The usage of different sensor types also gives rise to the necessity of different measurement signal amplifiers and signal pre-processing, respectively. Therefore, charge amplifiers are used for acceleration and force signals, while the voltages produced by the strain elements are directly (not amplified) used as control signals.
Nevertheless, in order to enhance signal quality by suppressing cross-talk between the channels differential amplifiers are used. A customized measurement system
type MAS-10 which consists of a 19 inch rack housing contains the above mentioned charge amplifiers as well as signal pre-treatment devices such as the above mentioned
low-pass-filters and differential amplifiers. As already mentioned in the introduction, this configuration keeps the need for customized measuring equipment to a minimum.