Hi Bonnie, The SL-1+ has a TX delay of 28ms on its fast setting.
I first tried using direct PTT for ALE400 FAE (like I do for Pactor) but found no noticeable difference in performance versus the SL-1+ VOX PTT. Does it really make that much difference? 73 Sholto. expeditionradio wrote: >> Sholto Fisher wrote: >> Bonnie and all, >> I use the SignalLink SL-1+ (older version, not USB) >> for ARQ modes successfully. I use MultiPSK and the >> ARQ modes I have tested and had >> working are: ALE 141A, ALE400, Pax/Pax2 and Packet. > > Hi Sholto, > > The fact that you were able to make contacts > with ARQ using Signalink is not an indicator > that it is good for ARQ. > > In ALE, with the Signalink, you would absolutely > not be transmitting the first group of symbols of > each transmission. The Signalink timing just isn't > sufficient to do the job. The errors in your > transmission may have been corrected by FEC or ARQ. > > But, your empirical evidence of "success" is more > an indicator of the good redundancy and Forward Error > Correction of the robust mode, rather than success for > the Signalink :) > > 73 Bonnie VR2/KQ6XA > > . > >
