Impact of USB cable shield on noise

General discussions
Sasan
Posts: 95
Joined: Sat Jun 27, 2015 1:15 am

Impact of USB cable shield on noise

Postby Sasan » Tue Nov 17, 2015 8:44 am

Hi
Here's the results of a very simple experiment I did:
I chose two USB cables to compare (images are attached)
A 0.5 meter unshielded (blue one)
A 1.5 meter shielded (the other one)
Then I tuned to a local FM station. You can see the effect of shield on the noise. The picture with lots of noise (with RED waterfall) is for the blue cable.
All the parameters in this test were equal and unchanged.
Attachments
With shielded cable.jpg
Using with shielded cable
With shielded cable.jpg (120.79 KiB) Viewed 1926 times
Without shielded cable.jpg
Using with the simple (blue) cable
Without shielded cable.jpg (103.94 KiB) Viewed 1926 times
IMG_2178.JPG
Cables side by side
IMG_2178.JPG (163.32 KiB) Viewed 1926 times
Last edited by Sasan on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason

User avatar
Alastair_BKA
Posts: 9
Joined: Wed Sep 09, 2015 3:22 pm

Re: Impact of USB cable shield on noise

Postby Alastair_BKA » Tue Nov 17, 2015 8:42 pm

Yes a couple of RF Chokes will do wonders for anything that receive or make noise. Your never going to get rid of EMI or RFI but it helps. I am over the top but if we can find a product that stops noise from your electrical outlets. In our world we are really building a Music Studio. Hardware like Icom R-75 or don't suffer so much but sdr equipment does.
Last edited by Alastair_BKA on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason


Return to “General”

Who is online

Users browsing this forum: kayaker2001 and 5 guests