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freezes in stopped mode with slow time-base

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freezes in stopped mode with slow time-base

Postby buttercup » Wed Apr 26, 2017 9:43 am

I’m having a difficulty with Picoscope running XUbuntu on our college physics lab PCs
Picoscope works at higher time-base speeds but freezes in stopped mode when time-base is slowed down to 10seconds per division or below. Picoscope can be unfrozen by closing closed down the program and reopening but then it reverts to high-speed time-base.
The slow time-based is very really handy for timing things passing through light gates.
We are using
XUbuntu 15.04
Release: 15.04
Codename: vivid
i386 32Bit Version
I've copied setup files from the user directory into zip
Many thanks for you support,
Attachments
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Re: freezes in stopped mode with slow time-base

Postby Hitesh » Tue May 02, 2017 9:37 am

Hi buttercup,

What colour USB cable are you using with the PicoScope 2203?

Is it connected to the PC directly or via a (powered?) USB hub?

Thanks,
Hitesh

Technical Support Engineer
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Re: freezes in stopped mode with slow time-base

Postby buttercup » Tue May 02, 2017 11:29 am

Hi Hitesh,
The USB was plugged directly into to PC.
We tried using different usb ports at the back of the PC and also using the ones at the front. We also tried it using a similar XUbuntu PC and always got the same symptoms.
Maybe our PC architecture is unusual (they are all the same make). I'll take one of our Picoscopes home and try it on my home PC and let you know if I experience the same issue.
Many thanks for your help,
Mark
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Re: freezes in stopped mode with slow time-base

Postby buttercup » Tue May 02, 2017 12:35 pm

Hi Hitesh,
I think I was using a dark grey coloured USB lead.
I am making the dangerous assumption that USB leads are relatively inter changeable.
Will try it with the slightly unusual looking Picoscope provided lead and let you know what happens.
Many thanks,
Mark
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Re: freezes in stopped mode with slow time-base

Postby buttercup » Tue May 02, 2017 12:50 pm

Hi Hitesh
Using the original light grey (Picoscope provided) lead did not solve the issue.
I was using a longer lead originally belonging to a printer.
Handy to have a slightly longer lead but I guess its another variable that could cause issues.
Mark
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Re: freezes in stopped mode with slow time-base

Postby buttercup » Tue May 02, 2017 6:04 pm

Tried the college Picoscopes on home PC running XUbuntu and found same freeze problem when timebase is 5 seconds per division or slower.
Mini Gigabyte motherboard with integrated AMD processor
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
amd64
Same problem with 2203 & 2205 Picoscope models.
We have had these Picoscopes for some time now. Could the age of the hardware be related?
Thanks in advance for your advice,
Mark
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Re: freezes in stopped mode with slow time-base

Postby Hitesh » Thu May 04, 2017 2:29 pm

Hi Mark,

Could you please click Help -> About PicoScope 6 Beta... for both products and send a screenshot of each to support@picotech.com along with your contact details?

Regards,
Hitesh

Technical Support Engineer
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Re: freezes in stopped mode with slow time-base

Postby mwr » Tue Sep 19, 2017 3:54 pm

Hi,
I have the same problem with the current version of PicoScope:

PicoScope® 6 - PC Oscilloscope software version: 6.12.9.35
Copyright © 1995-2017, Pico Technology Ltd.

Model: PicoScope 3425
Serial Number: AR012/042
USB Version: 20,0
Calibration Date: Donnerstag, 7. Oktober 2010
Hardware Version: 8
Driver Version: PS3000 Linux Driver, 3.10.0.9

under Ubuntu 16.04 x64

The former version worked ok.
It hangs already when I set the time base to 200ms/div. Just a restart is not enough. I have to unplug the hardware that it is recognized again.
Regards
Michael
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