MDO4000B Datasheet, PDF (5/28 Pages) List of Unclassifed Manufacturers – Mixed Domain Oscilloscopes

Mixed Domain Oscilloscopes — MDO4000B Series
Key spectral parameters are adjusted quickly with the dedicated front-panel menus and
keypad.
Intelligent, efficient markers
In a traditional spectrum analyzer, it can be a very tedious task to turn on
and place enough markers to identify all your peaks of interest. The
MDO4000B Series makes this process far more efficient by automatically
placing markers on peaks that indicate both the frequency and the
amplitude of each peak. You can adjust the criteria that the oscilloscope
uses to automatically find the peaks.
The highest amplitude peak is referred to as the reference marker and is
shown in red. Marker readouts can be switched between Absolute and
Delta readouts. When Delta is selected, marker readouts show each peak's
delta frequency and delta amplitude from the reference marker.
Two manual markers are also available for measuring non-peak portions of
the spectrum. When enabled, the reference marker is attached to one of
the manual markers, enabling delta measurements from anywhere in the
spectrum. In addition to frequency and amplitude, manual marker readouts
also include noise density and phase noise readouts depending on whether
Absolute or Delta readouts are selected. A "Reference Marker to Center"
function instantly moves the frequency indicated by the reference marker to
center frequency.
Automated peak markers identify critical information at a glance. As shown here, the five
highest amplitude peaks that meet the threshold and excursion criteria are automatically
marked along with the peak's frequency and amplitude.
Spectrogram
The MDO4000B Series includes a spectrogram display which is ideal for
monitoring slowly changing RF phenomena. The x-axis represents
frequency, just like a typical spectrum display. However, the y-axis
represents time, and color is used to indicate amplitude.
Spectrogram slices are generated by taking each spectrum and "flipping it
up on its edge" so that it's one pixel row tall, and then assigning colors to
each pixel based on the amplitude at that frequency. Cold colors (blue,
green) are low amplitude and hotter colors (yellow, red) are higher
amplitude. Each new acquisition adds another slice at the bottom of the
spectrogram and the history moves up one row. When acquisitions are
stopped, you can scroll back through the spectrogram to look at any
individual spectrum slice.
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