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Remote Operation
Example Programs
Example 7. Trace normalization
Description
This program demonstrates trace normalization. Normalization is used to
observe changes to a displayed response. For example, run the program and
then bend the fiber to observe the change in signal level across the spectrum.
Trace C displays the difference between trace A and trace B.
Program
PRINT “OSA Normalization Example”
OUTPUT 723;”disp:wind:text:data ‘OSA Normalization Example’”
!
!*********************** Initialization Routine ******************
!
PRINT
OUTPUT 723;”*rst” ! Preset the instrument
PRINT “Presetting the instrument”
!
PRINT
OUTPUT 723;”disp:wind:trac:all:scal:auto” ! Automeasure
PRINT “Performing Automeasure”
!
PRINT
OUTPUT 723;”cal:alig:mark1” ! Perform an autoalignment
PRINT “Performing Autoalign”
!
!******************************************************************
!
PRINT
! Next line is the operation complete query used so that the text is not printed
! until after the Autoalign is complete
OUTPUT 723;”*opc?”
ENTER 723;Dum
PRINT “... measurement begins”
!
OUTPUT 723;”Sens:Wav:Cent 1315 nm”
OUTPUT 723;”Sense:bwid:res 10nm” ! Fix resolution bw
!
OUTPUT 723;”Init:Imm”
!
! Trace A is the active trace
OUTPUT 723;”Disp:Wind:Trac:Stat TrA,On” ! Turn on Trace A
OUTPUT 723;”Trac:Feed:Cont TrA, Alw”
!
! Trace B is the reference trace
OUTPUT 723;”Disp:Wind:Trac:Stat TrB,On” ! Turn on Trace B
OUTPUT 723;”Trac:Feed:Cont TrB, Alw”
!
! Trace C displays the difference between A & B
OUTPUT 723;”Disp:Wind:Trac:Stat TrC,On” ! Turn on Trace C
OUTPUT 723;”Trac:Feed:Cont TrC, Alw”
!
OUTPUT 723;”Trac:Feed:Cont TrB,Nev” ! Stop updating B
book.book Page 26 Monday, January 31, 2000 10:34 AM
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