EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: EdoFede on December 20, 2015, 03:51:53 pm
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Hi all,
I'm playing around and testing with my new DS2072A scope.
Someone other than me, has noticed different sensibility to noise and mechanical vibration between CH1 and CH2?
I found out by trying to connect two 50 Ohm terminator to the inputs.
CH1 got some spikes with terminator attached, CH2 near-no difference.
(500uV/div)
Without terminators:
(https://www.eevblog.com/forum/testgear/rigol-ds2000a-ch1ch2-difference-in-noise-and-mechanical-vibration-sensibility/?action=dlattach;attach=188496;image)
With terminators:
(https://www.eevblog.com/forum/testgear/rigol-ds2000a-ch1ch2-difference-in-noise-and-mechanical-vibration-sensibility/?action=dlattach;attach=188498;image)
Another strange behaviour I've noticed is a big difference in sensibility to mechanical vibration between CH1 and CH2.
Tapping front panel:
(https://www.eevblog.com/forum/testgear/rigol-ds2000a-ch1ch2-difference-in-noise-and-mechanical-vibration-sensibility/?action=dlattach;attach=188500;image)
Closing top handle:
(https://www.eevblog.com/forum/testgear/rigol-ds2000a-ch1ch2-difference-in-noise-and-mechanical-vibration-sensibility/?action=dlattach;attach=188502;image)
Not a big issue, but strange, not?
I've also noticed a slight positive DC offset (about 0.2div) on CH1, even after auto-cal run.
Bye,
Edoardo