The FCC rules are antiquated. Sending anything other than voice or image is illegal there if you use only one sideband. However, if you use both sidebands (B7W, B8W or B9W), any content is legal.
73, John KD6OZH ----- Original Message ----- From: Rick W To: digitalradio@yahoogroups.com Sent: Friday, March 27, 2009 13:56 UTC Subject: Re: [digitalradio] Easypal in MARS Although Easypal is currently the primary digital SSTV program , it also can be used to transmit any kind of data. A very experienced digital ham took me to task a while back for making this claim since he understood it to always compress data with a lossy characteristic and could not be used for something that could not tolerate any loss. Of course he did not realize that the program provides for both kinds of data. The current digital SSTV programs moved hams (almost overnight) from RDFT to what must be DRM QAM and seems to be the most successful scheme for the minimum speed needed for a reasonable time in transmitting images of the size and resolution that has become common. In fact, as I was writing this, the SSTV group on 7.173, which is very active here in the U.S., was sending a text message in the past minute or so, discussing the coming April Fool's computer virus. Ironically, they are probably operating illegally since text data is not legal to send on the phone/image portions of the bands. But then again maybe it can be called a Fax transmission? If that is true though, then why could not any other multitone digital mode be considered fax? Why not a two tone mode? Why not a single tone mode? 73, Rick, KV9U Andrew O'Brien wrote: > - > >> As an aside, if you really want to see something that is slick, give Easy >> Pal a shot for sending text. Also ultra high resolution pictures with no >> scan lines that occupy 20KB of data on each end. 90 seconds to send or >> receive, with the ability to only request the individual blocks that weren't >> received properly to be sent again. We are also utilizing it in MARS. >> >> As I said, I am still optimistic, >> >> David >> KD4NUE >> > > > David, I am interested to learn of this. Rick , myself , and several others in this group played around with EasyPal a year or so ago, we also thought it had interesting uses for file transfers. How it are MARS folks accepting EasyPal? > > Andy K3UK > >
