[RTTY] USB to Serial Convertors

[Richard Ferch]

Andrei,

Does this work for FSK from MMTTY *without* using EXTFSK?

As far as I am aware, basically any USB-to-serial adapter will work with 
EXTFSK - there's nothing remarkable about that. It's using them directly 
without the help of EXTFSK that is the problem.

The reason I ask is that according to the specifications at the link you 
gave, the minimum speed of this one is 300 baud.

The same question applies to the Digi Edgeport multi-port devices. I 
don't see a minimum speed mentioned in the specifications at the Digi 
web site, but the maximum speed mentioned is high enough to raise 
concerns. The reason most USB adapters don't work at low speeds, as I 
understand it, is that there is a limit to the dynamic range of speeds 
they will support, and in order to support very high speeds (230 kbps 
and up) they give up support for very low speeds. In addition, they may 
also give up support for 5-bit word lengths, since very high-speed 
applications probably use only 8-bit words.

73,
Rich VE3KI


Andrei Stchislenok wrote:

> I have been using this one for last four years - no problem...
> 
> Dual Port USB to Serial RS-232 DB-9 Adapter Cable FTDI Chip $39.98
> 
> http://www.usbgear.com/computer_cable_details.cfm?sku=XC-232-C&cats=199&catid=626%2C106%2C199%2C465