Notch Parameters Section
Notch Active
This check box activates or deactivates the generation of a notch in the equally
spaced multi-tone signal.
Start Tone
It is the index of the first tone to be removed in a notch. Acceptable indexes start
with 1.
Stop Tone
It is the index of the last tone to be removed in a notch. Acceptable indexes start
with 1.
Center Frequency
It is an indicator only. The central frequency for the notch is computed and shown
in this field.
Span
It is an indicator only. The tone-free frequency span for the notch is computed and
shown in this field.
Arbitrary Tones Section
Alternatively, an edition table shows-up for arbitrarily spaced tones definition
(“Arbitrary” selected in the Tone Distribution drop-down list). When not previously
edited (or empty), the table is automatically loaded with the parameters of the tones
defined in the equally spaced tone sections. This allows for easy edition of individual
tones or the creation of multiple notches, or both. Parameters for each tone include its
frequency (in Hz), its relative amplitude (in dB), and phase (in degrees). Entries in the
table may be added, edited, and deleted. Entries in the table may be also sorted in
ascending or descending order of any parameter by clicking in the corresponding field
name.
Addition of a new entry in the table must be done by editing the empty edition field
located at the bottom of the table. Deletion of any number of entries can be performed
by selecting the ones to be deleted and then hitting the <Del> key in the keyboard.
Meaningful numeric values must be typed into the edition fields. Otherwise an error
condition is triggered. While a valid frequency entry must be always entered, any of the
amplitude and phase edition fields may kept empty so they take the default values (0.0
dB for Amplitude and 0.0 degrees for Phase).
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