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UV_PREVIEW Limitations

        UV_PREVIEW  cannot  identify lines if there are two few channels. It
    will only display the spectra in this case. A minimum of 32 channels  is
    required,  but  confused spectra may also prevent a proper line recogni-
    tion.

    The line detection is based on the current specified velocity.  If  this
    is  incorrect,  lines may appear shifted and considered as not detected.
    PREVIEW%TOLERANCE indicates the matching precision in frequency (default
    is 2 MHz).

    If  variable  \sicvar{REDSHIFT} exists, the frequency scale is corrected
    for that source Redshift, so that line identification remains possible.


Gildas manager 2023-06-01