The logic in the program is: if (iPeriod == 30) { if (Minute == (i + 25) | Minute == (i + 45)) { } } to regulate the time windows where beacons are sent, otherwise arq connections would be disturbed all the time... Of course we can make this more flexible, but that would require a much better and much more restrictive DCD routine. Rein PA0R ====================================== Client is 0.8.9 Beacon QRG nr is 1 (should read "Beacon minute" as in the manual) Second is 40 (on Configuration page. Item is missing on page 19 of the manual. Only a hint, not a complaint ;-) I observe a beacon period of 20 and 40 minutes, like in the example below. Why is it so? 73 Klaus 2011-03-16 05:46:53 UTC: [DL4OAH]>PSKAPR,TCPIP*,qAS,[IS0GRB-3]:!5227.75N/00944.50E-000/000/K3 30m 8.9 2011-03-16 06:26:13 UTC: [DL4OAH]>PSKAPR,TCPIP*,qAS,[9A7AOF]:!5227.75N/00944.50E-000/000/K3 30m 8.9 2011-03-16 06:46:09 UTC: [DL4OAH]>PSKAPR,TCPIP*,qAS,[9A7AOF]:!5227.75N/00944.50E-000/000/K3 30m 8.9