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Touchstone files

This example shows how to use objects in a Touchstone file without opening AEDT.

To provide the advanced postprocessing features needed for this example, Matplotlib and NumPy must be installed on your machine.

This example runs only on Windows using CPython.

Keywords: Touchstone, report.

Prerequisites

Perform imports

from ansys.aedt.core import downloads
from ansys.aedt.core.visualization.advanced.touchstone_parser import \
    read_touchstone

Download example data

example_path = downloads.download_touchstone()

Read the Touchstone file

data = read_touchstone(example_path)

Demonstrate post-processing

Plot serial channel metrics

Get the curve plot by category. The following code shows how to plot lists of the return losses, insertion losses, next, and fext based on a few inputs and port names.

data.plot_return_losses()
data.plot_insertion_losses()
data.plot_next_xtalk_losses("U1")
data.plot_fext_xtalk_losses(tx_prefix="U1", rx_prefix="U7")

True

Visualize cross-talk

Identify the worst case cross-talk.

worst_rl, global_mean = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=True,
    curve_list=data.get_return_loss_index(),
)
worst_il, mean2 = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=False,
    curve_list=data.get_insertion_loss_index(),
)
worst_fext, mean3 = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=True,
    curve_list=data.get_fext_xtalk_index_from_prefix(tx_prefix="U1", rx_prefix="U7"),
)
worst_next, mean4 = data.get_worst_curve(
    freq_min=1,
    freq_max=20,
    worst_is_higher=True,
    curve_list=data.get_next_xtalk_index("U1"),
)

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Download this example

Download this example as a Jupyter Notebook or as a Python script.