Language Reference

FFT

Execute fast Fourier transform.

 

Item

 

 

Description

Window-L ength

Range

Equals

source

length.

Source-L ength

Range

1 { 2048. Default for TRA, TRB, TRC is 800.

Destination-L ength Range

Equals

source

length.

Example Connect a 750 nm signal to analyzer input.

120

CLEAR 723

 

Initialize analyzer .

130

OUTPUT 723;"IP;";

 

 

140

OUTPUT

723;"CLRDSP;";

 

150

OUTPUT

723;"CENTERWL

750NM;"

Set center wavelength.

160

OUTPUT

723;"SP 0;ST

50MS;"

Set span to zero. Set sweep time.

170OUTPUT 723;"TWNDOW TRC,FLATTOP;" Place the window algorithm, FLATTOP, into trace C.

180

OUTPUT 723;"CLRW TRB;"

Clear-write trace B .

190

OUTPUT

723;"BLANK TRA;"

Blank trace A.

200

OUTPUT

723;"SNGLS;TS;"

Activate single-sweep mode and sweep

 

 

 

trace B.

7-138