analogdevicesinc
Oscilloscope: Trace averaging
Add trace averaging feature in the oscilloscope, being able to manually configure the number of sweeps to average.
This feature is available in the ALICE app for M2K: https://wiki.analog.com/university/tools/m2k/scopy/oscilloscope#using_built-in_signal_measurement_features
This request comes after receiving feedback on StudentZone(Analog Dialogue) - EngineerZone.
The amplitude went down because you don't have the triggering on. Each waveform buffer added to the average needs to be aligned in time to the same trigger point.
I don't have a working installation of libm2k bindings in Python right now or I'd show you what actually happens to the noise level when using trace averaging. It is most noticeable in the 1V/div and greater settings where the ADC lsb is 10X larger.
ALICE for M1k uses the same technique, obviously, so I'll show the effect with that. Without trace averaging:
With trace averaging (8 traces):
Doug
Thanks for the explanation! By the way, the executable release for ALICE M2K from wiki does not contain the option to set the number of averages. Is a default value used? I'm just curious.
It’s been a very long time since I even opened the m2k code so I don’t even remember what state things were left in. The libm2k version never had a windows executable. You must be using the obsolete libiio code. If there was a default it would have been 8.
Doug
From: Antoniu Miclăuş [email protected] Sent: Wednesday, July 15, 2020 9:29 AM To: analogdevicesinc/scopy [email protected] Cc: Mercer, Doug [email protected]; Comment [email protected] Subject: Re: [analogdevicesinc/scopy] Oscilloscope: Trace averaging (#824)
[External]
Thanks for the explanation! By the way, the executable release for ALICE M2K from wiki does not contain the option to set the number of averages. Is a default value used? I'm just curious.
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