The CR-160-R9.1 is an evaluation board for the CR-200-XX series of Gaussian shaping amplifier modules. The CR-160-R9.1 makes it easy for the casual experimenter to use the CR-200-XX, providing BNC connectors for input and output as well as sockets for the insertion of a CR-200-XX shaping amplifier module and (optionally) a CR-210-R0 baseline restorer module. To provide flexibility in the implementation of the CR-160-R9.1, the BNC connectors have been provided unassembled to the CR-160-R9.1 board. The CR-160-R9.1 also includes an adjustable low-noise wide-band amplifier having gains adjustable from 0 to 100. Combined with the CR-200-XX gain of 10 (8 in the case of CR-200-50ns), this allows an overall gain of 0 to 1000. Furthermore, an inverted-polarity signal is available, as well as adjustments for pole-zero correction and DC offset.