Here with the help comes the USB Isolator being a separate device, it can be installed in any computer setup to block the noise and create a clean USB audio signal from a scratch resulting in major sound quality improvement. Less lucky are the owners of mini-PCs, laptops, macbooks and micro streamers that can not be upgraded like this, at least not their USB outputs. Music lovers who use desktop PCs can greatly enhance playback quality through the use of specialized USB Audio cards, linear power supplies and other accessories which can convert a regular desktop PC into a hi-end digital audio transport, often superior to those offered by hifi manufacturers. High end music servers and streamers include some sort of filtering to minimize this harmful noise. computers in every audio systemĭigital audio playback nowadays almost always involves computers in one form or another, wheter it is a desktop PC, a laptop or a dedicated streamer – all these devices generate noise, because they are packed with switching power supplies and high frequency chips. This is particularly interesting with the use of noise sensitive audio devices such us USB Digital-to-Analog Converters (DACs) and USB-to-S/PDIF converters (DDCs). The PC side uses an ASIX USB to Ethernet chipset and uses an Ethernet mag jack, so it would give you whatever isolation level that a mag jack can do.USB Isolator is a device designed to block computer noise from getting to USB equipment which is connected to the PC. You can even sniff the traffic using a packet sniffer and it's just all TCP/IP traffic. To use the USB over Ethernet functionality, you need to install the software that comes with it that creates some kind of tunnel. I've used some of these before: It uses standard Ethernet to transmit the data, the computer end of the device is just a USB to Ethernet device and will function as so if you load the chipset manufacturer's drivers. I would be reasonably sure that the cat5 version uses the same mag jacks as you would normally use for Ethernet. Since the fiber ones use standard multi-mode SFP modules, they are easily serviceable. I would recommend using an add-on wall-wart rather than the USB port to power the device as we've had them cut out when the load gets too much. We've used the Icron fiber devices where I work. Worked great for the few things I had to (re)configure over USB He said that if he would do that, he would always short something out and kill it. A fellow intern, which is a bit more sloppy with everything, was a bit nervous seeing that. So I disassembled one and directly connected the crimps on the headers, with no connector. At internship I didn't have the right cable for an industrial USB boxed header connector (like onboard of a MB). That experience gave me so much trust in this laptop I'm not afraid of blowing it up. I shorted out the +5V to pretty much anything whilst completely messing up (and messing up the fixes!) the pin-out of an USB B connector, and the only damage I did was to my projects. This is ofcourse on a laptop (Samsung R510 AS02) and not in my own hobby space. What exactly have you blown? I also played with projects at internship and college with USB. Though, I did spent 170$ or so on my MB, so I guess it *should* have some protection. I paid close detail on when purchasing my last PC whether they contained them, but I actually couldn't find any motherboard without. I see on many modern motherboards polyfuses now. The device is powered from the motherboard after all. There is a chance they probably don't have any fuse and will probably blow the motherboard anyway. Laptop for 'debugging' via scope and such only? Futhermore, how big are the odds you need your logic and scope simultaneously? (scope: signal quality, logic: protocol debugging) I don't think a PCI-e device will work though like james suggests. Like a RS-232, bus pirate and low-bandwidth thing is probably something you can run on a hub plus 12mbit isolator. This also stresses the disadvantage of high-speed USB devices on USB. And working on it from the 'workstation' isn't convenient. This of course brings issues if you have 2 USB devices, because USB on the laptop still has the same ground. This does have the consequence not being power limited I think, because I have blown 2A MOSFETs on my PICKIT2 before (bloody PICKIT software hang and accidently shorted the power output, smoke ) If you want to 'isolate' a single USB port, you may find it convenient getting an old laptop and use that. Works fine, own power brick so it's (hopefully) not drawing any power from the PC to power the devices. At home I always use a $10 Sweex (I believe this is a local dutch el-cheapo brand) USB hub.
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