# more AA6YQ comments below
+ On the Configuration window's CW tab, what option is selected in the Keying panel?
Serial port RTS port 4
* What's connected to COM4' s RTS signal?
USB Keying (CW) and
USB Keying (RTTY)
USB Send is connected to DTR
according to the setup in my IC-7300
# Thanks. That configuration produces the least reliable CW timing, as it relies on Windows, which is not a realtime operating system.
# Assuming you have Commander running, set WinWarbler's CW Keying panel to "Xcvr Ctrl App". Then WinWarbler will send CW by directing Commander to send CI-V commands to your IC-7300, which will generate CW with rock-solid timing.