Third, with the USB Unifying receiver still plugged into the extension cable, I let the receiver hang within a few inches from the back of the motherboard back panel and not a hint of stuttering.įourth, I purchased a 90 degree USB adapter plug and plugged this adapter into the USB port and the Unifying receiver into the adapter. The stuttering problem returned but only to a very minor degree. Second, I plugged the Unifying USB Unifying receiver back into the extension cable but placed the receiver flat against the motherboard back metal panel just adjacent to the USB port it was previously plugged into. (The extension cable also used this same port) This inspired me to do some experimenting.įirst, I plugged the USB Unifying receiver back into the USB port it was previously connected to and the stuttering problem returned, just as before. I was curious how far the Unifying USB receiver needed to be separated from the back panel/USB port. The mouse now works perfectly with not even the slightest hint of a problem. I am assuming this distance is enough to get the thing out of the RF noise "Near Field". I took a 36" high quality USB extension cable and relocated the Logitech Unifying receiver about 24" horizontally to the side of the computer. The total energy emitted I believe is regulated by law and indeed very small but, relatively speaking, must be high right on the motherboard as is the location of the USB connectors that are part of the motherboard. I think it is very reasonable to assume any motherboard is an excellent source of a lot of RF radiation at multiple frequencies and a Fourier Transform wet dream of wave forms. I had the Logitech Unifying mouse plugged into a USB 2.0 port on the back of my machine in a port integral with the motherboard. Coincident with this I stumbled on an article about RF interference and USB wireless devices and the light bulb suddenly lit. This mouse sucks because the two buttons on the left side are so incredibly sensitive I kept inadvertently jumping between browser pages. So, I threw in the towel last week and bought a hard wired Logitech M500 USB mouse. A call to Logitech tech support got a woman in the Philippines with a heavy accent, scripted only knowledge, and chickens loudly clucking in the background (honestly - she verified she worked from home and the noise was indeed chickens). I Googled the problem and found a ton of stuff going back a number of years referencing this exact problem with Logitech wireless devices but nothing I found proved helpful. Sometimes no problem, sometimes the mouse was unusable, but a problem at some level most of the time. I immediately noticed the cursor would momentarily freeze and the extent to which it froze or stuttered varied with no obvious connection to anything else. I have now left it with the batteries out in the hope that a day or two without batteries will discharge whatever is remembering the connectivity - trouble is for all I know the connection status could be stored in the transceivers rather than in the keyboard.I recently started using a Logitech MX Anywhere 3 wireless mouse using their tiny USB Unifying receiver. I have tried everything I can think of to logically disconnect this keyboard, but to no avail. Whilst trouble shooting the problem I managed to also connect the keyboard to the third transceiver, so now every character comes out once on my laptop and twice on the desktop ((LLIIKKEE TTHHIISS)). This keyboard was being received on two different transceivers at the same time. This morning it took me a while to realise that the strange behaviour on my laptop was caused by someone typing on the desktop keyboard. Until today this keyboard logically connected to one of the two C-B033 transceivers. The desktop PC also has a wireless keyboard, marked Logitech Deluxe 660 cordless desktop.
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