Language Reference

MKD

Example Use markers to ￿nd the two highest signal levels displayed.

40

OUTPUT 723;"SNGLS;"

Activate single-sweep mode .

50

OUTPUT 723;"STARTWL 600NM;STOPWL 850NM;"

Set measurement range .

60

OUTPUT 723;"TS;"

Sweep trace A.

70

OUTPUT 723;"MKPK HI;"

Place marker on highest sig-

 

 

nal peak.

80

OUTPUT 723;"MKD;"

Activate the delta marker mode .

 

 

Since no value was speci￿ed

 

 

with MKD , it places the delta

 

 

marker at the position of the

 

 

￿rst marker . The delta marker

 

 

is now active and under your

 

 

control.

90

OUTPUT 723;"MKPK NH;"

Move the delta marker to the

 

 

next highest signal level.

Description MKD positions a second marker on a trace relative to the position of the active marker, called the reference marker. Once positioned, the new marker

becomes the active marker and is called a delta marker. The delta marker is positioned in terms of wavelength, or time if the analyzer is in zero span mode. Thus, MKD 0 places a delta marker at the same wavelength as on the reference marker. MKD 10xxx places a delta marker at a wavelength 10 xx higher than the reference marker. If no marker is active, MKD places two markers at the center of the active trace. If more than one trace is active, MKD places the marker on trace A, B, or C, in that order; or on the trace speci￿ed by the MKTRACE command.

The MKD command also activates the relative-marker mode, which displays two markers and calculates the wavelength and amplitude di￿erence between them. When this mode is active, both the MKWL and MKD commands specify the wavelength di￿erence between the delta and reference markers.

See Also SP, MKTRACE

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