Current requirements for the USB-Serial adapter can be seen by running a system report (About This Mac, then click on then System Report button). Then, select the USB entry under Hardware. If you have a lot of devices, figuring out which it is could be a challenge, but it will most likely be one of the FTDI interfaces. My KUSB shows a current requirement of 90 mA.
The Mac will try to put all devices on the USB to sleep when it goes to sleep, whether they are connected to a hub or not. When the Mac is awakened, it will try to reinitialize the ports as they were before the sleep condition, but if it is not doing this, then the software program should catch the wakeup notification and re-initialize the port. If it does not, you should file a bug report with the software package’s author to let them know they have something to fix. MacLogger DX is pretty good; it would surprise me if this isn’t already being done, but dropping an email to them is still a good idea. Note that the USB stack is being reworked for El Capitan, so until the final release, you may see major changes in the way things work. Things have become much better since the first developer release, but there are still tweaks occurring with each subsequent release as problems are uncovered. Jack Brindle, W6FB > On Sep 7, 2015, at 3:40 PM, David Ahrendts <davidahren...@me.com> wrote: > > Many thanks for the half-dozen direct responses off list. Most of you run a > powered USB hub for the KUSB (or several). May I ask what type/brand powered > hub are you successfully using with your Mac device for the KUSB or multiple > KUSBs? > > It appears the chip in the KUSB can be interpreted as a real power hog, and > the Mac Mini, MacBook Pro, iMac will protect against unusual drain. It just > shuts off the USB port after a little warning. A powered hub would certainly > remove that load from the Mac. > I will also admit to being one of the million or so Mac beta testers and > we’re currently on OS X El Capitan beta Version 10.11 (15A278b). And believe > me, there have been/are plentiful Mac sleep-wake issues before they finalize. > > David A., KC0XT, LA > > >> On Sep 7, 2015, at 2:39 PM, David Ahrendts <davidahren...@me.com> wrote: >> >> What can ya do to keep your fabulous Mac OS X device (in my case a Mac Mini) >> from kicking off the KUSB when it goes to sleep? Trying to keep MacLogger >> connected to the K3S via it’s KUSB for several days at a time (like Labor >> Day weekend). It appears to get kicked off for inactivity as a power drain >> which requires (I know, poor me!) re-starting the Mac Mini to re-initialize >> the USB port with the KUSB. Not a big thing, but maybe there is a way to >> refresh the USB devices connected (a Mac issue). Anyone? >> >> >> David Ahrendts davidahren...@me.com <mailto:davidahren...@me.com> >> >> >> >> > > > > > David Ahrendts davidahren...@me.com > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to jackbrin...@me.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
