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About PicoScope Test CD Optical Pickup RF signal

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About PicoScope Test CD Optical Pickup RF signal

Postby oasis2016 » Fri Jan 06, 2017 5:03 am

Hello, everyone! I want to use a PicoScope test CD eye, can get very good results?
Because I tried to use the 3206D MSO to test this, but did not get good results.( I'm sorry, my English is very poor.)

What I mean is to use the PicoScope test CD to optical pickup RF signal('eye' pattern), please refer to: https://www.repairfaq.org/REPAIR/F_cdfaqd.html#CDFAQD_004.

The following is the best waveform I get:
20161231-0002.gif


The results obtained with an analog oscilloscopes:
RF Signal.jpg


Hope to get your help, thank you very much! :D
Last edited by oasis2016 on Fri Jan 06, 2017 10:10 pm, edited 1 time in total.
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Re: About PicoScope Test CD Optical Pickup RF signal

Postby Martyn » Fri Jan 06, 2017 8:00 am

Can you please post your psdata file ( File->Save) for the capture you have done, we can then take a look at the settings.

You may need to send it to support@picotech.com depending upon the size of the file.
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Re: About PicoScope Test CD Optical Pickup RF signal

Postby oasis2016 » Fri Jan 06, 2017 3:42 pm

Martyn wrote:Can you please post your psdata file ( File->Save) for the capture you have done, we can then take a look at the settings.

You may need to send it to support@picotech.com depending upon the size of the file.


Thanks Martyn!
Because I did not get the desired effect, so I returned the machine.
I did not save the settings file during the test. But I have the following picture for your reference(May be blurred):
The best RF signal persistence waveform.jpg


Please help me answer, why in my computer to get the refresh rate so low?(This model has a nominal waveform capture rate of 100000 wfms/s, But the fact is not the case, I see a very low refresh rate. :shock: )
My computer configuration is: ThinkPAD X250 (Intel Core i5-5200U 2.20GHz 2.19GHz;8G RAM;Win8.1 64Bit;120G NGFF).

Thanks again! :D
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Re: About PicoScope Test CD Optical Pickup RF signal

Postby Martyn » Mon Jan 09, 2017 3:02 pm

Without a data file it will be difficult to diagnose the issue, and as you have returned the scope we can't ask you to carry out any tests. So I am not sure if will be able to identify this issue.
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Re: About PicoScope Test CD Optical Pickup RF signal

Postby oasis2016 » Mon Jan 09, 2017 9:02 pm

Martyn wrote:Without a data file it will be difficult to diagnose the issue, and as you have returned the scope we can't ask you to carry out any tests. So I am not sure if will be able to identify this issue.

Hi! Martyn, glad you can reply to me.
About the data file, I can try to recall the original settings, generated in the "PicoScope 6" configuration. Data files are only relate to these settings, right?
But I think if you do the same tests on this issue, if you can get a clear pattern of the same texture on a normal CD player or CDROM drive, it means that my machine or my test method is problematic, and that the 3206D has enough power (refresh rate) to do this thing. Maybe I might buy it back again. :P
This is counter-evidence(or example) method used to solve the problem, this does not seem difficult, right?
Of course, at last still very grateful for your help.
Thanks! :D
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Re: About PicoScope Test CD Optical Pickup RF signal

Postby Martyn » Wed Jan 25, 2017 7:10 am

I will need to see if I can find a CD ROM drive/player that I can try the tests on, I have nothing to hand at the moment.
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Re: About PicoScope Test CD Optical Pickup RF signal

Postby oasis2016 » Sat Jan 28, 2017 11:39 pm

Martyn wrote:I will need to see if I can find a CD ROM drive/player that I can try the tests on, I have nothing to hand at the moment.

Thank you Martyn!
I look forward to your test results! Maybe it can change my view of the picoscope. :D So far I have hesitated about my choice. :(
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