Newport FPM-8220 User manual

User’s Guide
Fiber Optic Power Meter
FPM-8220
70044001 April 2018

April 2018 i FPM-8220
Table of Contents
Safety Information and the Manual.................................................................................. v
General Safety Considerations........................................................................................ v
Safety Symbols .............................................................................................................. vi
Safety Marking Symbols.................................................................................................vii
Warranty.........................................................................................................................vii
Limitations.......................................................................................................................................vii
Returning an Instrument ................................................................................................viii
Claims for Shipping Damage ......................................................................................................... viii
Comments, Suggestions, and Problems ........................................................................ ix
Chapter 1: Introduction and Specifications .............................................1
Safety Considerations ..................................................................................................... 1
Product Overview ............................................................................................................ 1
Options and Accessories................................................................................................. 3
Specifications .................................................................................................................. 4
Chapter 2: General Operation ..................................................................5
Installation ....................................................................................................................... 5
Grounding Requirements................................................................................................................. 5
AC Line Power Requirements ......................................................................................................... 5
Power up Sequence......................................................................................................................... 5
Firmware Upgradeability.................................................................................................................. 6
GPIB Communication ...................................................................................................................... 6
USB Communication........................................................................................................................ 6
Connecting a Measurement Head ................................................................................................... 6
Tilt Foot Adjustment ......................................................................................................................... 6
Rack Mounting ................................................................................................................................. 6

April 2018 ii FPM-8220
Front Panel Operation ..................................................................................................... 7
Power On / Off ................................................................................................................................. 7
Setup................................................................................................................................................ 7
Mode ................................................................................................................................................ 8
Display ........................................................................................................................................... 10
Error Codes.................................................................................................................................... 11
The FPM-8220 Fiber Optic Measurement Heads.......................................................... 12
Protecting the FMH-8705 Fiber Optic Measurement Head ........................................................... 12
Protecting the FMH-8715 and FMH-87107 Fiber Optic Measurement Heads .............................. 13
Measurements through a Connector ............................................................................................. 13
Measurements through Bare Fiber ................................................................................................ 14
Measuring Higher Power ............................................................................................................... 17
Understanding the Calibration Certificate ...................................................................... 17
Photodetector Responsivity ........................................................................................................... 17
Analog Output (BNC)..................................................................................................... 18
Gain Range Boundaries................................................................................................................. 19
Determining Range ........................................................................................................................ 19
Relating Optical Power to Analog Voltage..................................................................................... 19
General Operation......................................................................................................... 21
Warm-up and Environmental Considerations................................................................................ 21
Summary of Operating Procedures ............................................................................................... 21
Chapter 3: Remote Operation.................................................................23
Remote Operation Features .......................................................................................................... 23
Basic GPIB Concepts .................................................................................................... 24
Data and Interface Messages........................................................................................................ 24
Talkers, Listeners, and Controllers ................................................................................................ 24
GPIB Cable Connections ............................................................................................................... 24
The GPIB Connector ..................................................................................................... 25
Configuring the GPIB Controller .................................................................................... 27
Changing Operation from Local to Remote ................................................................................... 27
Setting the GPIB Address.............................................................................................................. 27
Basic USB concepts ...................................................................................................... 27
GPIB vs. USB Communication ...................................................................................................... 28

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Command Syntax .......................................................................................................... 29
Letters ............................................................................................................................................ 29
White Space................................................................................................................................... 29
Terminators.................................................................................................................................... 30
Command Separators.................................................................................................................... 30
Parameters .................................................................................................................................... 30
Command Tree Structure .............................................................................................. 32
Syntax Summary............................................................................................................................ 32
IEEE 488.2 Common Commands.................................................................................................. 34
Status Reporting............................................................................................................ 36
Event and Condition Registers ...................................................................................................... 36
Command Timing........................................................................................................................... 38
Sequential / Overlapped Commands............................................................................................. 38
Query Response Timing ................................................................................................................ 38
Chapter 4: Command Reference.............................................................39
Remote Command Reference Summary....................................................................... 39
Command Reference .................................................................................................... 42
Chapter 5: Troubleshooting ...................................................................67
Troubleshooting Guide .................................................................................................. 68
Optical Measurement Problems .................................................................................................... 71
Error Messages ............................................................................................................. 72
Error Code Tables.......................................................................................................................... 72


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April 2018 v FPM-8220
Safety and Warranty Information
Details about cautionary symbols
Safety markings used on the instrument
Information about the warranty
Customer service contact information
Safety Information and the Manual
Throughout this manual, you will see the words Caution and Warning indicating potentially
dangerous or hazardous situations which, if not avoided, could result in death, serious or minor injury,
or damage to the product. Specifically:
Caution indicates a potentially hazardous situation which can result in minor or moderate injury or
damage to the product or equipment.
Warning indicates a potentially dangerous situation which can result in serious injury or death.
Visible and/or invisible laser radiation. Avoid direct exposure to the beam.
General Safety Considerations
If any of the following conditions exist, or are even suspected, do not use the instrument until safe
operation can be verified by trained service personnel:
Visible damage
Severe transport stress
Prolonged storage under adverse conditions
Failure to perform intended measurements or functions
If necessary, return the instrument to ILX Lightwave, or authorized local ILX Lightwave distributor, for
service or repair to ensure that safety features are maintained.

April 2018 vi FPM-8220
All instruments returned to ILX Lightwave are required to have a Return Authorization Number
assigned by an official representative of ILX Lightwave Corporation. See Returning an Instrument for
more information.
Safety Symbols
This section describes the safety symbols and classifications.
Technical specifications including electrical ratings and weight are included within the manual. See
the Table of Contents to locate the specifications and other product information. The following
classifications are standard across all ILX Lightwave products:
Indoor use only
Ordinary Protection: This product is NOT protected against the harmful ingress of
moisture.
Class I Equipment (grounded type)
Mains supply voltage fluctuations are not to exceed ±10% of the nominal supply voltage.
Pollution Degree II
Installation (overvoltage) Category II for transient overvoltages
Maximum Relative Humidity: <80% RH, non-condensing
Operating temperature range of 0 °C to 40 °C
Storage and transportation temperature of –40 °C to 70 °C
Maximum altitude: 3000 m (9843 ft.)
This equipment is suitable for continuous operation.

April 2018 vii FPM-8220
Safety Marking Symbols
This section provides a description of the safety marking symbols that appear on the instrument.
These symbols provide information about potentially dangerous situations which can result in death,
injury, or damage to the instrument and other components.
Caution, refer
to manual
Earth ground
Terminal Alternating current
Visible and/or
invisible laser
radiation
Caution, risk of
electric shock
Protective
Conductor
Terminal
Caution,
hot surface
Frame or chassis
terminal
On: in position of bistable push control.
The slash (|) only denotes that mains are on
Off: Out position of a bistable push control.
The circle (O) only denotes that mains are off.
Warranty
ILX LIGHTWAVE CORPORATION warrants this instrument to be free from defects in material and
workmanship for a period of one year from date of shipment. During the warranty period, ILX will
repair or replace the unit, at our option, without charge.
Limitations
This warranty does not apply to fuses, lamps, defects caused by abuse, modifications, or to use of
the product for which it was not intended.
This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of
merchantability or fitness for any particular purpose. ILX Lightwave Corporation shall not be liable for
any incidental, special, or consequential damages.
If a problem occurs, please contact ILX Lightwave Corporation with the instrument's serial number,
and thoroughly describe the nature of the problem.

April 2018 viii FPM-8220
Returning an Instrument
If an instrument is to be shipped to ILX Lightwave for repair or service, be sure to:
Obtain a Return Authorization number (RA) from ILX Customer Service.
Attach a tag to the instrument identifying the owner and indicating the required service or
repair. Include the instrument serial number from the rear panel of the instrument.
Attach the anti-static protective caps that were shipped with the instrument and place the
instrument in a protective anti-static bag.
Place the instrument in the original packing container with at least 3 inches (7.5 cm) of
compressible packaging material. Shipping damage is not covered by this warranty.
Secure the packing box with fiber reinforced strapping tape or metal bands.
Send the instrument, transportation pre-paid, to ILX Lightwave. Clearly write the return
authorization number on the outside of the box and on the shipping paperwork. ILX
Lightwave recommends you insure the shipment.
If the original shipping container is not available, place your instrument in a container with at
least 3 inches (7.5 cm) of compressible packaging material on all sides.
Repairs are made and the instrument returned transportation pre-paid. Repairs are warranted for the
remainder of the original warranty or for 90 days, whichever is greater.
Claims for Shipping Damage
When you receive the instrument, inspect it immediately for any damage or shortages on the packing
list. If the instrument is damaged, file a claim with the carrier. The factory will supply you with a
quotation for estimated costs of repair. You must negotiate and settle with the carrier for the amount
of damage.

April 2018 ix FPM-8220
Comments, Suggestions, and Problems
To ensure that you get the most out of your ILX Lightwave product, we ask that you direct any
product operation or service related questions or comments to ILX Lightwave Customer Support. You
may contact us in whatever way is most convenient:
Phone [phone] or [phone]
Fax [phone]
On the web at: ilx.custhelp.com
Or mail to:
ILX Lightwave Corporation
P. O. Box 6310
Bozeman, Montana, U.S.A 59771
www.ilxlightwave.com
When you contact us, please have the following information:
Model Number
Serial Number
End-user Name
Company
Phone
Fax
Description of what is connected to the ILX Lightwave instrument
Description of the problem
If ILX Lightwave determines that a return to the factory is necessary, you are issued a Return
Authorization (RA) number. Please mark this number on the outside of the shipping box.
You or your shipping service are responsible for any shipping damage when returning the instrument
to ILX Lightwave; ILX recommends you insure the shipment. If the original shipping container is not
available, place your instrument in a container with at least 3 inches (7.5 cm) of compressible
packaging material on all sides.
We look forward to serving you even better in the future!

April 2018 x FPM-8220
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April 2018 1 FPM-8220
Chapter 1:
Introduction and Specifications
This chapter is an introduction to the FPM-8220 Fiber Optic Power Meter and the FMH-8705,
FMH-8715 and FMH-87107 Fiber Optic Measurement Heads. This chapter also includes:
Safety considerations and instructions
Product Overview
Options and accessories
Specifications
Safety Considerations
If any of the following symptoms exist, or are even suspected, remove the FPM-8220 from
service. Do not use the FPM-8220 until trained service personnel can verify safe
operation.
Visible damage
Severe transport stress
Prolonged storage under adverse conditions
Failure to perform intended measurements or functions
If necessary, return the FPM-8220 to ILX Lightwave for service and repair to ensure that
safety features are maintained.
Product Overview
The FPM-8220 is a precise and reliable tool for fiber optic power measurement. The FPM-8220
is compatible with the FMH-8705, FMH-8715, and FMH-87107 fiber optic measurement heads.
The FMH-8705 accommodates wavelengths from 800 to 1650 nm and accurately measures
power over a 86.5 dB dynamic range from +1.5 dBm to -85 dBm. Both the FMH-8715 and the
FMH-87107 accommodate wavelengths from 800 to 1650 nm. The FMH-8715 accurately
measures power over a 90 dB dynamic range, from +20 dBm to -70 dBm, while the FMH-87107
measures over a range of 90 dB, from +30 dBm to -60 dBm. NIST-traceable calibration assures
consistent results. Other features include:
Each reading is the average of up to 45 measurements to provide high accuracy even with
unstable inputs
Store and recall up to ten instrument settings

April 2018 2 FPM-8220
Relative power can be displayed by a bar graph on the front panel for visual confirmation of
the peaking of optical power in alignment applications
0 to 10 V analog output for fine resolution relative power monitoring
A sophisticated USB and GPIB/IEEE 488.2 interface
The fiber optic measurement head includes a two meter cable for convenient positioning near
the device under test
A heavy, robust design for production test workstations
Customer upgradeable firmware via USB
Figure 1.1 – FPM-8220 Front Panel
Figure 1.2 – FPM-8220 Rear Panel

April 2018 3 FPM-8220
Options and Accessories
Options and accessories available for the FPM-8220 Fiber Optic Power Meter and the FMH-8700
series Fiber Optic Measurement Heads include the following:
Description Model / Part Number
FC Adapter CA -100
SC Adapter CA -150
LC Adapter CA - 200
Bare Ferrule Adapter CA - 250
Bare Fiber Adapter Ring CA - 120
Bare Fiber Holder (requires CA-120) BF - 820
Rack Mount Kit, single instrument RM - 144
Rack Mount Kit, dual instrument RM - 145
Rack Mount Kit, FMH Measurement Heads RM - 143
The CA-120 bare fiber adapter ring accepts ILX Lightwave BF-820 or Agilent 81000BA bare
fiber holders. This compatibility also means you can use the BF-820 bare fiber holder with
Agilent or HP power meters.

April 2018 4 FPM-8220
Specifications

April 2018 5 FPM-8220
Chapter 2:
General Operation
This chapter describes how to set up and operate the FPM-8220 Fiber Optic Power Meter using
the front panel controls.
Installation
Introduction to the FPM-8220 front panel
FMH-8700 series fiber optic measurement head familiarization
Analog Output
General operating procedures
Installation
Grounding Requirements
The FPM-8220 Fiber Optic Power Meter comes with a three conductor AC power cable. The power
cable must be plugged into an approved three-contact electrical outlet or used with a three-contact to
two-contact adaptor with the grounding wire connected to an electrical ground (safety ground). ILX
Lightwave recommends connecting the instrument only to properly earth grounded receptacles. The
power cord connector and power cable meet IEC safety standards.
To avoid electrical shock hazard, connect the instrument to a properly earth grounded, three
prong receptacle only. Failure to observe this precaution can result in severe injury or death.
AC Line Power Requirements
The FPM-8220 is factory configured for operation at nominal line voltages of 100, 120, 220, or
240 VAC. Make sure the voltage requirements that are printed on the back panel of the
instrument matches the power-line voltage in your area. Contact ILX Lightwave Customer
Service if you need to reconfigure the input voltage range.
Power up Sequence
With the FPM-8220 connected to an AC power source, pressing POWER ( ) supplies AC line
power to the instrument and starts the following power-up sequence:
All front panel indicators ON, all 7-segment displays indicate "8"
All front panel indicators OFF
Display shows serial number and firmware version of the meter

April 2018 6 FPM-8220
If a measurement head is connected, the display shows the measurement head’s serial
number and calibration date. If the measurement head is not connected, the display shows
“No Head Connected.”
Each display lasts 2-3 seconds.
During the front panel indicator test, the FPM-8220 performs a self-test to ensure that internal
hardware and software are communicating. If the FPM-8220 cannot successfully complete the
test, an error message is displayed. See Appendix A for a complete list of error messages.
After the self test, FPM-8220 configuration is set to the same state as when power was last
turned off.
If you wish, you can use the recall function to quickly get to a different configuration. See Store
and Recall for more information.
Firmware Upgradeability
The firmware on the FPM-8220 can be reinstalled or upgraded via USB 2.0 by contacting the ILX
Lightwave team at [e-mail].
GPIB Communication
The IEEE 488.2 GPIB interface connector is located on the rear panel, directly above the power input
(See Figure 1.2 on page 2). The 24-pin connector is tapered to ensure proper orientation of the GPIB
cable. Use fingers to tighten the two screws on the cable connector.
A total of 15 devices can be connected together on the same GPIB interface bus. The cables have
double-sided male/female connectors on each end so that several cables can be stacked. This
allows more than one cable to be attached to any one device. However, the maximum length of the
GPIB interface bus must not exceed 20 meters (65 feet), or 3 meters (10 feet) per device.
USB Communication
The USB connector is located on the back rear panel, next to the GPIB connector. This USB
connector is the square "B"-style connector. A standard USB A/B cable is required to communicate
with the instrument. To communicate to the instrument using USB, install the USB Driver found on
the accompanying CD or on the website prior to connecting the unit to the PC. Please refer to
Chapter 3 for more detailed instructions on operating the instrument through USB.
Connecting a Measurement Head
All optical measurement heads interface with the instrument via the 26 pin high density 'D' connector
located on the lower left side of the rear panel.
Tilt Foot Adjustment
The FPM-8220 has front legs that extend to make it easier to view the displays. To use them, rotate
the legs downward until they lock into position.
Rack Mounting
The FPM-8220 conforms to international standards for a 2U height ½ width rack mounting. Available
rack mount accessory kits contain detailed mounting instructions.

April 2018 7 FPM-8220
Front Panel Operation
This section describes the fundamentals of front panel operation for the FPM-8220 Fiber Optic
Power Meter. Both of the labeled areas on the front panel, SETUP and MODE, and the display
are described below.
Figure 2.1 – Front Panel Display
Power On / Off
The POWER ( ) button applies power to the FPM-8220 and starts the power-up sequence
described in Chapter 1.
Setup
Up Arrow The UP ARROW ( ) is used to increase values for gain adjustment,
wavelength, display filter, store and recall bins, GPIB address, and the user
calibration factor. In auto gain range operation mode, the arrow key can be
used to put the instrument into manual gain range mode.
Down Arrow The DOWN ARROW () is used to decrease values for gain
adjustment, wavelength, display filter, store and recall bins, GPIB address,
and the user calibration factor. In auto gain range operation mode, the
arrow key can be used to put the instrument into manual gain range mode.
Enter Pressing the ENTER pushbutton stores a new value of the parameter that
is currently being adjusted.
Recall Pressing RECALL allows the user to recall a stored instrument setup from
recall bins numbered 0 to 10. Savable settings include gain range,
wavelength, display mode, filter mode, and the user calibration offset value.
To select a stored setup, first press the RECALL pushbutton then use the
UP ARROW and the DOWN ARROW to select the appropriate recall bin
and press ENTER to select the stored bin.
Bin 0 Factory default instrument configuration
Bin Headinfo Measurement Head information including model number, serial number,
and last calibration date.

April 2018 8 FPM-8220
Store Pressing STORE allows the user to save an instrument setup, including
gain range, wavelength, display mode, filter mode, and user calibration
offset value, in bins numbered 1-10. To save a setup, first press the
STORE pushbutton, then use the UP ARROW and the DOWN ARROW to
select the appropriate store bin and press ENTER.
Wavelength By pressing WAVELENGTH (λ)and using the UP ARROW and the DOWN
ARROW, the user can adjust the wavelength to that of the input light for
accurate power measurements. The wavelength adjustment range is
dependent upon the FMH-8700 series Fiber Optic Measurement Head
connected to the FPM-8220.
Local When the instrument is in remote operation mode, pressing the RECALL
pushbutton will put the instrument back to local (front panel) control mode.
Remote Upon receipt of a command through either the USB or GPIB interface bus,
the instrument automatically enters remote mode; indicated by RMT in the
upper right corner of the display. During remote communication, the front
panel will be locked. Pressing the RECALL pushbutton will unlock the
front panel.
GPIB Address Pressing RECALL and the UP ARROW pushbuttons simultaneously will
put the instrument in the GPIB address adjust mode. The currently stored
GPIB address will appear in the parameter line of the display. Pressing the
UP ARROW or the DOWN ARROW changes the address number.
Mode
dBm/W Pressing dBm/W changes the measurement dimensions from dBm to
watts. Pressing the button again changes the dimensions back.
REF Pressing and immediately releasing the REF pushbutton puts the
instrument into reference measurement mode where the displayed
measurement is relative to the set reference value. When in reference
mode, the display’s enunciator changes to dB or W, depending on the
mode, and a delta symbol is displayed, right justified, in the enunciator
field.
To set a new reference value, hold REF for five seconds.
View Ref To view the set reference value, press the dBm/W and REF
pushbuttons simultaneously. The value is displayed for 3 seconds in
the parameter line.
Auto/Man Pressing AUTO/MAN changes the instrument’s measurement mode to
either auto, where the gain range is changed through a firmware
algorithm depending on the input, or manual, where the gain range is
set by the user. If the instrument is in auto measurement mode,
pressing either of the arrow pushbuttons changes the measurement
mode to manual. In manual mode, the gain range is displayed on the
parameter line.