[RTTY] EXTFSK and Icom 7300

[Joe Subich, W4TV]

On 11/3/2017 12:49 PM, Charles Lind wrote:
> My son just got his general, KD9IWX, and bought an Icom 7300.
> Reading various threads about this rig it seems it will run FSK RTTY
> via a USB cable as long as EXTFSK is used in software.
Chuck, realize the IC-7300 has a single USB UART.  It is not possible
to share that UART (virtual COM port) for both radio control and FSK
without specialized "port splitting" software.

> I recall some concerns about EXTFSK and RTTY timing; does anyone have
> experience with the 7300 and this setup and the quality of the
> signal?
Those timing issues lie in the operating system - whether the FSK port
can be connected to a dedicated "USB Root Hub" in the computer and if
many of the background processes (firewall, anti-virus, online call book
searches, cluster access, etc.) can be minimized.  If the operating
system is hobbled by a slow processor with insufficient (RAM) memory
and is running too many background tasks with too high priority, FSK
will have significant jitter.  If one has a fast, multi core CPU, with
plenty of memory and limits the number of background tasks competing
for CPU time, ETXFSK will be fine on nearly any transceiver.

73,

    ... Joe, W4TV


On 11/3/2017 12:49 PM, Charles Lind wrote:
> My son just got his general, KD9IWX,  and bought an Icom 7300.  Reading
> various threads about this rig it seems it will run FSK RTTY via a USB
> cable as long as EXTFSK is used in software.  I recall some concerns about
> EXTFSK and RTTY timing;  does anyone have experience with the 7300 and this
> setup and the quality of the signal?  Any input appreciated.
> 
> Chuck, N8CL
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