Search found 59 matches

by lab!fyi
Tue Feb 12, 2019 8:31 am
Forum: PicoScope 6 for Windows
Topic: How can I save measurements data?
Replies: 18
Views: 14049

Re: How can I save measurements data?

This may be of some help: https://www.eevblog.com/forum/testgear/picoscope-2000/msg1905005/#msg1905005 Python script to gather "infinite stats" (by default PS6 is limited by stats over 1000 measurements). This can be easily modified to output CSV since "machine readable" output is already parsed fro...
by lab!fyi
Mon Jan 07, 2019 8:26 pm
Forum: PicoScope 6 for Windows
Topic: Poor bandpass filter :-(
Replies: 2
Views: 659

Re: Poor bandpass filter :-(

If this is of any help I sometimes managed to get little better results by nesting filters with same params eg this for 20MHz: BandPass(BandPass(A,19999990,20000010),19999990,20000010)
by lab!fyi
Wed Dec 19, 2018 10:56 am
Forum: USB PC Oscilloscopes
Topic: High Pulse Width measurement
Replies: 4
Views: 2552

Re: High Pulse Width measurement

Following may be of some use if want to have arbitrary and fixed ref level for measurements w/o configuration like Pulse Width, Duty etc: In this example ref level is set to 0V, so can be steered around on real signal with DC offset (or additional math). Clip signal -100mV...+100mV: ((abs(A-0.1)-(A-...
by lab!fyi
Mon Dec 10, 2018 4:19 pm
Forum: PicoScope 6 for Windows
Topic: Calculating time difference between two signals
Replies: 8
Views: 2904

Re: Calculating time difference between two signals

For signals with approx. same frequency, example on channels B, C - calculates unsigned difference: B=1MHz, C=1.01MHz graph(delta(B,C)) = duty((((atan(1/tan(pi*(B/10000)))/pi)+(B/10000))*-((atan(1/tan(pi*(C/10000)))/pi)+(C/10000))))*(1/200)*(1/freq(C)) B=1MHz, C=1MHz, 15° phase delta(B,C) = ((((atan...
by lab!fyi
Mon Nov 05, 2018 10:29 am
Forum: PicoScope 6 for Windows
Topic: does Picoscope understand encoder quadrature inputs?
Replies: 2
Views: 562

Re: does Picoscope understand encoder quadrature inputs?

If you need to visualize on scope to compare with other signals etc you can decode with MCU (Arduino for example) and feed the numerical result as bit pattern into MSO digitals, which can be shown as analog graph of changing value. https://www.picotech.com/support/topic27831.html https://playground....
by lab!fyi
Sat Oct 27, 2018 8:54 pm
Forum: PicoScope 6 for Windows
Topic: multiple time rulers
Replies: 6
Views: 1412

Re: multiple time rulers

One can use multiple viewports to view same signal and gain extra set of rulers with each one.
by lab!fyi
Mon Oct 22, 2018 8:04 am
Forum: PicoScope 6 for Windows
Topic: Picoscope 6 - Serial Decoding
Replies: 6
Views: 2137

Re: Picoscope 6 - Serial Decoding

Bump, issue is still in the air:
http://www.eevblog.com/forum/testgear/b ... msg1893938
User cannot automate decoded data export because macro recorder does not see SD window. Also it might be problem that SD/Export does not offer auto naming of export file.
by lab!fyi
Tue Oct 09, 2018 10:07 pm
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7229

Re: Phase shift measurement

It may not be looking at the zero crossing. Apparently not. That's because it does not calculate phase difference ;) From wiki: power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless nu...
by lab!fyi
Tue Oct 09, 2018 9:39 pm
Forum: PicoScope 6 for Windows
Topic: Integral, time, complex formula issues.
Replies: 5
Views: 1898

Re: Integral, time, complex formula issues.

Hi, magenta trace - derivative(A) lime trace - (A[0.000000002]-A)/0.000000002 Latter is 1 sample point time advanced (2ns) due to nature of function. Cant integrate none of them. Only way to make ref wfm and integrate then. Result perhaps sheds some light why it is not working in real time. purple t...
by lab!fyi
Tue Oct 02, 2018 10:02 am
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7229

Re: Phase shift measurement

When it comes to simulation would you say that an Arduino that has two sinewave outputs so that you could delay one of them to get the 44 deg shift? You mean Due? Due is good fast board can do a lot with it. With Uno can hook up two MCP4725s or even just PWM and and make it a sine using physical lo...
by lab!fyi
Sat Sep 29, 2018 11:47 am
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7229

Re: Phase shift measurement

Hello and thanks for the great help. In the earlier simulations you did how were you able to shift chB red trace around 60 degrees or so? It is actually 44°, scaling may give wrong impression. But simulation is exactly that, simulation - all smoke and mirrors ;) Actual data is coming in from signal...
by lab!fyi
Fri Sep 28, 2018 12:17 pm
Forum: PicoScope 6 for Windows
Topic: Waveform averaging - the PicoScope way
Replies: 25
Views: 20506

Re: Waveform averaging - the PicoScope way

This may be an issue due to the way data is collected and processed on the low memory 2205, which doesn't support memory segments on the device as our other scope models do, instead handling this within the driver and application. Hi, initially I discovered the "walking math" phenomenon on 2408B so...
by lab!fyi
Fri Sep 28, 2018 7:57 am
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7229

Re: Phase shift measurement

Thanks very much for explaining this. In your code you use T. Where is the T in the equation below? To calculate an integral you have to have a T don't you. Technically integral is calculated using this in Pico software, quite different to WolframAlpha examples: https://en.wikipedia.org/wiki/Numeri...
by lab!fyi
Thu Sep 27, 2018 9:49 pm
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7229

Re: Phase shift measurement

Barnett wrote:
Wed Sep 26, 2018 5:55 pm
How do you get 14.88 from integral(A*B)
Ok, enough messing around :roll:
115 * 0.18 * cos(0.768) = 14.89
https://www.electronics-tutorials.ws/ac ... cuits.html
by lab!fyi
Thu Sep 27, 2018 8:22 pm
Forum: PicoScope 6 for Windows
Topic: Phase shift measurement
Replies: 25
Views: 7229

Re: Phase shift measurement

MAX(P(A*B)) integrate (115*sin(x)) * (0.18*sin(x)) * (2/pi); 0 to pi https://www.wolframalpha.com/input/?i=integrate+(115*sin(x))+*+(0.18*sin(x))+*+(2%2Fpi);+0+to+pi P(A*B) integrate (115*sin(x)) * (0.18*sin(x-44pi/180)) * (2/pi); 0 to pi https://www.wolframalpha.com/input/?i=integrate+(115*sin(x))+...