Test and Measurement Forum

USB isolator, PicoScope 6 crash

Having problems ? let us know the details here

Re: USB isolator, PicoScope 6 crash

Postby bennog » Fri May 06, 2016 8:34 pm

I was in the assumption that 12Mbit is always USB1 / USB1.1 and USB 2.0 always 480Mbit (downward compatible with USB1)

All isolators i found are 'Fully USB 2.0 Compliant' (in my opinion these are still USB1.1 devices)
And because USB2 is backwards compatible with USB1.1 they can claim this.

But it seems you are allowed to call your device USB2.0 with only 12Mbps speed.

Advanced User
Advanced User
Posts: 100
Joined: Mon Nov 26, 2012 9:16 am
Location: Netherlands

Re: USB isolator, PicoScope 6 crash

Postby Misan » Sat May 07, 2016 3:56 pm

Yep, the advertisement around the specs is confusing, who’d think it might be done deliberately?

USB 2.0, as I understand, requires better cable quality for the possibility of High Speed transmission (but also allows 5m instead of 3m).
So saying “USB 2.0, Full Speed only” may translate to “best cable required, simple interface”.

When we see an old USB cable we tend to think “one for all” - but it isn’t.
Even 2.0 marked (?) cables are not always the same (see the Pico cable).

Microtek, famous for scanners, have some (old) tech info re their cables:
http://ww3.microtek.com.tw/tw/uploads/f ... cable3.pdf
Posts: 7
Joined: Mon Apr 18, 2016 10:05 pm

Re: USB isolator, PicoScope 6 crash

Postby modmix » Sun Jun 11, 2017 2:51 pm

Intona USB Isolator allows for 300 mA max. at the isolated side.
My 4227 draws 500mA when attached to an normal USB port.
=> Picoscope 6 will not see that device
,-( Ulli
Posts: 1
Joined: Mon Feb 20, 2012 4:36 pm


Return to Getting Started

Who is online

Users browsing this forum: No registered users and 0 guests