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MKTYPE
Marker Type
The MKTYPE command specifies the kind of marker,
Specifying MKTYPE AMP allows markers to be positioned according to amplitude, as shown in the line below,
which positions a marker on a signal response at the -3 dBm level.
The program line below returns the 3-dB bandwidth to the controller.
10 0UTPTJT718;"TS;MKPKHI;MKD;"
20 OUTPUT718; "MKTYPE AMp;MKA-3;"
30 OUTPUT718;"MKD;MF?"
40
END
Line 10 executes a sweep, places a reference marker at the signal peak, and enables the delta marker mode.
Line 20 searches for an amplitude that is 3 dB below the reference marker at the signal peak, because the delta
marker mode is active.
The MKD in line 30 establishes the marker that is 3 dB below the peak as the new reference marker. However,
since the amplitude and reference markers cannot occupy the same position, the analyzer searches again for an
amplitude 3 dB below the signal peak and places another marker there. The MF? command returns the frequency
difference between the markers.
Specifying MKTYPE PSN allows markers to be positioned according to a horizontal position in display units. The
program line below positions a marker on the third major graticule.
Specifying MKTYPE FIXED allows a marker to be placed at any fiied point on the CRT
254, Programming
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