[time-nuts] HP 58503A Com 4 conflict

Rex rexa at sonic.net
Mon Jan 5 00:40:10 EST 2015

You left out a lot of details, like what OS your PC is running, Assuming 
it is Windows XP or greater, you may be able to juggle the assigned com 

If you are using a USB/serial adapter, be sure it is plugged in so it 
shows on the devices list.

You need to open Device Manager. One way is Start/settings/Control 
Panel. If it is Win 7+ Device Manager should be in the list. If XP, 
select System, the Hardware tab at the top, then the Device Manager 
button. -- I don't have a Win 8 machine; I assume it is the same as Win 7.

Find your serial device under 'Ports (Com & LPT)'. If you are not sure 
which one and it is a USB adapter, you can unplug it and see which one 
goes away.
Double-click on the one you want to change. In the window that opens, 
select the Port Settings tab at the top.  You'll get a window with the 
baud rate, etc. Select the Advanced button. Then in the lower left of 
the window is the assigned Com Port. Click the pull-down triangle button 
and you'll get a list where you can select a different Com Port number. 
If all the ones you want are flagged with (In use), you may have to back 
out and try to find a listing for the device that is using a low Com 
port and select it to change its number higher to free the one you want 
to use. I'm not sure what happens if you try to change to a port that is 
(In use). Maybe it tries to work it out for you. I haven't tried it.

I'd suggest Com 4 or Com 2 as your best choices.

So I don't have an exact answer. It depends on what is using the lower 
numbers now, Hopefully you can rearrange them using this method to find 
something that works.

On 1/4/2015 7:50 AM, James Robbins wrote:
> My new old HP58503A wants to connect to my PC on Com 1-4.  Other PC devices are already using those 4 Com ports.
> Is there any way to connect it to a Com port other than one of those 1 to 4?
> I currently use an Edgeport USB-to-Serial Converter which works very well to communicate with the PC and to assign Com ports to my various GPS units.  But, as far as I know, the chosen Edgeport Com port must fall within the range of Com ports which for which the device is designed.
> If this has been answered, please point me to the discussion.  Many thanks.  And, Happy New Year to all, with wishes for a more peaceful (and timely - couldn't resist) year.
> Jim Robbins
> N1JR
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