Language Reference

MKPITX

MKPITX

Control the excursion value for marker pit operations.

Item

Description

 

Pit-Excursion Range

 

0.01 {

300

dB

 

 

Step Increment

 

1 scale

division during log mode. 1 scale division

at top graticule line

 

 

 

(.915 dB) during linear mode.

 

 

Preset State

 

MKPITX

3DB

 

Example

100 OUTPUT

726;"MKPITX 6DB;"

Set the pit excursion value

to 6dB.

Description Just as MKPX sets the peak excursion value for marker peak operations, MKPITX sets the pit excursion value for marker pit operations. The MKPITX

command speci￿es the minimum signal excursion for the marker-pit functions (MKPK). Signal movement less than the pit-excursion value is not considered a pit. To be a pit, the skirt of the signal response must dip by at least the pit-excursion value, and then rise by at least the pit-excursion value.

The default pit-excursion value is 3 dB for pits displayed on a logarithmic scale. This means that any pit with an excursion of less than 3 dB on either side of its bandwidth shape is not identi￿ed as a pit. If the marker-pit command, MKPK MIPIT , is executed on such a pit, the optical spectrum analyzer does not place a marker at the pit. For signals displayed on a linear scale, the default pit excursion equals

excursion = 1

0 10

MKPITX

 

200

7-285