[Elecraft] COM port not working

[Joe Subich, W4TV]

> My Edgeport 4 is one of the few adapters that will work reliably at
> the slower data rate required by the K2. Most others do not like to
> run at that slow speed, although I have just tried a Keyspan adapter
> with a K2 that worked just fine.

Quite simply the speed range is in the hands of the chip designer.  The
maximum to minimum speed range of *any* serial port - USB, add-in card,
or mother board is limited to 2^14 due to the use of a 14 bit "baud
rate divisor" in the original PC specification.  Designers can either
go for the old 10 baud to 115,000 baud (or 20 baud to 230,000 baud)
range used by terminals and the like or they can go for a 110 bps -
1 Mbps (or 300 bps - 3 Mbps) used by mass storage applications like
USB drives, flash drives, camera transfers, etc.

A device like the Edgeport that was designed primarily as a terminal
and peripheral server (serial printers, bar code scanners, etc.) makes
an excellent device for amateur use as it even supports 45.45, 50, 75,
100 and 110 baud five bit ("baudot") RTTY.

73,

    ... Joe, W4TV


On 1/19/2013 7:58 PM, Don Wilhelm wrote:
> I can second that.  The Edgeport series are referred to as "converters"
> rather than "adapters", and I believe there is a real difference.  The
> Edgeport converters have been used in commercial applications while most
> adapters are destined for the consumer market.
>
> My Edgeport 4 is one of the few adapters that will work reliably at the
> slower data rate required by the K2.  Most others do not like to run at
> that slow speed, although I have just tried a Keyspan adapter with a K2
> that worked just fine.
>
> 73,
> Don W3FPR
>
> On 1/19/2013 7:34 PM, hawley, charles j jr wrote:
>> The Edgeport 4 port serial to usb converters have been flawless. They
>> use one usb port and i can connect the whole K line into one of them.
>>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>