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Response optimization modes – Teledyne LeCroy WaveRunner 6 Zi and 12-Bit HRO Getting Started Manual User Manual

Page 73

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Getting Started Manual

922136-00 Rev A

65

B

Invert - Invert the waveform for the selected channel.

Cable De-Embedding - When making measurements on serial data
signals, losses in the cables used in the test setup 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 available if you have

the option. Learn more about this software option and

Contact Teledyne

LeCroy for Support

.

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, on the other
hand, 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.

Response Optimization Modes

Frequency response and group delay of the oscilloscope contributes to the
pulse response characteristics of the oscilloscope. By slightly adjusting
these characteristics using digital signal processing, the characteristic
response of the oscilloscope can be optimized for your specific application.