George,
Is there a USB to RS232 (serial DB9) dongle out there that will do
this, model and where to buy?
There is no inexpensive USB to serial dongle that will do 45.45 baud
any more. All of the commodity USB to serial UART/Bridge makers have
changed to match the higher data rates of USB 2.0 and in doing so have
dropped (due to the fixed maximum to minimum range) data rates less
than 110 or 300 bps.
There is one maker to US to serial products that still supports the
lower data rates - Digi International in their Edgeport line of
devices intended for commercial terminal use. I the single port
versions listed at Office Depot and Amazon.com in the $70 range. One
can occasionally find 1, 2, 4 or 8 port versions of the Edgeport
device used on eBay for attractive prices but it takes some watching.
Other than the Edgeport USB to serial device, any USB to serial
adapter can be used if you install the EXTFSK driver for MMTTY but
due to the software timing with EXTFSK you will see a +/-10% jitter
in bit timing.
73,
... Joe, W4TV
On 10/31/2013 8:45 AM, George wrote:
I want to run true FSK RTTY with MMTTY and DX4WIN on my laptop computer but
I can't get the MMTTY program to wiggle the FSK frequency with my USB to
RS232 FTDI-A36 cable. It will key my Icom 756 Pro2 but no FSK wiggle.
Is there a USB to RS232 (serial DB9) dongle out there that will do this,
model and where to buy?
I'd like to do the true FSK vs. AFSK if possible with my laptop which of
course, does not have a serial DB9 port.
Thanks.
George W2YJ
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