Set the marker frequency. This is the frequency at which the signal on the
front-panel Strobe Out connector goes to a logic low during the sweep. The
Strobe signal always goes from low to high at the beginning of the sweep.
Select from 1 µHz to 240 MHz (limited to 5 MHz for ramps and 80 MHz for
arbitrary and square waveforms). The default is 500 Hz. MIN = the start or
stop frequency (whichever is lower). MAX = the start frequency or stop
frequency (whichever is higher). The :MARKer[1|2]:FREQ? query
returns the marker frequency in Hertz.
When sweep is enabled, the marker frequency must be between the
specified start frequency and stop frequency. If you attempt to set the
marker frequency to a frequency not in this range, the instrument will
automatically set the marker frequency equal to the start frequency or stop
frequency (whichever is closer).
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