The active amplification chain consists of two separate highspeed amplifiers from Texas Instruments as shown in Fig. 3. The first fixed-gain amplifier (THS4302) adds 14 dB to the singleended input while the second amplifier (THS4508) performs conversion from single-ended to differential signals and adds 6 dB gain. In order to protect the input electronics and simplify dealing with individual common mode levels, AC coupling is used throughout the amplifier chain. The bandwidth of the amplifier chain alone is greater than 1 GHz. The input baseline can be adjusted within the entire linear range of the DRS4 chip, which allows the mapping of arbitrary signals. This is achieved with a digital-to-analog converter (DAC), which can apply an individual DC offset to the differential input lines. The difference between the two DC offsets essentially shifts the baseline.