[Elecraft] How to test serial communications?

[Bill VanAlstyne W5WVO]

Pete,

If you are using HyperTerminal (or most other terminal emulation programs), 
you can turn "local echo" on or off. When doing the kind of testing you're 
doing, I turn it OFF to avoid confusion.

(1) In the New Connection - HyperTerminal screen, select File >> Properties.

(2) In the New Connection Properties dialog box, click the Settings tab, 
then click the ASCII Setup... button.

(3) In the ASCII Setup dialog box, make sure the "Echo typed characters 
locally" checkbox is UNCHECKED.

(4) Click OK to commit the ASCII Setup settings.

(4) Select the COM port you are going to test in the New Connection 
Properties dialog box and click OK to commit all settings for that port.

Then the only thing that will appear on your screen as you type are the 
looped-back characters.

Hope this helps --
Bill W5WVO

--------------------------------------------------
From: "Pete Smith" <n4zr at contesting.com>
Sent: Monday, June 07, 2010 4:17 AM
To: "R. Kevin Stover" <rkstover at mchsi.com>
Cc: <Elecraft at mailman.qth.net>
Subject: Re: [Elecraft] How to test serial communications?

> Thanks, Kevin.  I assume (though the referenced test procedure doesn't
> say it), that with pins 2 and 3 shorted to each other, each character
> you type on hyperterminal should be echoed on-screen twice, once locally
> and once by the loopback.  If that's the case. then it may be that I
> just have a bad *computer* port, which would be good news indeed.
>
> 73, Pete N4ZR
>
> The World Contest Station Database, updated daily at 
> www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at 
> reversebeacon.blogspot.com
>
>
> On 6/6/2010 4:51 PM, R. Kevin Stover wrote:
>> I assume you're restarted both the computer and the K3.
>> You need to eliminate either the computer or the K3 as the problem.
>> Test the computer serial port by following these instructions.
>>
>> http://www.reliableracing.com/downloads/LoopBackTest.pdf
>>
>> If the port talks to itself the problem is with the K3.
>>
>> On 6/6/2010 2:13 PM, Pete Smith wrote:
>>> Today we had a heavy lightning storm pass through the area.  All of my
>>> antennas were disconnected, as were all the control cables, but the
>>> computer and my new K3 were still on.  When I returned to the shack
>>> after the storm, everything appears to be working normally *except* that
>>> none of my software can communicate with the K3.  The radio shows no
>>> error messages, and transmits and receives normally - just no
>>> communications.  Alas, I have no other serial devices in the shack, and
>>> my backup computer does not have a serial port, so I can't test to
>>> determine whether it is the port on the computer or the KIO3.
>>>
>>> Is there any diagnostic that can be performed in the K3 to determine if
>>> in fact something's blown on the KIO3 board?
>>>
>>
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