On 1/5/2016 5:32 PM, Doug Person via Elecraft wrote:
A 4-port card is NOT a native RS-232 port. PCI is just another bus
add on.
*Absolutely incorrect*. A USB to serial converter *of any kind* -
other than the Edgeport products - can not do 45.45, 50, 75 or 100
baud RTTY. All of the multi-port RS-232 PCI and PCIe cards handle
that task with no problem (although Windows will set 45.45 baud to
45 baud because the API is integer based).
PCI and PCIe based serial and parallel port cards are true memory
addressed ports like motherboard or (obsolete) ISA bus ports - not
USB devices that suffer from latency and driver buffer issues.
73,
... Joe, W4TV
On 1/5/2016 5:32 PM, Doug Person via Elecraft wrote:
A 4-port card is NOT a native RS-232 port. PCI is just another bus add
on. There no difference between running 1 or 4 USB to RS-232
converters. You can buy a 4 port FTDI converter that runs off a single
USB port from Amazon that will run everything you could ever want. I
run 80's vintage lab equipment off them and they don't know the difference.
Also, don't get Windows 7 or 8. Windows 10 is the only choice for
Windows. 7 and 8 are obsolete and support will get lighter and lighter
and then vanish completely.
Doug -- K0DXV
On 1/5/2016 12:24 PM, Cliff Frescura wrote:
I agree with N1MGO,
I've come full circle on this one and am in the process of removing
all of
the USB/RS-232 converters in my setup and reinstalling a 4 port card
that I
had in an old XP system (drivers work fine).
Determining what is a quality USB/RS-232 serial adapter is not always
clear.
There are potential driver issues as well as suspect RF shielding.
Some of
these devices don't enable you to securely connect to both ends (no screw
connections, so the connector is not securely seated). They are just
another (additional) point of failure. Plus you are also now dealing
with
limitations of USB (re: polling).
The FTDI chipset and drivers seem the most reliable and if you want to
take
apart your newly purchased converter, you can determine if the chipset is
counterfeit.
http://hackaday.com/2014/02/19/ft232rl-real-or-fake/
If you need only 1 RS-232 port I would go with a converter, but once
you get
above 2, then I think it is a good choice.
73,
Cliff K3LL
-----Original Message-----
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tim
Tucker
Sent: Tuesday, January 05, 2016 10:44 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] suggested PC???
I haven't had used a "real" (old fashioned) serial port on any PC that
controls radio equipment in probably 10 years. It's really not
necessary if
you purchase quality USB/Serial adapters (no fake chipsets) where needed.
The only PC I have with a old-fashioned serial port is an ancient Toshiba
laptop I keep around that runs DOS so I can program old Motorola radios.
On Tue, Jan 5, 2016 at 10:19 AM, Gordon LaPoint
<gordon.lapo...@gmail.com>
wrote:
You should consider adding real RS232 ports, at least 2 or 4 if you
will ever run two radios, and even more if you want to control rotors,
amps
(KPA-500) or other accessories.
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