This might be caused by Windows putting a USB port to sleep. Windows
appears to be unable to detect when many programs, including N1MM
Logger, are using a USB port, and if it is allowed to, it will shut the
port down to save power after a period of assumed inactivity. This will
cause programs using the USB port to lose contact with the hardware they
are controlling.
Try this:
Open Device Manager, select Universal Serial Bus Controllers, and you
will see a list of devices among which may be some "Generic USB Hub"
entries and some "USB Root Hub" entries. For each of those Generic USB
Hub and USB Root Hub entries in turn, right-click on the entry in the
list, select Properties, select the Power Management tab, uncheck the
check box that says "Allow the computer to turn off this device to save
power", and click on OK.
In Windows 7, open Power Options from the Control Panel, click on
"Change plan settings", then click on "Change advanced power settings",
expand the USB settings entry in the list, select USB selective suspend
setting, and make sure it is set to Disabled.
If you sometimes take a break with N1MM Logger or similar software
running, and you don't want the operation of the program to be
interrupted while you are gone, you might also choose to change the
Sleep settings to prevent the computer from automatically going into
Sleep or Hibernate mode (Sleep after = Never and Hibernate after = Never).
73,
Rich VE3KI
K9OM wrote:
For the past couple of years, on the top of the N1MM Logger screen, I often
get the message "K3 VFO A not responding. When I get this message my
computer is locked up and I'm unable to log or transmit. A very bad problem
to have when running stations during a contest. The problem seems to occur
aprx. every 15 minutes when operating RTTY and aprx. every 30 minutes on CW.
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