The baseline root mean square (RMS) noise was measured with the analog frontend switched on and off. Results are shown in Table II for both DRS4 readout and transparent modes. When the DRS4 chip is recording, its transparent mode can be enabled or disabled. However, no significant difference in the RMS noise has been found when comparing these two modes of operation. The noise in transparent mode also depends on whether the DRS4 chip is simultaneously recording or not. Therefore, the RMS noise of both configurations is listed.