HP Data Explorer 4 Series - Manual (Page 294)

Chapter 6 Using Tools and Applications
6-24 Applied Biosystems
6
3. Select the method to use, then right-click-drag on peaks
in the trace to enter the associated values displayed for
the method you select:
• Auto—Right-click-drag across the apex of the
peak for signal-to-noise calculation. The
software automatically calculates the average
noise across the entire spectrum.
The noise calculation is not affected by the
presence of peaks or a poor baseline.
• Manual—Right-click-drag across the apex of
the peak for signal-to-noise calculation.
Right-click-drag across a flat region of the
baseline to use to determine the RMS noise
for the calculation.
NOTE: If you enter a baseline value instead of
right-click-dragging, the software uses an RMS
value of 1.000 to perform the signal-to-noise
calculation.
4. Click OK. The result is displayed in the Output window.