User manual

Analyze Wavefor
morTraceData
Auto-magnify
As you adjust the horizontal scale control to faster time/division settings, the MDO3000 Series automatically increases the
sample rate to keep acquiring the same record length in the shorter period of time. Eventually though, the MDO3000 Series
hits its maximum sample rate. Once the instrument is at its fastest sample rate, further changes to faster timebase settings
cause the oscilloscope to operate in A uto-magnify mode, where the oscilloscope shows the fa ster desired time/division
setting and continues to acquire the desired record length. The result is that the oscilloscope cannot show all of the acquired
points within the desired time/division setting.
Instead, the oscilloscope shows you only a portion of the entire record in the time-dom ain graticule. This feature provides you
with a way to magnify a portion of the record without having to use the smaller zoom screen display. This feature g ives you
the maximum benefit of the sample rate / record length combination in your oscilloscope. With Auto-magnify, you have
access to the full record length at the maximum sample rate.
NOTE. Auto-magnify only comes on when the zoom feature is turned off.
1. The entire acquisition is indicated by the
horizontal bar in the upper display.
2. The portion of the acquisition shown in
the time domain graticule is shown within
the part of the upper display defined by
the brackets.
MDO3000 Series Oscilloscopes User Manual 153