Specify a value for the Maximum Delta Mass parameter to indicate whether the application should apply a delta mass filter and exclude from the final result peptide matches with a larger mass difference between the theoretical and the found peptide m/z.
Use a value within the range of 0.0–5.0 Da or 0.0–5000 ppm. The default is 0 ppm. If you set this parameter to zero, the application does not apply a delta mass filter.