A scanning configuration sets certain parameters about the scan taken. Choosing a configuration involves various tradeoffs.
TSH means a Tellspec scan done with Hadamard patterns. That is a way to get more light onto a dark sample, but not lose too much spectral resolution. Hadamard patterns read several separate wavelengths in each step of a scan, and combine them later to get the proper spectrum.
TSC means to use a simple one-wavelength-band at a time to do the scan. It may be used for materials which reflect more light, and do not need brightening.
20X9 means to average 20 separate scans to make the final result. The full spectrum involves taking light from adjacent bands 9 nanometres wide. In the case of Hadamard, there are several bands totalling more than 9 nm at each step, which are later mathematically combined to give an effective width of 9 nm. The actual resolution is slightly less than that obtained in column mode, but the spectrum’s intensity is higher.
Averaging more scans reduces noise in the result, but the scan takes longer and may heat the sample too much.
Wider columns shine more light on the sample, increasing the spectrum’s intensity, but reduce the spectral resolution of the spectrum taken.