends a command to the 588RL to turn on its
1550nm laser. The 575L will wait 5 seconds for the laser to stabilize, then the input
power is measured and becomes the 1550nm dB reference.
4.13 Error Codes
When the 575L detects an error condition during its operation, the error will be
indicated by the appropriate error message being displayed on the 575L's LCD
display. 3 shows the LCD display while displaying an error code. 5 lists the error
codes that are displayed on the LCD and what they mean. For information on how to
recover from an error condition see section 12.2.
4-18
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 4-6
ERROR
Error Codes
CONDITION
CODE
E1 EEPROM chip is bad. Contact factory for repair.
E2 Zeroing error. Optical input port not completely darkened.
E3 ROM chip is bad. Contact factory for repair.
E4 A relative REL+RATIO unit has stopped receiving a signal from the reference REF
unit.
E5 More than one unit configured as a reference REF unit while trying to take multi-
channel dB ratio measurements.
E6 The attempted recalibration did not complete successfully. Too much light received
at optical input. See section 11.
E7 The attempted recalibration did not complete successfully. Not enough light
received at optical input. See section 11.
E8 The attempted recalibration did not complete successfully. The CAL/RUN switch is
not in the CAL position. See section 11.
E9 This error indicates that the EEPROM lost some of its data. The factory default
values will be loaded into EEPROM. The calibration data stored in EEPROM is not
affected.
E26 When the 575L is operated with a 588RL, the 575L must be set to I2C address 2.
The 588RL must be set to I
2
C address 1.
E27 This error occurs when a 588RL is unable to retrieve an insertion loss measurement
from the 575L, because the user has not yet taken the dB reference with the 575L.
E28 This error is reported if the 575L is not configured to be operated with a 588RL.
Access secondary function #13 and configure the 575L for dB mode 4.
E29 This error is reported if the 575L is being used with a 585RL/586RL or 588RL, but
is not calibrated at 1300nm or 1550nm.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
4-19
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
5 SYSTEM CONFIGURATION
The 575L is equipped with an RS232 interface, an I2C Bus interface, and a parallel
printer interface. The RS232 interface makes it possible to control the 575L from a
remote computer. The I
together. The printer interface enables the user to print hard copies of power readings
and other information to a parallel printer. This section deals with the RS232, I
interface, and parallel printer connections.
5.1 Typical Systems
2
C interface makes it possible to connect multiple 575Ls
575L BENCH TOP POWER METER
2
C
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Figure 5-1 A single 575L controlled by a
computer.
5-1
575L BENCH TOP POWER METER
Figure 5-2 Two 575Ls controlled by a
RIFOCS CORP.
computer.
Figure 5-3 Multi-channel dB ratio
5-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
measurements.
RIFOCS CORP
575L BENCH TOP POWER METER
Figure 5-4 A 575L connected to a
parallel printer.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
5-3
575L BENCH TOP POWER METER
5.2 RS232 Interface
RIFOCS CORP.
Table 5-1
575L RS232 Interface Pinout.
PIN NUMBER DESCRIPTION DIRECTION
Pins 1, 8-19, 21-25 No Connection
Pin 2 RxD Input (to 575L)
Pin 3 TxD Output (from 575L)
Pin 4 RTS Input
Pin 5 CTS Output
Pin 6 DSR Output (This line is
always +9V)
Pin 7 Ground
Pin 20 DTR Input
Figure 5-5 RS232 Connector Pinout.
The 575L RS232 interface is designed to communicate using 8 data bits, 1 stop bit,
no parity. 1 and 5 show how the RS232 interface is wired. The 575L uses the
CTS/RTS handshaking lines for flow control, the XON/XOFF protocol is not
supported. 2 shows how the cable, for connecting between a PC compatible
computer and the 575L, is wired.
5-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 5-2
RS232 Interface Cable.
Host PC
Cable Connector Pin
SIGNAL
PC / XT
(FEMALE
DB-25)
PC / AT
(FEMALE
DB-9)
2 3 >> Data to 575L 2 RxD
Cable
575L Cable
Connector
(Male DB-25)
Signal
Pin
TxD
RxD 3 2 << Data to Host 3 TxD
RTS 4 7 Handshake 4 RTS
CTS 5 8 Handshake 5 CTS
DSR 6 6 << DSR to Host 6 DSR
GND 7 5 7 GND
DTR 20 4 >> DTR to 575L 20 DTR
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
5-5
575L BENCH TOP POWER METER
2
5.3 I
C Bus Connections
2
The I
C interface is wired as shown in 6. The I2C Bus cable is shown in 6.
RIFOCS CORP.
Figure 5-6 I2C Bus Interface Pinout
5-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
Figure 5-7 I2C Bus Cable.
575L BENCH TOP POWER METER
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
5-7
575L BENCH TOP POWER METER
2
The I
C Bus cable is not compatible with the wiring of the standard modular
telephone jack cables.
Figure 5-8 Parallel Printer Connector
RIFOCS CORP.
NOTE
Pinout.
5-8
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 5-3
PIN
Parallel Printer Connector Wiring.
PIN DESCRIPTION DIRECTION
NUMBER
1 !Strobe Output
2 Data 1 Output
3 Data 2 Output
4 Data 3 Output
5 Data 4 Output
6 Data 5 Output
7 Data 6 Output
8 Data 7 Output
9 Data 8 Output
10 !Ack Input
11 Busy Input
12 Ground
13 No Connection
14 No Connection
15 No Connection
16 No Connection
17 No Connection
18-25 Ground
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
5-9
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
6 REMOTE OPERATION
575L BENCH TOP POWER METER
Table 6-1
Summary of Remote Commands
COMMAND DESCRIPTION PARAMETER SECTION
AUTO Select autoranging None 6.1.1
AW Returns the AMPS/WATT value
1-8 6.1.2
of the specified wavelength
register
CAL Wavelength select +,-,(600-1600) 6.1.3
CH Send remote commands to the
specified I
2
C address
1-16 6.1.4
DB Select relative log units None 6.1.5
DBM Select absolute log units None 6.1.6
DEL_LAMDA Deletes the calibrated wavelength
1-8 6.1.7
of the specified wavelength
register
GET_DATE Returns the date (dd-mm-yyyy) None 6.1.8
GET_LBLNUM Returns the currently selected
None 6.1.9
label number
GET_LOPASS Returns the state of the lopass
None 6.1.10
filter (on/off)
GET_MODE Returns the default operating
None 6.1.11
mode
GET_SN Returns the label serial number None 6.1.12
GET_TIME Returns the time (International
None 6.1.13
format)
HOLD Select range hold None 6.1.14
INIT_CLOCK Used after the clock battery has
None 6.1.15
been replaced
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-1
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 6-1
Summary of Remote Commands (continued)
COMMAND DESCRIPTION PARAMETER SECTION
LOCAL Enables the front panel buttons None 6.1.16
LOCKOUT Disables the front panel buttons None 6.1.17
LOPASS Disable/enable the 575L's
0-1 6.1.18
lowpass filter at A/D input
PRINT Prints a label None 6.1.19
RANGE Select range hold and set
1-7 6.1.20
amplifier to specified range
READ Returns power reading None 6.1.21
READ_LABEL Returns the indicated label format
1-7 6.1.22
file
RECAL Perform the optical calibration at
the specified wavelength,
wavelength register, and input
power (μW)
Wavelength
register (1-8)
Wavelength
value (600-1600)
6.1.23
Input Power
(0.50-150.00)
RESET Resets the 575L None 6.1.24
RESTORE Loads EEPROM with factory
None 6.1.25
default values
SAVE Make the present operating mode
None 6.1.26
the default
SET_DATE Set the 575L internal calendar
date (Day-Month-Year)
1-1-1993 to 3112-2100
6.1.27
SET_LABEL Select a printer label format 1-7 6.1.28
6-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 6-1
Summary of Remote Commands (continued)
COMMAND DESCRIPTION PARAMETER SECTION
SET_MODE Sets the default operating mode 0-3 6.1.29
SET_SN Set serial number 0-65535 6.1.30
SET_TIME Set the 575L internal clock time 00:00-23:59 6.1.31
VER Returns the software revision
None 6.1.32
level
WATT Select absolute linear units None 6.1.33
WAVE_REG Returns the currently selected
None 6.1.34
wavelength register
WLEN Returns wavelength of the
1-8 6.1.35
specified wavelength register
ZERO Zero the detector None 6.1.36
The 575L is supplied with an RS232 interface and an I
it possible to control one or more 575Ls from a single computer. This section
describes how to operate and control the 575L from a remote computer.
6.1 Remote Commands
The 575L can be controlled by remote over the RS232 interface. To communicate
with the 575L over the RS232 interface first select one of four BAUD Rates
(1200,2400,4800,9600). The BAUD Rate selection is covered in section 0. Then
connect the 575L to a computer with an RS232 cable. Make sure the computer is set
to the same BAUD Rate as the 575L. Command strings can be sent as either upper
or lower case.
6.1.1 THE "AUTO" REMOTE COMMAND
To enable amplifier autoranging send the string "auto".
2
C Bus interface. This makes
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-3
575L BENCH TOP POWER METER
6.1.2 THE "AW" REMOTE COMMAND
If the user wants to know what the AMPS/WATT value for a particular wavelength
is, the string "aw,n" is sent, where n corresponds to the wavelength register (1 <= n
<= 8). The 575L will then transmit back a value in the 3rd field of the 575L data
return string. The value will be a number 1-4095. The AMPS/WATT value is
calculated by dividing the return value by the constant 3358. Thus if a value of 3000
was returned by the 575L, the amps/watt would be 0.89 (ie 3000/3358).
6.1.3 THE "CAL" REMOTE COMMAND
To select an alternate calibration wavelength by remote the "cal" command is used.
There are 3 different ways of using the "cal" command. Sending the string "cal,+"
selects the next available calibration wavelength. Sending the string "cal,-" selects
the previously available calibration wavelength. To randomly select a calibration
wavelength send the string "cal,xxxx". For example if 1300nm is one of the
calibration wavelengths, then send the string "cal,1300" to select that wavelength.
RIFOCS CORP.
6.1.4 THE "CH" REMOTE COMMAND
This command is used when two or more 575Ls are connected together on the I
Bus. Refer to 1 for the following example.
Figure 6-1 Two 575Ls controlled by a
computer.
2
C
6-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
If the user wants to control 575L #2 with the computer, send the string "ch,2", now
all remote command will be sent to 575L #2.
6.1.5 THE "DB" REMOTE COMMAND
The 575L can be put into the dB mode by remote over the RS232 interface. This is
done by sending the string "db".
6.1.6 THE "DBM" REMOTE COMMAND
The 575L can be put into the dBm mode by remote over the RS232 interface. This is
done by sending the string "dbm".
6.1.7 THE "DEL_LAMDA" REMOTE COMMAND
To delete a calibration wavelength from the 575L send the string "del_lambda,n"
where 1 <= n <= 8. NOTE: the n represents one of the eight wavelength registers.
575L BENCH TOP POWER METER
6.1.8 THE "GET_DATE" REMOTE COMMAND
To get the date from the 575L send the string "get_date". The 575L will return the
date that is stored in its internal calendar. The date will be returned in the 3rd field of
the 575L data return string.
For example this is what the data return string would look like if the date was
October 12, 1993: "1,3,
12-10-1993
,7,0,850,0". See 6-3 and 6-4 for examples of the
data return string.
6.1.9 THE "GET_LBLNUM" REMOTE COMMAND
To get the currently selected label number send the "get_lblnum" string. The label
number will be returned in the 3rd field of the 575L data return string. For example
if the currently selected label number is 6 the data return string would look like this:
"1,3,6,7,0,850,0". See 6-3 and 6-4 for examples of the data return string.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-5
575L BENCH TOP POWER METER
6.1.10 THE "GET_LOPASS" REMOTE COMMAND
To get the state of the low pass filter (on or off) send the string "get_lopass". The
state of the low pass filter will be returned in the 3rd field of the 575L data return
string (0=off/1=on). For example if the low pass filter is on, the data return string
would look like this: 1,3,1,7,0,850,0. See 6-3 and 6-4 for examples of the data return
string.
6.1.11 THE "GET_MODE" REMOTE COMMAND
To get the default operating mode of the 575L send the string "get_mode". The
default operating mode will be returned in the 3rd field of the 575L data return
string. The value returned will 0-3 where
0 = WATT mode
1 = dBm mode
2 = WATT+HOLD mode
3 = dBm+HOLD mode
RIFOCS CORP.
For example if the default operating mode is dBm, the data return string would look
like this: "1,3,1,7,0,850,0". See 6-3 and 6-4 for examples of the data return string.
6.1.12 THE "GET_SN" REMOTE COMMAND
To get the label serial number, send the "get_sn" string. The label serial number will
be returned in the 3rd field of the 575L data return string. For example if the label
serial number = 10101, the data return string would look like this:
"1,3,
10101
,7,0,850,0". See 6-3 and 6-4 for examples of the data return string.
6.1.13 THE "GET_TIME" REMOTE COMMAND
To get the time from the 575L, send the "get_time" string. The time that is stored in
the 575L's internal clock will be returned in the 3rd field of the 575L data return
string. For example if the time = 14:55, the data return string would look like this:
"1,3,
,7,0,850,0". See 6-3 and 6-4 for examples of the data return string.
14:55
6-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
6.1.14 THE "HOLD" REMOTE COMMAND
To select the range hold function by remote send the string "hold". To exit this mode
send string "auto".
6.1.15 THE "INIT_CLOCK" REMOTE COMMAND
The 575L's internal clock/calendar circuit is powered by a rechargeable AA size
1.25V Nicad battery. Normally the user should never need to replace the battery,
however if it is replaced, it will be necessary to initialize the clock/calendar. This is
done by sending the string "init_clock".
6.1.16 THE "LOCAL" REMOTE COMMAND
To enable the 575L front panel buttons send the string "local".
575L BENCH TOP POWER METER
6.1.17 THE "LOCKOUT" REMOTE COMMAND
To disable the 575L front panel buttons send the string "lockout".
6.1.18 THE "LOPASS" REMOTE COMMAND
To turn on/off an internal low pass filter at the A/D input send the string "lopass,n".
If n=1 the low pass filter is turned on, if n=0 the low pass filter is turned off.
6.1.19 THE "PRINT" REMOTE COMMAND
To print a label send the string "print".
6.1.20 THE "RANGE" REMOTE COMMAND
To set the amplifier to one of its seven ranges of amplification send the string
"range,n" where 1 <= n <= 7. The auto ranging is disabled after the range command
is received.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-7
575L BENCH TOP POWER METER
6.1.21 THE "READ" REMOTE COMMAND
To get a power reading from a remote 575L send the string "read". The power
reading will be returned in the 3rd field of the 575L data return string. For example
this is what the data return string would look like if power = -10.00dBm: "1,3,
,7,0,850,0". See 6-3 and 6-4 for examples of the data return string.
10.00
6.1.22 THE "READ_LABEL" REMOTE COMMAND
To read the contents of a label format file, send the string "read_label,n" where n
corresponds to the label number (1 <= n <= 7).
6.1.23 THE "RECAL" REMOTE COMMAND
To recalibrate the 575L send the string "recal,x,yyyy,zzzz" where x = he wavelength
register that is being recalibrated (1 <= x <= 8), yyyy = the calibration wavelength
(600 <= yyyy <= 1600), and zzzz = the calibration power level measured in uW
(0.50 <= zzzz <= 150.0).
RIFOCS CORP.
-
6.1.24 THE "RESET" REMOTE COMMAND
To reset the 575L, send the string "reset". The 575L will be initialized to its default
operating mode.
6.1.25 THE "RESTORE" REMOTE COMMAND
Sending the string "restore" will load the 575L EEPROM with factory set default
values.
6.1.26 THE "SAVE" REMOTE COMMAND
To make the current operating parameters the default send the string "save".
6-8
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
6.1.27 THE "SET_DATE" REMOTE COMMAND
To set the date of the 575L's internal clock/calendar send the string
"set_date,dy,mn,year" where 1 <= dy <= 31 , 1 <= mn <= 12 and 1993 <= year <=
2100.
6.1.28 THE "SET_LABEL" REMOTE COMMAND
To select a label by remote send the string "set_label,n" where n corresponds to the
label number (1 <= n <= 7).
6.1.29 THE "SET_MODE" REMOTE COMMAND
To set the default operating mode of the 575L, send the string "set_mode,n" where 0
<= n <= 3. The value of n corresponds to the following modes:
0 = WATT mode
1 = dBm mode
2 = WATT+HOLD mode
3 = DBM+HOLD mode
575L BENCH TOP POWER METER
6.1.30 THE "SET_SN" REMOTE COMMAND
To set the label serial number by remote send the string "set_sn,nnnnn" where 0 <=
nnnnn <= 65535.
6.1.31 THE "SET_TIME" REMOTE COMMAND
To set the time of the 575L's internal clock/calendar send the string
"set_time,hr,min" where 0 <= hr <= 23 and 0 <= min <= 59.
6.1.32 THE "VER" REMOTE COMMAND
To get the software revision level from a remote 575L send the string "ver". The
revision will be returned in the 3rd field of the 575L data return string. For example
this is what the data return string would look like if the revision level is 1.02:
"1,3,
575L-V1.02
,7,0,850,0". See 6-3 and 6-4 for examples of the data return string.
6.1.33 THE "WATT" REMOTE COMMAND
The 575L can be put into the WATT mode by remote over the RS232 interface. This
is done by sending the string "WATT".
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-9
575L BENCH TOP POWER METER
6.1.34 THE "WAVE_REG" REMOTE COMMAND
To get the currently selected wavelength register send the string "wave_reg". The
value of the wavelength register (1-8) will be returned in the 3rd field of the 575L
data return string. For example if the currently selected wavelength register = 8, the
data return string would look like this: "1,1,8,7,0,850,0". See 6-3 and 6-4 for
examples of the data return string.
6.1.35 THE "WLEN" REMOTE COMMAND
If the user wants to know what wavelength is stored in a particular wavelength
register the string "wlen,n" is sent, where n corresponds to the wavelength register (1
<= n <= 8). The wavelength will be returned in the 3rd field of the 575L data return
string. For example this is what the data return string would look like if wavelength
= 1300: "1,3,
,7,0,850,0". See 6-3 and 6-4 for examples of the data return string.
1300
RIFOCS CORP.
6.1.36 THE "ZERO" REMOTE COMMAND
To zero the 575L's detector send the string "zero". If the detector is not completely
darkened an error will result.
6.2 Creating and Loading Label Format Files
The 575L has the capability of printing hard copies (labels) to a parallel or serial
printer. The user can store up to 7 different labels in the 575L's non-volatile memory
(EEPROM). This section describes how to create a label format, and how to down
load it to the 575L.
6-10
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
6.2.1 Creating a Label Format File
The label format file is created by using a text editor and by following certain rules.
The 1st character in the label format file
immediately by a number from 1-7. The number specifies which label the file will be
stored as, ie Label 1, Label 2, Label 3, Label 4, Label 5, Label 6, Label 7. The last
character in the file must always be the '~' (tilde) character, this is the label end of
file character. The file size must not exceed 256 characters.
The following example shows how to create a label format file.
--------------------------------------------------------
@1
.
. (label format data goes here)
.
~
--------------------------------------------------------
It is possible to print on a label the following parameters:
575L BENCH TOP POWER METER
always be the '@' character followed
must
1) Power
2) Wavelength
3) Time
4) Date
5) Serial number
6) Special ASCII characters
To print these parameters on a label refer to 6-2.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-11
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 6-2
Format Specifiers for Label Printing
Control Sequence Description
%P This will print the power reading. If the unit is in dB mode
then the dB reading is printed.
%R This will print the reference power if the unit is in the dB
mode. If the unit is not in the dB mode nothing will be
printed.
%W This will print the currently selected calibration wavelength.
%S This will print the serial number. The serial number will be
incremented each time it is printed. To set the serial number
from the front panel see Section 3.13.3. To set the serial
number by remote see Section 6.2.13.
%D This will print the date, (mmm-dd-yyyy).
%d This will print the date, (dd-mmm-yyyy). To set the date from
the front panel see Section 3.13.8 and 3.13.9. To set the date
by remote see Section 6.2.17.
%T This will print the time using the international format. To set
the time from the front panel see Section 3.13.10. To set the
time by remote see Section 6.2.16.
%t This will print the time using the standard format.
6-12
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 6-2
Format Specifiers for Label Printing (continued)
Control Sequence Description
/nnn This will print the ASCII code corresponding to the 3 digit
decimal number nnn. (Note: 3 digits must follow the '/'
character). If you want to print a '/' character, you must type it
in as "//".
EXAMPLE:
/218 will print
/179 will print
/192 will print
┌
│
└
// will print /
@ The '@' character must always be the 1st character in a label
format file. This lets the 575L know that the text following
the '@' is label format data.
~ The '~' character is used as the label format file End-Of-File
flag. The '~' character must always be the last character in the
label format file.
The following example shows a label format file.
--------------------------------------------------------
@1
RIFOCS Corporation
Power:
Wavelength:
Time:
%T
Date:
sn:
%P
%W
%D
%S
~
--------------------------------------------------------
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-13
575L BENCH TOP POWER METER
All characters are taken literally except for the Control Sequence Characters
in 2.
6.2.2 Down Loading a Label Format File
Once the file has been created it can be down loaded via the RS232 data link. Make
sure that the computer and the 575L are set up to communicate at the same BAUD
Rate. To set the BAUD Rate of the 575L see section 0.
The 575L RS232 interface is designed to communicate using 8 data bits, 1 stop bit,
no parity. 1 and 5 shows how the RS232 interface is wired.
The following example shows how a label format file would be down loaded to a
575L from an IBM compatible computer:
"c:\copy label.dat com1:"
RIFOCS CORP.
NOTE
where label.dat is the label format file that was created in section 0.
6.3 Data Format
Whenever a command is sent to the 575L a data return string will be sent back, with
the exception of the "read_label" command which sends back the contents of the
indicated label format file.
When the 575L sends the data return string to the host computer the data is in a
format as shown below.
2
"I
C addr., mode, return value, range, hold, wavelength, error/status"
6-14
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 6-3
575L Return String Data Format
PARAMETER VALUE
I2C Address 1-16 (This is the address of the unit that was read
from)
Mode (1-4)
1 = dBm mode
2 = dB mode
3 = WATT mode
4 = CAL mode (The CAL/RUN switch on the 575L
backpanel is in the CAL position)
Return Value ±n.nnnE-e (This format is returned for WATT
readings where e= 3,6,9)
±nn.nn (This format is returned for dBm/dB
readings)
Range (1-7)
1 = Amplifier range 1 (least sensitive)
2 = Amplifier range 2
3 = Amplifier range 3
4 = Amplifier range 4
5 = Amplifier range 5
6 = Amplifier range 6
7 = Amplifier range 7 (most sensitive)
Hold (0-1)
0 = Range Hold disabled
1 = Range Hold Enabled
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-15
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 6-3
Return String Data Format (continued)
PARAMETER VALUE
Currently selected
(600-1600nm)
wavelength
Error (0-23)
0 = No errors
1 = EEPROM error. This indicates that the EEPROM
2 = Zeroing error. Optical input port not completely
3 = ROM error. This indicates that the ROM chip has
4 = A relative REL+RATIO unit has stopped receiving
5 = More than one unit configured as a reference REF
6 = Calibration error. Too much light was present at the
7 = Calibration error. Not enough light was present at
8 = Calibration error. CAL/RUN switch is not in the
9 = EEPROM error. Some of the EEPROM memory
10 = dB command sent when the 575L was displaying
11 = Power level too high to measure.
12 = Power level too low to measure.
13 = Tried to change wavelengths while unit in dB
chip is bad. Contact factory for repair.
darkened.
lost some of its data. Contact factory for repair.
a signal from the reference REF unit.
unit while trying to take multi-channel dB ratio
measurements.
optical input during calibration.
the optical input during calibration.
CAL position.
was lost. The factory default EEPROM values will
be loaded into EEPROM.
HI or LO.
mode.
6-16
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 6-3
575L Return String Data Format (continued)
PARAMETER VALUE
Error 14 = Invalid wavelength sent with the "cal" command.
15 = An unrecognized command was received.
16 = Illegal number format received.
17 = A command parameter is outside of its accepted
range.
18 = Too few parameters were sent with a command.
19 = Too many parameter were sent with a command.
20 = The command string was not terminated correctly.
21 = Parameter string was too long.
22 = Improper character at string location.
23 = Device at indicated I
2
25 = Invalid I
C address.
2
C address not responding.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-17
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 6-4
575L Data Return String Examples
Return String Description
10,1,-50.06,6,0,850,0 This is the string returned after the
"READ" command was sent to the 575L.
2
I
C address = 10
Mode = 1 (dBm)
Power reading = -50.06
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
10,2,-00.04,6,0,850,0 This is the string returned after the
"READ" command was sent to the 575L.
2
I
C address = 10
Mode = 2 (dB)
Power reading = -00.04
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
10,3,+8.697E-09,6,0,850,0 This is the string returned after the
"READ" command was sent to the 575L.
2
I
C address = 10
Mode = 3 (WATT)
Power reading = +8.697E-09
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
6-18
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 6-4
575L Data Return String Examples (continued)
Return String Description
10,1,1300,6,0,850,0 This is the string returned after the
"WLEN,2" command was sent to the
575L.
2
I
C address = 10
Mode = 3 (WATT)
Wavelength returned = 1300 (nm)
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
10,3,575L-V1.00,6,0,1300,0 This is the string returned after the "VER"
command was sent to the 575L.
2
C address = 10
I
Mode = 3 (WATT)
Software revision = 575L-V1.00
Amplifier range = 6
Range hold = 0
Wavelength = 1300 (nm)
Error/status = 0
10,3,3024,6,0,1300,0 This is the string returned after the
"AW,2" command was sent to the 575L.
2
I
C address = 10
Mode = 3 (WATT)
AMPS/WATT value = 3024
Amplifier range = 6
Range hold = 0
Wavelength register = 1300 (nm)
Error/status = 0
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-19
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 6-4
575L Data Return String Examples (continued)
Return String Description
1,1,17:28,6,0,850,0 This is the string returned after the
"GET_TIME" command was sent to the
575L.
2
I
C address = 1
Mode = 1 (dBm)
time = 17:28 (International format)
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
1,1,12-10-1993,6,0,850,0 This is the string returned after the
"GET_DATE" command was sent to the
575L.
2
I
C address = 1
Mode = 1 (dBm)
Date = 12-10-1993 (Oct 12, 1993)
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
1,1,4,6,0,850,0 This is the string returned after the
"GET_LBLNUM" command was sent to
the 575L.
2
I
C address = 1
Mode = 1 (dBm)
Label number = 4
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
6-20
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 6-4
575L Data Return String Examples (continued)
Return String Description
1,1,1,6,0,850,0 This is the string returned after the
"GET_LOPASS" command was sent to
the 575L.
2
I
C address = 1
Mode = 1 (dBm)
Low pass = 1 (filter turned on)
Amplifier range = 6
Range hold = 0
Wavelength = 850 (nm)
Error/status = 0
1,1,0,6,0,1300,0 This is the string returned after the
"GET_MODE" command was sent to the
575L.
2
C address = 1
I
Mode = 1 (dBm)
Default mode = 0 (WATT)
Amplifier range = 6
Range hold = 0
Wavelength = 1300 (nm)
Error/status = 0
1,1,10101,6,1,1300,0 This is the string returned after the
"GET_SN" command was sent to the
575L.
2
I
C address = 1
Mode = 1 (dBm)
Label s/n = 10101
Amplifier range = 6
Range hold = 1
Wavelength = 1300 (nm)
Error/status = 0
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-21
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 6-4
575L Data Return String Examples (continued)
Return String Description
1,1,3,6,0,1300,0 This is the string returned after the
"WAVE_REG" command was sent to the
575L.
2
I
C address = 1
Mode = 1 (dBm)
Wavelength register = 3
Amplifier range = 6
Range hold = 0
Wavelength = 1300 (nm)
Error/status = 0
6.4 Using a Terminal Emulation Program with the 575L
The 575L can be controlled from a host computer with a terminal emulation
software package such as Procomm or Telix. The following instructions explain how
to control the 575L by remote with the Procomm software package.
1) Start the Procomm program on the host computer.
2) Verify that the communications parameters are set correctly. Press ALT+P to
view the currently selected communications parameters.
3) Put the host computer into the chat mode by pressing ALT+O. The host
computer screen will now be split into a local section and a remote section.
Remote commands can be sent to the 575L (from the local section of the host
computer screen) and return data string will appear in the remote section of
the host computer screen.
6-22
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
6.5 Programming Example in BASIC
'*************************************************************************
'
' Program Filename: 575DEMO1.BAS
'
' Purpose: This program gives user of the 575L a working example of how to control the '
575L from a computer using the BASIC programming language.
'
'
' Date: 7/8/93
'
' Compiler: Microsoft Quic kBasic
'
' Description of program operation:
' This program puts the 575L into the dBm mode and displays the data return string.
'
'*************************************************************************
'*********************** MAIN PROGRAM ************************************
CLS
OPEN "com1:9600,n,8,1" FOR RANDOM AS #1 ' Com1 is connected to the 575L
PRINT #1, "dbm" ' Send the dBm command to 575L
LINE INPUT #1, temp$ ' Get data return string back from 575L
LOCATE 20, 13, 1 ' Position cursor on computer screen
PRINT temp$ ' Display data return string
CLOSE #1
END ' End of program
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6-23
575L BENCH TOP POWER METER
RIFOCS CORP.
6-24
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
7 APPLICATIONS
This section illustrates the different applications of the 575L Fiber Optic Power
Meter for measurement of sources, emitters, photoreceivers, fiber cable
transmission, connector and splice loss.
7.1 Optical Power Measurement
The output power of an optical source is measured by simply coupling the output end
of a fiber to the input of the power meter as shown in 2. Be sure you have the correct
Snap-On fiber optic adapter on the optical input of the power meter. Be sure you
know the source wavelength and are using a power meter calibrated for the same
wavelength.
7.2 End-To-End Loss Measurement
There is no single value of attenuation for a fiber; there is simply an attenuation
value associated with a specific measurement method. All measurement methods
recreate certain conditions, especially launch conditions into multimode fibers. Also
wavelength and spectral width are important. Repeated measurements on the same
fiber with the same measurement method will produce the same value. Users of fiber
should recognize that not all attenuation measurement techniques are equivalent.
When attempting to correlate in-house measurements with those of the fiber
manufacturer, it is necessary to test with the same attenuation method that was used
by the fiber manufacturer.
575L BENCH TOP POWER METER
A few more conditions must be correct before proper measurements can be made.
Because of differential mode attenuation, the loss measured in multimode fibers
depends on how the optical power is distributed among modes in the fiber. Under
some launch conditions "leaky" (radiative) modes may be excited. This means that
light launched into a fiber at steep angles is attenuated more than light which is
launched into a fiber at shallow angles. To reduce the variation among loss
measurements, efforts should be made to excite a mode distribution at the input end
of the fiber which simulates the condition under actual use. The effect of modal
distribution in an attenuation measurement should not be underestimated.
The Electronic Industries Association (EIA) has developed Fiber Optic Test
Procedures (FOTP) for the standardization of these measurements. Method B is the
most used procedure of FOTP-171. It is used for testing cable assemblies with the
same connectors on each end. This method is used to screen out any cable assembly
which has a higher loss from other cable assemblies. This test procedure is illustrated
in 7-2 and 7-3.
The following 5 steps outline the procedure for performing end-to-end loss
measurements:
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
7-1
575L BENCH TOP POWER METER
1.) Connect an LED Source to your launch cable with an EMS (Equilibrium
Mode Simulator) performed on this cable. The LED source must overfill the
launch cable both spatially and angularly. Connect the other end of your
launch cable to your reference cable via an inline adapter. The other end of
your cable connects to the RCVR optical port of the 575L power meter via
the proper Snap-On series fiber optic adapter. Measure and record the optical
power in dBm exhibited at the end of your reference cable. This is your initial
power level (P
). See 7-2.
o
RIFOCS CORP.
Figure 7-1 EMS Apparatus (Mandrel Wrap).
7-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
7-3
575L BENCH TOP POWER METER
An EMS is an apparatus, such as a Mandrel Wrap, or suitable optics capable
of simulating within a short fiber the equilibrium mode distribution exiting a
long fiber under steady state conditions. Example: Five wraps of 50/125
graded index fiber on a 20mm (0.788-inch) diameter rod simulates the far
field output radiation pattern of a fiber one kilometer in length. Consult
FOTP-50 for further information.
2.) The cable assembly to be tested is inserted between the reference launch
cable and reference receive cable
RIFOCS CORP.
Note:
3.) Measure and record the power (P
) in dBm exhibited on the power meter in
1
the test data.
4.) Now reverse the test cable. Measure and record a reading as previously
described. This will ensure that any reversibility is accounted for in the
measurement.
5.) The loss of this cable assembly is:
(dB) L = dBm (P
) - dBm (P
o
avg
)
Note:
In practice the dB function could be used to perform this test. For example in
step 1 instead of measuring and recording the optical power in dBm, just
press the dB button. The optical power will be displayed in dBm by the small
digits of the 575L LCD. The big digits of the 575L LCD will display 0.00dB.
In step 3 the loss of the test cable will be displayed (in dB) by the big digits of
the 575L LCD.
7-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
Figure 7-2 Initial Reference Power Level.
575L BENCH TOP POWER METER
Figure 7-3 Test Cable Power Level.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
7-5
575L BENCH TOP POWER METER
7.4 Connector and Component Loss Measurement
The theory of measuring loss in a connector or splice is quite simple: Measure (in
dBm) the power into the connector or splice and the power out of the connector or
splice. The difference (in dB) is the connector or splice loss. In practice, the
measurement technique can strongly influence the results, as discussed earlier. Two
major variables are mode distribution and wavelength.
Method B is the most used procedure of FOTP-34 (see 7-4). This method is intended
to determine the interconnecting device loss when installed in a long length optical
link (steady state modal conditions). The "long launch" conditions are simulated by
conditioning the output of the source with an Equilibrium Mode Simulator (EMS).
The measurement is made by measuring the power (P
side of the connector or splice, then measuring the optical power (P
the interconnect device is inserted. The loss of the connecting device is:
RIFOCS CORP.
, in dBm) out of the source
o
, in dBm) after
1
(dB) Loss = dBm (P
) - dBm (P1)
o
7-6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Figure 7-4 Block Diagram of Component Insertion Loss Measurement.
7.5 References
The user may obtain a complete index of the available Fiber Optic Test Procedures
(FOTP) by requesting Component Bulletin No. 9-E - Reference Guide for Fiber
Optic Test Procedures by writing to the following address:
Electronic Industries Association
2001 Eye Street, N.W.
Washington, D.C.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
7-7
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
8 THEORY OF OPERATION
This section contains an overall functional description of the 575L Power Meter.
8.1 Functional Description
Basically, the 575L is a microprocessor-based picoammeter with a high
performance, low noise, solid state InGaAs (Indium Gallium Arsenide) photodiode
on its front end. The basic components of the instrument are shown in 1.
575L BENCH TOP POWER METER
Figure 8-1 Basic Components of the 575L.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
8-1
575L BENCH TOP POWER METER
8.2 Optical Detector
Essentially the optical detector is a transducer used to collect and convert optical
irradiance into an electrical signal (current). The term responsivity (R) is used to
describe the sensitivity of the detector, and is the ratio of the ouput current to the
input power. Responsivity is generally stated in terms of AMPS/WATT at a given
wavelength.
The detector can be calibrated over the range 600nm to 1600nm. The sensitivity
typically peaks at about 1500nm, with approximately 0.9μA per 1μW.
In simple terms, the internal CPU reads the photocurrent generated by the detector
via the analog to digital converter (A/D), and divides it by the responsivity data for
that particular wavelength. The result is the absolute optical power as shown in the
equation below:
Power (WATTS) = I/R
RIFOCS CORP.
where I = photocurrent, in AMPS.
R = responsivity, in AMPS/WATT.
The 575L electronics are divided among two circuit boards - CPU and Display.
This section briefly describes the basic operation of each electronic block.
8.3 CPU Board
The CPU board centers around a derivative of the 8051 microcontroller.
Memory
Memory is composed of ROM (program memory), RAM (program data memory)
and EEPROM (for calibration data and system parameter storage).
Amplifier
The amplifier is a transimpedence amplifier used to convert detector current to
voltage. The amplifier has seven decades of gain. The output of this amplifier is
passed to the A/D circuit. The A/D converts the signal to a digital value which can
be read by the microcontroller.
Analog Output
The output of the amplifier is also sent to the analog output BNC connector located
on the rear panel of the 575L. This analog output voltage is calibrated to the actual
power being displayed by the power meter. The voltage level at the analog output
BNC connector is determined by the optical input power, and by the present range of
amplification.
8-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
575L BENCH TOP POWER METER
Table 8-1
Amplifier Range 575L Display
Relationship of the power reading to the analog output voltage.
Analog Output
(in WATT mode)
1
2
3
4
5
900.0μW to 2.000mW
90.00μW to 1.500mW
9.000μW to 150.0μW
900.0nW to 15.00μW
90.00nW to 1.500μW
0.09V to 0.20V
0.09V to 1.50V
0.09V to 1.50V
0.09V to 1.50V
0.09V to 1.50V
6 9.000nW to 150.0nW 0.09V to 1.50V
7 0.900nW to 15.00nW 0.09V to 1.50V
RS232 Interface
The RS232 interface makes it possible to control the 575L from a computer. The
interface meets all RS232C and V.28 specifications. Refer to 5 and 1 for the wiring
of the RS232 interface.
Inter-Integrated (I
2
The I
C Bus interface consists of a serial data (SDA) line and a serial clock (SCL)
2
C) Circuit Bus
line which carry information between devices connected to the bus, and a ground
line which connects the grounds between devices connected to the bus. Basically this
interface makes it possible to connect multiple 575Ls together. Refer to 6 for the
wiring of the I
2
C interface.
Parallel Printer Interface
With the parallel printer interface it is possible to print data to a parallel printer.
Refer to 8 and 3 for the wiring of the printer interface.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
8-3
575L BENCH TOP POWER METER
Power Supply Circuit
All power supply requirements are furnished via the linear power supply circuit. This
circuit provides regulated ±5VDC. The power supply circuit has an input voltage
range of 100-250 VAC, 50-60 Hz.
8.4 Display Board
The custom LCD (liquid crystal display), associated display driver, and the push
buttons make up the major components of the Display Board. In operation the
microcontroller outputs data to the board which is processed by the display driver
and drives the tri-plexed LCD. When a user presses a button on the front panel that
information is sent from the Display Board to the microcontroller.
RIFOCS CORP.
8-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
9 ACCESSORIES
The 575L is shipped from the factory with an instrument manual, a Snap-On (SOC)
series adapter, an optical metrology report, the AC line cord and spare fuses. The AC
line cord supplied with the 575L is the 3-prong US=type (specify if a different
configuration is required for over seas).
9.1 Fiber Optic Adapters
The fiber optic adapters listed in this section snap on to the optical input port. 2
shows an adapter being connected to the 575L's optical input port. It is important to
note that the adapter and the optical port are keyed, so it is necessary to line them up
before pressing the adapter onto the optical port. A substantial amount of force is
required to remove the adapter from the optical port. When removing the SOC
adapter it is necessary to firmly hold the instrument with one hand while pulling the
adapter off with the other hand.
575L BENCH TOP POWER METER
Table 9-1
RIFOCS SOC Model
RIFOCS Snap-On (SOC) series adapters
Description
1001 BLANK ADAPTER
1010 DIN 47256
1020 FC-PC
1030 ST
1040 DIAMOND HMS-10/HP
1050 DIAMOND HMS-0 (3.5mm)
1060 SC
1081 VFO
1082 BICONIC
1086 DIAMOND HMS-10/A
(2.5mm SMA)
1087 SMA 905/906
1089 D4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
9-1
575L BENCH TOP POWER METER
9.2 Rack Mount Adapter
The rack mount adapter can hold two bench top instruments side by side in a 19 inch
wide rack system.
9.3 Interface Cables
RIFOCS CORP.
There are two different RS232 cables which are available for the 575L from
RIFOCS as well as an I
2
C Bus interface cable. Refer to table 9-2 for the RIFOCS
part number and description of the cables.
Table 9-2
P/N
RIFOCS Interface Cables
Description
Cable Wiring
931 D25 female to D25 female, 3m
932 D25 female to D9 female, 3m
933 Multimeter bus (I2C interface cable), 3m Refer to Table 5-5
935 D25 male to D25 female, 3m Refer to Table 5-2
936 D25 male to D9 female, 3m Refer to Figure 5-2
2
The I
C Bus interface cable looks like a telephone jack cable, however it is
not compatible with the wiring of the standard modular telephone jack cable.
9-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Note:
RIFOCS CORP
10 PERFORMANCE VERIFICATION
This section contains the information necessary to verify that the 575L is performing
within the published specifications. Ideally performance verification should be
performed when the instrument is first received to ensure that no damage or change
in calibration has occurred during shipment. The verification procedure may also be
performed whenever instrument accuracy is suspect or following calibration. If
performance for any calibrated wavelength is outside of the specified limits, recalibration can be performed as described in section 0.
NOTE
If the instrument does not meet the specifications and is still
under warranty (less than 12 months since the data of
shipment), contact RIFOCS Corporation to determine the
action to be taken.
10.1 Environmental Conditions
575L BENCH TOP POWER METER
All measurements should be made at an ambient temperature between 18°C and
25°C (65° to 77°F) with a relative humidity of less than approximately 70%.
10.2 Recommended Test Equipment
The procedures described in this section are for verifying the performance of the
575L at 1300nm. The recommended equipment list is given in 1. For verifying the
calibration at other wavelengths, you will have to substitute other laser sources with
the proper central or peak wavelength.
The test set-up requires a stable source at the wavelength to be calibrated, a precision
optical attenuator, and reference standard such as a calibrated radiometer or
photodiode. The source must be a highly stable laser source with at least ±5nm
accuracy. A precision optical attenuator is required to verify linearity of the 575L.
The reference standard should be one provided by your country's National Standards
Laboratory (such as U.S. National Institute of Standards and Technology) or a
commercial calibration lab providing similar services.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
10-1
575L BENCH TOP POWER METER
RIFOCS CORP.
Table 10-1
Recommended Test Equipment
EQUIPMENT SPECIFICATIONS
N.I.S.T.
Secondary Transfer Standard for Optical
Accuracy: ±2% at 1550nm, 1300nm,
850nm, 780nm
Fiber Power (STSOFPM) Measurements
RIFOCS Model 666R Laser Source or
equivalent
Single-mode laser source, laser pigtailed
using SMF-28 fiber
Peak wavelength: 1550nm
RIFOCS Model 665R Laser Source or
equivalent
Single-mode laser source, laser pigtailed
using SMF-28 fiber
Peak wavelength: 1300nm
RIFOCS Model 667R Laser Source or
equivalent
Multi-mode laser source, laser pigtailed
using SMF-28 fiber
Peak wavelength: 850nm
RIFOCS Model 664R Laser Source or
equivalent
Multi-mode laser source, laser pigtailed
using SMF-28 fiber
Peak wavelength: 780nm
Photodyne Model 1975XQ-010J SM
Optical Attenuator or equivalent
Single-mode optical attenuator with FCPC connectors on the optical ports
Accuracy: Greater of ±0.20dB or ±2%
Max.
Insertion loss: Less than 5dB
RIFOCS single-mode fiber optic cable
assembly P/N 2020-101-05 (Qty. 2)
Single-mode cable assembly terminated
with FC-PC connectors on both ends
Core/Cladding dia: 9/125μm
Computer with an RS232 interface, and a
serial communications package installed.
The computer must have a serial port
which conforms to the RS232-C standard.
RIFOCS Snap-On Fiber Optic Adapter FC-PC adapter for the 575L
10-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
RIFOCS CORP
10.3 Initial Conditions
If the instrument has been subject to temperatures below 18°C (65°F) or above 25°C
(77°F), allow sufficient time for the instrument to reach temperatures within this
range. Generally, it takes one hour to stabilize an instrument that is 10°C (18°F)
outside of this range.
10.4 Equipment Set-Up
1 shows how the appropriate equipment should be hooked together. Connect the
output of the Model 665 Laser Source to the input of the attenuator using one of the
single mode patch cables. Connect one end of the second patch cable to the output of
the attenuator. The uncoupled end should be initially connected to the Transfer
Standard.
D.U.T. = Device Under Test.
575L BENCH TOP POWER METER
Figure 10-1 Diagram of equipment set-up for calibration.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
10-3
Loading...