What test are referring to? If you find some documented test results of a real field test then please let us know otherwise I for one don't know what test you are referring to.
And what do you mean "had hoped the D-Star rigs could be changed to analog"? D-Star is a digital audio format, analog audio is, well, analog audio. What exactly are you asking here because it still doesn't make sense. All of Icom's D-Star capable radios are also analog capable. Icom claims they compress the D-Star voice into a 6Khz channel (their data capabilities use more bandwidth). A comparison of two-way radio systems to HDTV or Direct TV isn't going to work as they are all generally different media (two-way is terrestrial, Direct TV is satellite, and HDTV is often cable). Yes, analog signals with path noise are often still discernible and digital audio is often there or not. I suggest you read up on modern voice encoding/decoding methods for a better understanding. Remember, D-Star is an open, published standard. Icom America offers a link to the JARL documentation as does the JARL. Gary "Ron Wright, Skywarn Coodinator" wrote: > Hi all, > > Thanks for the many responses, but guess no one had the answer to my > question. > > So I will try again. > > I am interested in the parameters of the D-Star vs analog test. It > seems the testees had 2 receivers at a site, one D-Star and one > conviental analog and made a transmission on each for the recording. > > My question was the rigs/power/antennas/etc the same on both. A test > of 10 W with D-Star and analog 1 watt HT does not address the issue. I > had hoped the D-Star rigs could be changed to analog making the only > difference the modulation, rx and tx. > > Digial has invaded so much with much improved results. Easy to see > with Direct-TV or digital cable or fiber, as I have now, and it is > worlds improvement over the old analog. Same with HDTV over NTSC TV > and not just because higher resolution. However, many 2-way radio > systems complain about digital with variations in signals digital often > has problems. With analog one might be noise, but can get the > transmission, but as many have said with digital you are there or not, > no in between. > > Just wanted to know if the D-Star and analog test parameters. > > 73, ron, n9ee/r
