Cesco, This is ridiculous. In no way did we trash your free mode! And please be aware that RFSM2400 is the same price as EasyPal ... free in terms of monetary cost.
If you look at the results dispassionately, you will see that the SSTV mode did quite well considering it must have been on the edge of the minimum conditions. The kind of conditions are often found on HF. You might clear up one question that I have and that is if I have an image that is larger than 20K and I attempt to send it with the software, it appears to allow for adjustment of the actual size (compression). And a default seems to be 20K in 94 seconds. Is this correct? Now if I was able to get a substantial fraction (1/6) of that through in only 94 seconds, does that mean that over 3000 bytes were moved in that amount of time? If so, that is a higher throughput than the RFSM2400 program. I realize that it is not operating with immediate ARQ, but if you take that into account, it does not seem to be that different. JT65 can not be compared to PSK31 because it has no real throughput. What we are trying to do is compare relative speeds during the same conditions. Those kinds of real world tests seem the most important for actual ham use. The actual speed of around 300 bytes per minute, even if not all that fast, is faster than most other sound card modes at that signal to noise data point. Remember, cesco, we were using images as a surrogate for text data because we can not legally send text data in the voice/image portions of the bands. If we had an important 28K document to send, 12 minutes would be completely acceptable as long as we can guarantee that it will go through error free and had no other way to move the message. In terms of S/N, if you have an average reading of say, -89 dBm with the background noise and then you receive a signal at -76 dBm, are you saying that this relationship has no association with S/N? 73, Rick, KV9U cesco12342000 wrote: >> How is what we tested somehow flawed in your mind? >> > > Compare it to testing psk31 against jt65 at snr's of -20db. > psk31 wont work, jt65 will work. Flawed test. > > Your report of easypal only getting 1/6 of transmission is a clear > indication that conditions or setup were not adequate. I could not even > find what mode or qam type you were using. Flawed test. > > This is no weak signal mode. This mode is NOT automatic and needs quite > some dedication. Comparing this (probably in default config) with an > automatic mode is ... > > >> I do admit that I >> have done some calibration of my ICOM 756 Pro 2 S-meter and can give you >> at least some relative comparisons of dBm levels. >> > > S-meter and SNR have nothing in common. > > > What does enrage me is the trashing of a well established free mode with > the goal to hype up of an expensive software, which, you failed to > mention, proved to be unusable for sstv in your own test (12 min for a > 28kb picture is not acceptable). > > > > > > Announce your digital presence via our Interactive Sked Page at > http://www.obriensweb.com/sked > > > DRCC contest info : http://www.obriensweb.com/drcc.htm > > Yahoo! Groups Links > > > > > > >
