Why do DACs often use USB B for the USB input?

[dasdoing]

View attachment 312559

yea, that's the real problem....even when you have the right side many times it wont go in and you than try the wrong side.

 

[KSTR]

his is the reason why I guess USB Type-B is still being used. P.S. you can observe that in other types of USB cables, the shields on both ends are connected, except for Type B.
If you find a USB Type-B to A cable with the shield connected on both ends, I think it’s likely an non-standard cable as bottom picture, shield connected on both ends.

Look like the secret?????????

With all due respect, stop spreading bullshit, Sir!

From USB 2.0 Specification:

The "drain wire" is part of the physical shield:

True laboratory grade USB2.0 cables have a better shield connection, true 360 degrees circumferential, and also tend to have ferrites on both ends.

The shield connection inside the devices can be either direct short or capacitive, but open shield is not allowed, for EMC reasons.

And, the GND connection must also be established on both sides, otherwise the interface may not work or hardware even get damaged when there is a significant potential difference on the "GNDs".

----:----

If you have a GND loop problem, use an USB Isolator device.

 

[kamorn]

With all due respect, stop spreading bullshit, Sir!

From USB 2.0 Specification:
View attachment 390849

The "drain wire" is part of the physical shield:
View attachment 390850

True laboratory grade USB2.0 cables have a better shield connection, true 360 degrees circumferential, and also tend to have ferrites on both ends.

The shield connection inside the devices can be either direct short or capacitive, but open shield is not allowed, for EMC reasons.

And, the GND connection must also be established on both sides, otherwise the interface may not work or hardware even get damaged when there is a significant potential difference on the "GNDs".

----:----

If you have a GND loop problem, use an USB Isolator device.

Oh, you right thank you

 

[LesterHiggins]

Did not realise A to A was verboten. Explains a lot.

Almost as bad as going A to M