I have a trigger that is syncronized to an amplifier output that I'd like to measure with the AD2 scope. From other experiments I know this trigger signal is synchronized to within 10-20ns to the amplifier ouput. I'm using the Record feature and capturing 48 repeat 100-ms measurements of this waveform at 500kHz sampling (2us period). I also have averaging turned on.
The plot below shows a small segment of the waveforms with all 48 measurements overlaid. As you can see there is noticeable timing jitter that covers 2us across all the measurements. I'm inferring this comes from the AD2 averaging 2-us blocks in a continuous running mode and then just providing me the nearest sample following the detected trigger. As a result the samples may be provided anywhere from 0 to 2us after the trigger signal is detected. Is this correct?
Are there any options I can use to preserve processing gain (by averaging) but give me samples without this timing jitter? I'm not quite sure what the oversampling option does. Brute force I could turn the sampling up much higher (say 20MHz) and then just average after to 500kHz samples but wondering if there is a better option.
Question
Adam K
I have a trigger that is syncronized to an amplifier output that I'd like to measure with the AD2 scope. From other experiments I know this trigger signal is synchronized to within 10-20ns to the amplifier ouput. I'm using the Record feature and capturing 48 repeat 100-ms measurements of this waveform at 500kHz sampling (2us period). I also have averaging turned on.
The plot below shows a small segment of the waveforms with all 48 measurements overlaid. As you can see there is noticeable timing jitter that covers 2us across all the measurements. I'm inferring this comes from the AD2 averaging 2-us blocks in a continuous running mode and then just providing me the nearest sample following the detected trigger. As a result the samples may be provided anywhere from 0 to 2us after the trigger signal is detected. Is this correct?
Are there any options I can use to preserve processing gain (by averaging) but give me samples without this timing jitter? I'm not quite sure what the oversampling option does. Brute force I could turn the sampling up much higher (say 20MHz) and then just average after to 500kHz samples but wondering if there is a better option.
Thanks!
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