Optical Measurement Problems; Line Voltage Setting - ILX Lightwave FPM-8200 User Manual

5
C H A P T E R
Symptoms
Is the FPM−8200 ANSI/IEEE 488.2
compatible?
Problems using the Device Clear
Problems using white space
Exponential Form problems
*TST command does not execute
Message Available or User−Request
bits not found
Addressing the instrument problems

Optical Measurement Problems

Symptoms
Inconsistent Readings
ZERO function does not work.

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.
70
 FPM-8200
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
Corrective Actions
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.
•
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.
IEEE 488.2 specifies that white space characters are ignored, but
•
the meter does not always ignore them.
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 does not execute on this instrument.
•
Not implemented on this instrument.
•
Repeat addressing is required by the instrument.
•
Corrective Actions
Verify the quality of cleave and the placement in the bare fiber
•
holder.
Verify the fiber ferrule is clean.
•
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.