Mark and group, When you say the "entire waveform is one symbol," could you expand that a bit. What do you mean by "the waveform." Do you mean the total waveform of the emission spread out over the l KHz or 2 KHz bandwidth?
I am probably just not understanding this correctly but if there are 64 tones that run at the same time and each tone runs 10 or 20 baud, how does the entire waveform equate to one symbol. You would think that if the tones are running simultaneously, even at a relatively slow 10 or 20 baud rate, then the total baud rate would have to be the tones multiplied by the individual tone baud rate. With some waveforms, such as Clover, they only allow one tone to be operational at a given time. Thus if the tone baud rate is 31.25 baud, which it is for Clover II, even though it has four tones, it is still 31.25 baud. If you had a similar mode transmitting all four tones simultaneously wouldn't we consider that mode to be operating at 125 baud? I never realized that there was no similar requirement for a maximum of 300 baud for "image" types of data being transmitted in the phone bands. Therefore, it is clear to me that the data that is being sent as "image," but really is no longer anything like the "image" of the past which were analog streams, is technically not conforming to the rules. Needless to say, this must and will be changed. 73, Rick, KV9U Mark Miller wrote: >A-63 is legal on the ham bands, since each tone runs at 10 or 20 > > >>baud depending upon the commonly used versions of this mode, but has 64 >>tones, it would seem that it is running well over 300 baud when you >>consider the entire waveform. >> >> > >The entire waveform is one symbol. There are 10 symbols per second. > > > > >>The question that I need to be clear on is how many tones are running at >>the *same* time. >> >> > >64 > > > >>If the image sending operators are using QAM 64 (even if it doesn't work >>very well), I ask what is the baud rate of the individual tones and what >>is the total baud rate of the signal? Do the rules exempt voice and >>digital image from the 300 baud limit? If it does then my position would >>be that the FCC would welcome data modes with a total that exceeds 300 >>baud as long as individual tones do not. >> >> > > >There are no enumerated maximum symbol rates in the Phone/Image subbands. > >73, > >Mark N5RFX > > > >Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org > >Other areas of interest: > >The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ >DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) > > >Yahoo! Groups Links > > > > > > > > > > > Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
