Datasheet

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 MDO4000C Series with option SA3 or SA6 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.
Spectrogram display illustrates slowly moving RF phenomena. As shown here, a signal
that has multiple peaks is being monitored. As the peaks change in both frequency and
amplitude over time, the changes are easily seen in the Spectrogram display.
Ultra-wide capture bandwidth – Today's wireless communications vary
significantly with time, using sophisticated digital modulation schemes and,
often, transmission techniques that involve bursting the output. These
modulation schemes can have very wide bandwidth as well. Traditional
swept or stepped spectrum analyzers are ill equipped to view these types
of signals as they are only able to look at a small portion of the spectrum at
any one time.
The amount of spectrum acquired in one acquisition is called the capture
bandwidth. Traditional spectrum analyzers sweep or step the capture
bandwidth through the desired span to build the requested image. As a
result, while the spectrum analyzer is acquiring one portion of the spectrum,
the event you care about may be happening in another portion of the
spectrum. Most spectrum analyzers on the market today have 10 MHz
capture bandwidths, sometimes with expensive options to extend that to
20, 40, or even 160 MHz in some cases.
In order to address the bandwidth requirements of modern RF, the
MDO4000C Series provides ≥1 GHz of capture bandwidth. At span settings
of 1 GHz and below, there is no requirement to sweep the display. The
spectrum is generated from a single acquisition, thus guaranteeing you'll
see the events you're looking for in the frequency domain. And because the
integrated spectrum analyzer has a dedicated RF input, the bandwidth is
flat all the way out to 3GHz or 6GHz, unlike a scope FFT that rolls off to
3dB down at the rated bandwidth of the input channel.
Datasheet
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