T R O U B L E S H O O T I N G A N D M A I N T E N A N C E
Troubleshooting Guide
70
FPM-8200
C H A P T E R
5
Optical Measurement Problems
Line Voltage Setting
Line voltage settings are only changed by qualified, factory authorized personnel.
Contact ILX Lightwave Customer Service for more information. See Returning an
Instrument on page xi for contact information and instructions.
Is the FPM−8200 ANSI/IEEE 488.2
compatible?
•
The FPM−8200 is not fully compatible with the ANSI/IEEE 488.2
standard. However, it is used sucessfully by hundreds of
customers.
•
The FPM−8200 is IEEE/488.1 compliant.
Problems using the Device Clear
•
The DCAS interrupt is not connected to the necessary
microprocessor for clearing bus−hung conditions via Device Clear.
•
The firmware does not terminate or complete all commands upon a
Device Clear because of firmware/hardware timing issues and
GPIB architecture.
Problems using white space
•
IEEE 488.2 specifies that white space characters are ignored, but
the meter does not always ignore them.
Exponential Form problems
•
IEEE 488.2 specifies that either an upper of lower case "e" is
acceptable in exponential data forms. The FPM−8200 does not
always recognize the lower case"e". Use an upper case "E".
*TST command does not execute
•
*TST does not execute on this instrument.
Message Available or User−Request
bits not found
•
Not implemented on this instrument.
Addressing the instrument problems
•
Repeat addressing is required by the instrument.
Symptoms
Corrective Actions
Inconsistent Readings
•
Verify the quality of cleave and the placement in the bare fiber
holder.
•
Verify the fiber ferrule is clean.
ZERO function does not work.
•
Error message E−531 normally indicates there is too much room
light for a proper ZERO. The connector must have an adaptor with
dark fiber attached.
•
Connector adaptor: Make sure you have a patchcord connected.
Leave the other end of the patchcord connected to your source with
its output set OFF.
Symptoms
Corrective Actions
Summary of Contents for FPM-8200
Page 2: ......
Page 8: ...L I S T O F FIG U R E S vi FPM 8200...
Page 10: ...L I S T O F TA B L E S viii FPM 8200...
Page 16: ...WA R R A N T Y xiv FPM 8200...
Page 36: ...FR O NT PA N E L O P E R A T I O N Operating Guidelines 20 FPM 8200 C H A P T E R 2...
Page 96: ...80 FPM 8200 A P P E N D I X A...
