Re: [digitalradio] Signalink No Good for ARQ Modes
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 > > . > >
Re: [digitalradio] Signalink No Good for ARQ Modes
Hi Bonny, so what's better instead of signalink sl1+/ usb 73, Jürgen DG8FDD - Original Message - From: expeditionradio To: digitalradio@yahoogroups.com Sent: Tuesday, August 26, 2008 6:51 PM Subject: [digitalradio] Signalink No Good for ARQ Modes > 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 .
[digitalradio] Signalink No Good for ARQ Modes
> 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 .
