User`s guide

Chapter 5 Optimizing Instrument Settings

5-48 PerSeptive Biosystems

Default Number of

Data Points/Bin

Size settings

The software uses the following default digitizer settings:

• Number of Data Points—100,000

• Bin size—Smallest possible Bin size to accommodate

the mass range selected.

Number of Data Points and Bin size are dependent

values, if you change one value the other changes. For

more information, see “Mass Range (Da)” on page 5-19.

Overriding

horizontal

digitizer settings

You can override the default digitizer settings:

1. In the Instrument Settings control page, click

Mode/Digitizer.

2. Click Linear or Reflector Digitizer, and select the

digitizer parameter to optimize:

• Number of Data Points—Allows you to select the

memory size available for sampling. Increasing

this value decreases the Bin size. Decreasing this

value increases the Bin size.

• Bin Size—Allows you to specify the Bin size

(nanoseconds). For information, see “Effects of

adjusting Bin size” on page 5-49.

3. Change the Bin size to improve resolution as needed:

NOTE: Setting the Bin size lower than the default calculated

by the system may result in a larger data file size.

Mode Digitizer Bin Size

Linear 1 nsec

NOTE: A Bin size setting below 1 nsec does

not typically improve observed mass

resolution in Linear mode

Reflector 0.5 or 1 nsec