Thank you Gerry. I think that probably sums up the issue I was having. The company purchased the 2204A on a whim, mostly on my recommendation to use it as a low frequency component/network analyzer. (At $130, they couldn't say no!) To be honest, I didn't even realize that its sample depth was only 8...

Here was my original intended reply to bennog, which I was preparing while Gerry responded: Thank you. Understood about the memory depth. But, I guess I don't understand why the other posters recommend higher memory depth when most power supply control loops have cutoff frequencies usually not above...

I hope to make a purchase this week, but am hoping someone can chime in with some feedback first.

Thanks.

I found some good advice in this thread, searching the keyword "stability": https://www.picotech.com/support/search.php?st=0&sk=t&sd=d&sr=posts&keywords=stability&t=14311&sf=msgonly&ch=-1&start=15 Based on this feedback, it seems that the main priorities are resolution (ENOB) and memory depth. I don...

Hi all, Company I worked for bought a 2204A a while ago. Nice scope for the price. Recently, I attempted to do a frequency response analysis (gain/phase) of an offline AC-DC switch-mode control loop with 2204A and got non-sense results. I'm using a roughly Lm = 100mH (nom.) injection transformer. Th...

Hi Glubb, I opened a support case. Xujie recommended to try a different USB cable. (Seems like an "obvious" thing to do, but I had not done it.) The issue is gone when using any other USB A-to-B cable, other than the blue one shipped with the unit. Very strange as I have no idea what kind of interna...

Hi Martyn, I'm not exactly sure what you mean. I only took a screenshot once the noise bursts started to appear. For about 2 minutes, the trace was flat at 0V. For slow time-base like 1sec/div, the trigger is just rolling. We have 5 other bench top scopes without any noise sensitivity issues, all in...

Hello Martyn,

Please see the attached with 200mV vertical scale on both channels.

I will contact the support email.

Thanks,
Tim

Hi Benno, Thanks for replying. I've already tried with my phone powered down. The laptop does not have any sort of GSM/CDMA card. I've also already tried with WiFi switched off. I will try to short the inputs...I imagine the noise will go away. I put a benchtop scope across both inputs. The noise is...

Hi all, Purchased our first Picoscope this week. We bought a 2204A to do some control loop measurements. I am seeing periodic bursts of noise on both channels, even with nothing connected to the inputs. The bursts appears at 1.0-1.2 second intervals, are about 50-100ms long, and the content within t...