Attachments show the spectrum in the unit of count/rHz.
Typical DAC noise level is 3e-3 count/rHz = 1e-6 V/rHz.
In the case that the spectrum goes lower than the DAC noise level, actual DAC output is contaminated by the DAC noise.
This measurement templates are in the /users/DET/template/dtt/*
ETMY TM and BS TM are not contaminated DAC noise at least below 900Hz.
