
Chapter 5 Optimizing Instrument Settings
5-28 PerSeptive Biosystems
5
Vertical Settings
Vertical Scale Specifies the input range of the digitizer in millivolts. To take
full advantage of the dynamic range of the digitizer, set the
Vertical Scale slightly higher than the signal intensity.
Choices depend on the digitizer model.
For more information, see Section 5.3.5, Understanding
Digitizer Settings.
Vertical Offset Applies a y-offset to the signal to bring the baseline closer
zero counts on the y-axis. This makes data processing easier.
Vertical Offset is a percentage of the Vertical Scale selected.
For example, with a 200 mV Vertical Scale, a 1% offset is
2mV.
Enter or select an offset. Valid entries depend on digitizer
model.
For more information, see Section 5.3.5, Understanding
Digitizer Settings.
Input Bandwidth
(not available with
Signatec digitizers)
Reduces higher frequency noise when analyzing wide (high
mass) peaks.
Choices depend on the oscilloscope model. In general, use:
• Full for no filtering
• Higher settings for larger peptides and proteins
• Lower settings for high mass proteins, for noisy peaks,
or to apply more filtering
For more information, see Section 5.3.5, Understanding
Digitizer Settings.
Table 5-7 Linear and Reflector Digitizer Parameters (Continued)
Parameter Description
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