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LabMaster 10 Zi Oscilloscopes
Viewing Waveforms
Display
Oscilloscope display grids present the trace information in a voltage vs.
time format. The oscilloscope analog-to-digital converter (ADC)
information is displayed vertically on the grid with the ADC bits divided
proportionally according to their amplitude on the grid. Channel traces
are typically 8-bits of vertical data, whereas Math traces are 16-bits of
vertical data. Teledyne LeCroy grids consist of eight vertical divisions.
When displaying channel traces on the grid, use of less than full-grid
amplitude results in some reduced vertical resolution and accuracy. For
instance, if a channel trace is displayed as two divisions high on a grid,
the number of ADC bits utilized is...
2/8 * 2^8 or 64 bits
This is quite less than the full 8-bit resolution. Such a reduction in
vertical resolution may be acceptable if the primary measurement
consideration is for rough timing measurements; however, if vertical
accuracy or extreme timing accuracy is a requirement, it is better to
increase the amplitude of the signal to utilize close to maximum grid
height. In order to accomplish this while still providing the ability to
view many signals at one time on the oscilloscope display Teledyne
LeCroy provides multi-grid capability. This creates multiple oscilloscope
grids, each with 8-bit vertical resolution, and allows many full-resolution
grids (but vertically smaller in grid height) for concurrent display
without affecting the vertical resolution.
Different grid displays are available based on instrument and installed
software packages. For example, some displays show side-by-side,
instead of vertically stacked grids. The additional grid displays offer
more convenient views of multiple waveforms. Refer to your instrument
datasheet at www.teledynelecroy.com for detailed information as to
which grid displays are provided with your oscilloscope.
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LM10Zi-GSM-E Rev A
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