retzner@ihlpg.UUCP (Retzner) (08/21/85)
I am posting this request to gain information for Art Reis K9XI, editor of 220 NOTES. BACKGROUND: There is a strong start of packet radio on 2 meters at 1200 baud. This strong start has already brought congestion in certain areas especially on 145.01 Mhz. There are current plans to build backbone systems on 220 Mhz. It would be beneficial set aside segment of the 220 Mhz band for packet use. It also might be useful to move some of the local traffic (QTH to backbone, QTH to QTH) to 220 Mhz. 2 meters upper baud limit is 1200 baud, the 220 Mhz upper baud limit is 19200. QUESTIONS: 1) What frequencies on 220 Mhz should the backbone systems use? 2) What frequencies on 220 Mhz should local traffic use? 3) Should local traffic stay at 1200 baud or would 9600 baud be more efficient? 4) How much bandwidth is needed for the higher baud rates? 5) Should more elaborate signaling techniques be used for the higher baud rates to keep the signal's bandwidth to a minimum? 6) How much must a radio be customized for PSK operation, can the radio be modified for PSK and still be used for FM voice communications? If you any other ideas or concerns that I did not think of please comment on those also. I will try to summarize the responses for the net. Thanks and 73. Bill Retzner WB9QXJ ihnp4!ihlpg!retzner