Author Topic: What did you do with or to your oscilloscope today? (Read 6175 times)

JohnnyG56 · « **on:** April 23, 2020, 01:40:32 pm »

Are you working on a project that required its use? Maybe troubleshooting a problem? Maybe making modifications to it? Post the detail and maybe some pictures/video's here.

JohnnyG

newbrain · « **Reply #1 on:** April 23, 2020, 03:59:50 pm »

I pined for it...it's several thousand km away!

rstofer · « **Reply #2 on:** April 23, 2020, 04:35:56 pm »

It's nothing really important, I was just using my Analog Discovery 1 to look at a stepper motor project on a Raspberry Pi. I had thought the AD1 was toast when I bought the AD2 but it turns out that it still works fine.

What you see is 2 of the 4 phases of a 5 wire stepper. I could use my DS1054Z to see all 4 phases but there's no point. And then there is the 27" screen thing...

rstofer · « **Reply #3 on:** April 23, 2020, 05:13:13 pm »

Not today, but recently...

I am a huge fan of analog computing and Damped Harmonic Motion (same as RLC circuit) is a classic topic in second order differential equations.

There are two different equations patched on that panel. The DHM problem is over on the left and uses just 2 of the 4 integrators.

DimitriP · « **Reply #4 on:** April 23, 2020, 08:47:05 pm »

I turned it on. It works!

RoGeorge · « **Reply #5 on:** April 24, 2020, 06:43:59 pm »

Does measuring a permanent magnet counts if it was not today?

0culus · « **Reply #6 on:** April 24, 2020, 07:02:54 pm »

Turned the 7904A on to see if any signal was coming out of my new-to-me 5087A distribution amplifier. Discovered I had connected the 1PPS instead of the 10 MHz to the input while rearranging.

SilverSolder · « **Reply #7 on:** April 24, 2020, 07:44:48 pm »

Quote from: RoGeorge on April 24, 2020, 06:43:59 pm

Does measuring a permanent magnet counts if it was not today?

I like that one!

GreyWoolfe · « **Reply #8 on:** April 24, 2020, 08:46:02 pm »

Quote from: DimitriP on April 23, 2020, 08:47:05 pm

I turned it on. It works!

Wish I could say the same. Turned on my Hantek DSO5102B and blank screen. Happened before and being lazy at the time, only replaced the bulging cap. Time to open it up again and order ALL the caps.

Dwaine · « **Reply #9 on:** April 25, 2020, 02:21:17 pm »

Checked if my gpsdo Star4 10mhz square was still alive. Terminated into 50ohm.

RoGeorge · « **Reply #10 on:** April 25, 2020, 03:01:19 pm »

The overshoots looks very big for a properly terminated line, isn't it? Is that an artifact of the oscilloscope's probe, because of being overcompensated, or is it how the 10MHz signal for that particular GPSDO model really looks like?

Elasia · « **Reply #11 on:** April 25, 2020, 03:06:14 pm »

I will be unboxing a brand new Siglent SDS2000X Plus as soon as the mail truck gets here!

Old Printer · « **Reply #12 on:** April 25, 2020, 08:36:25 pm »

What did you do with or to your oscilloscope today?

And now for something a little different

For the last forty years or so I have experienced "extra heartbeats" PVC's - premature ventricular contractions. It has been well diagnosed and monitored by cardiologists and is said to be harmless. I have been having an increased amount of them lately, and my wife, a RN (retired) said she would love to have a look at a ECG, she gets them as well. I ordered a small heart rate monitor board form Sparkfun for $20 based around the Analog Devices 8232 chip. It is pretty much some op amps and associated filtering which can output directly to a scope, or an Arduino. The day before it arrived the extra beats went away, as they often do, for several weeks, but showed up again yesterday. So I had a chance to hook it up and check it out. One look at the screen on my 1104X-E and she said, "yup, PVC's, you're fine" and went back to sewing face masks for family and friends

So that's what I did with my scope yesterday.

tautech · « **Reply #13 on:** April 25, 2020, 08:46:36 pm »

Blue Print button saves straight to a USB stick.

Old Printer · « **Reply #14 on:** April 25, 2020, 10:48:39 pm »

Quote from: tautech on April 25, 2020, 08:46:36 pm

Blue Print button saves straight to a USB stick.

Ah, so no need to go through the save menu?

tautech · « **Reply #15 on:** April 25, 2020, 10:51:36 pm »

Quote from: Old Printer on April 25, 2020, 10:48:39 pm

Quote from: tautech on April 25, 2020, 08:46:36 pm
Blue Print button saves straight to a USB stick.
Ah, so no need to go through the save menu?

Correct unless you need to save an inverted (white background) screenshot or in some other file type other than .png.

SilverSolder · « **Reply #16 on:** April 26, 2020, 12:29:40 am »

I've been using my scope to find a way to determine the rotational position of the armature of a small electric motor while it is at speed. There is no way to mount an encoder anywhere... and the motor is sealed. What to do?

On the scope, the top trace is the current drawn by the motor (monitored with a uCurrent Gold).

The bottom trace is from a Hall sensor mounted on the motor to pick up internal currents in its windings as it commutates. It looks like a combination of the two waveforms can be used to determine the position reasonably well, so now I've got something to work with.

Old Printer · « **Reply #17 on:** April 26, 2020, 12:35:31 am »

SilverSolder, This looks interesting! Hope you will keep us posted or start a thread on your project.

Simon_RL · « **Reply #18 on:** April 26, 2020, 04:06:53 am »

Used my Hantek DSO4254C (upgraded DOD4204C) to see if the upgrade of my Hantek HDG6082B had worked. Well the short answer is nope. Obviously I am going to need to do more than just edit the system.inf file. That worked with the DSO.

After “upgrade” you can set the output to 200Mhz Sine wave, but that is not what is output, total crap actually. I found I could drive the bw as far as 89Mhz, then at 90Mhz the amplitude doubles but waveform is stable. Then after that everything turns to shit. Oh well, given I don’t currently need an FG/AWG further investigation of this hack will have to wait. Learning electronics is a far greater priority.

On the upside I learnt a lot more about my scope and correct probing techniques. So it was not a total waste of time.

vk6zgo · « **Reply #19 on:** April 26, 2020, 05:09:54 am »

Looked across the lab while I was letting the dogs out---------Yep, still there!

Although the dogs sleep in the lab, neither of them is a "Lab".

keystone · « **Reply #20 on:** April 26, 2020, 07:50:07 am »

Been trying to read the nvram contents of my TDS640A. So far, no luck. Also trying to get the service port connection to work with a cable. No luck.

wolfy007 · « **Reply #21 on:** April 26, 2020, 08:37:10 am »

Just powered everything on (everything works) and quick look at SigGen compared to GPSDO before I reconfigure the RF rack and equipment in it.

TomS_ · « **Reply #22 on:** April 26, 2020, 09:02:30 am »

Quote from: newbrain on April 23, 2020, 03:59:50 pm

I pined for it...it's several thousand km away!

Mine too. Almost exactly the other side of the planet.

SL4P · « **Reply #23 on:** April 26, 2020, 09:05:42 am »

I moved house, the scope was one of the first to relocate.

tautech · « **Reply #24 on:** April 28, 2020, 09:27:27 am »

Pre delivery checked three different SDS1000X-E models, 2 of which required FW updates and the mandatory Self Cal's.
Compensated probes for each too. Company stickers placed and back into their boxes.

Booted the flagship ~~SDS5054X~~ SDS5104X to check a menu for a post.


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Author Topic: What did you do with or to your oscilloscope today? (Read 6175 times)

JohnnyG56

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