As per the 5000 series specs
, noise figures are presented as :
Noise (on 50 mV range) :
8-bit mode 120 μV RMS
12-bit mode 110 μV RMS
14-bit mode 100 μV RMS
15-bit mode 85 μV RMS
16-bit mode 70 μV RMS
Does this noise represent the AC RMS noise or True RMS noise (--> including the DC component) ?
For comparison, a 4227 on 50mV range with no cable connected to the input produces on a bench test:
average RMS noise: 85 uV
True RMS noise: 250 uV
as measured in Picoscope, with: 50ms time windows, and 1MS settings.
What is the 4227 specs noise please?