Table of Contents
Advertisement
the continuous average gradually tends to zero (following an
exponential rule) at a rate that decreases as the weight increases.
Deskew - Adjusts the horizontal time offset by the amount entered.
The valid range is dependent on the current timebase setting. Pre-
processing deskew and the Math deskew function perform the same
activity.
Invert - Invert the waveform for the selected channel.
Cable De-Embedding - When measuring serial data signals,
propagation delays from the test cables can reduce the accuracy of
your signal (for example, signal amplitude and risetime), as well as
introduce Inter-Symbol interference. These cable effects can
dramatically alter your serial data measurements and potentially
create mask test violations. The Cable De-Embedding option allows
you to quickly specify the characteristics of the cables (typically found
on the cable's data sheet) in your test setup and analyze your signal
with the effects of the cables removed.
NOTE: The Cable De-Embedding checkbox is only visible with this option.
Interpolation - Linear interpolation, which inserts a straight line
between sample points, is best used to reconstruct straight-edged
signals such as square waves. (Sinx)/x interpolation is suitable for
reconstructing curved or irregular wave shapes, especially when the
sample rate is 3 to 5 times the system bandwidth.
Noise Filter - Enhanced Resolution (ERES) filtering increases vertical
resolution, allowing you to distinguish closely spaced voltage levels.
The tradeoff is reduced bandwidth. The functioning of the
instrument's ERES is similar to smoothing the signal with a simple,
moving-average filter. Use ERES on single-shot waveforms, or where
the data record is slowly repetitive (when you cannot use averaging).
Use it to reduce noise when your signal is noticeably noisy, but you
do not need to perform noise measurements. It also may be used
when performing high-precision voltage measurements: zooming
with high vertical gain, for example.
Optimize - See Response Optimization Modes.
922561-00 Rev A
Getting Started Manual
69
Advertisement
Table of Contents
