Hello John, TKS for the report of this long QSO.
>Under poor conditions it is important to avoid collisions by typing and ending >with an "over" sign, be it BT,K or In the last test version, I have integered a Sholto Fisher idea to limit collisions, which is the following: If A receives a frame from B there is a big probability that A receives a new frame from B. Previously, if A had something to send, A directly sent his frame if the channel was free. With a big probability there was a collision between the A frame and the B frame. Now, if A has to send something, in this configuration, there will be an enforced small delay before A transmission, so as to be able to detect a frame from B. So A will detect the B frame and will send his message with the acknowledgment of the B frame and there will be no collision. So I think this problem is partially solved, partially because it is impossible to avoid collisions. But collisions are managed by the protocol and there is no problem. However, if the channel is very noisy (let's say under -10 dB) it could be possibly difficult to recover the normal exchange. The softs (of A and B) have one minute to recover the link, afterwards there is an automatic disconnection. I think this delay (one minute) is superior to the duration of a simple QSB, during which the signal can be lost. 73 Patrick ----- Original Message ----- From: John Bradley To: digitalradio@yahoogroups.com ; [EMAIL PROTECTED] Sent: Saturday, November 17, 2007 6:23 PM Subject: [digitalradio] ALE400 Hi All; Yesterday used ALE400 in a long QSO with EA3AFR, Txema, on 14094.5 . Conditions were not the best, yet We were able to chat for about 30 minutes despite some QRM/QSB. The software was very impressive, Working well even down to my noise floor. Under poor conditions it is important to avoid collisions by typing and ending with an "over" sign, be it BT,K or -.- , and this avoids getting out of sync. Under strong signal conditions it doesn't seem to matter much who is typing, since it all comes through. Patrick you have a real winner with this software and am looking forward to playing more. I am currently on 14094.5 , 1625 centre, if anyone wants to try a connect... I won't be around but feel free to play. John VE5MU DO70QK
