Chapter 3 Peak Detection and Labeling

Table 3-4 Advanced Settings (Spectrum Data Only) (Continued)

 

 

Parameter

Description

 

 

 

 

 

 

Active Range Thresholds

 

 

NOTE: These settings apply to the Detection Range selected, and override the

 

 

Global Thresholds specified on the Basic Settings tab (described on page 3-19).

 

 

 

 

 

 

%BP Intensity

See “%Base Peak Intensity” on page 3-20.

 

 

 

 

 

 

%Max Peak Area

See “%Max Peak Area” on page 3-20.

 

 

 

 

 

 

Minimum Intensity

Specifies the absolute peak intensity below which peaks are

 

 

 

not detected. Calculated relative to zero.

 

 

 

NOTE: Maximum possible intensity for Mariner data is

 

 

 

11,000 counts (spectrum that has not been accumulated or

3

 

 

summed), and for Voyager data is 66,000 counts.

 

 

NOTE: This parameter was previously named Absolute

 

 

 

 

 

 

Threshold.

 

 

 

 

 

 

Minimum Area

Specifies the peak area below which peaks are not detected.

 

 

 

Calculated relative to peak valleys.

 

 

 

Hint: Display the peak list to determine the appropriate area

 

 

 

value to enter.

 

 

 

 

 

 

Noise Threshold

Used to determine peak boundaries. Click the field, then

 

 

 

right-click-drag over a segment of the trace to automatically

 

 

 

set.

 

 

 

For more information, see “Process that Occurs During Peak

 

 

 

Detection, Centroiding, and Integration” on page 3-67.

 

 

 

 

 

 

 

Continued

3-30 Applied Biosystems