Focus the spectrometer

  1. FocusEnsure that the spectrum contains adequate signal as well as some reasonably sharp features that the alignment routine can use to focus (e.g., zero-loss peak or a low energy core-loss edge)

  2. Press the Focus button to automatically focus the spectrometer

  3. Select a EELS Focus option to open a new Tuning dialog box

    • Quick Tune – Corrects first order focus effects; use during an EELS session to top-up the focus
    • EELS FocusFull Tune – Focuses both the first and second order aberrations; useful at the start of an EELS session when a more complete focusing routine is required
    • Manual – Recommend for more experienced users; please see the Gatan Microscopy Suite® (GMS) help file for details

Focus the spectrometer