Instrument Type:
Detector
Type:
Integer
Value Range:
Detector-dependent
Default:
0 [nm]
Related Commands:
Description:
The Bandwidth command specifies the optical bandwidth [in nm] at which a chromatogram (UV VIS channel) is recorded. In general, this corresponds to the Optical Resolution of a detector.
Function:
You can simulate (i.e., increase) the bandwidth by averaging several single photodiode signals. This process is known as Photodiode Bunching. Averaging is performed symmetrically to the selected wavelength. Thus, at a bandwidth of 31 nm and a wavelength of 255 nm, the signals of all photodiodes between 240 and 270 nm are averaged.
Tip:
Changing the bandwidth can often increase the sensitivity. Quadrupling the bandwidth almost halves the noise. However, in this case, linearity usually decreases.