Steve, I think your interest as with many Hams with D-Star is the use of digital voice. We use it every day in cel phones, HDTV is here for some, and with P25 rigs the interest is there. I am sure P25 is great, but experimenting with digital no matter what format is a good start.
My interest with D-Star is how it works. Seen so many times with other services like HDTV and sat and cable digital the better performance. However, many mobile systems get complaints. Often what works in a fixed setting might not be good in a mobile setting. I am waiting for the day when Hams get time-division-muxing with more than one QSO on one frequency like with cel phones. I guess when we have 2 billion people in the US with 10 million hams or most of our VHF & UHF bands have been consumed by the commerical guys it will happen, hi. Imagine having to put all of VHF and above in 1 MHz. I think HF is safe. 73, ron, n9ee/r --- In [email protected], "Steve Bosshard (NU5D)" <[EMAIL PROTECTED]> wrote: > > Took a couple of antique GE Phoenix SX mobile radios. Programmed for 442.0/ > 447.0. With TOT. Carrier Squelch - Took Receiver Un Squelched lead to PTT > thru a one transistor keying transistor. > > Took VOL / SQ Hi and ran it thru a single common emitter stage - bipolar amp > and applied the collector output to the high side of the TX deviation > control and set for +/- 1 Khz TXD. Did have to bypass the emitter leg of > the single stage amp and wallah - DSTAR Repeater - sort of. Maybe P25 > repeater too? Simple - really do need to regenerate the data signal and key > on detected data with a CCD chip to give the preamble tone time to get thru. > > Until P25 radios become ham affordable I don't think they will be mainstream > ham radio. I believe there is still a pretty hefty payment to Moto for use > of the P25 standard, but I may be wrong. > > Steve NU5D > > > On 4/24/07, Jim B. <[EMAIL PROTECTED]> wrote: > > > > James wrote: > > > Bryon Jeffers K0BSJ wrote: > > >> > > >> Well I will agree with Nate on this one.. The crazy D-Star will only do > > >> it's AMBE digital and will not pass analog voice... > > >> > > >> At least when using a Quantar/Quantro with P25 capability you can set > > it up > > >> with CAI (Clear Air Interface)/P25 IMBE and it will do either analog > > voice > > >> > > > PSST ... hey there ... :) Doesn't CAI stand for Common Air > > Interface. (Thats > > > the Astro IMBE that all the manufacturers support, wheras BIG M used to > > have the > > > AMBE version) > > > > Yup! But don't use the term Astro. Astro is a Motorola trademark, like > > Private Line (PL)! > > > > IMBE is the vocoder chip type, and has nothing to do with Motorola. The > > original Astro used a VSLEP vocoder chip, and is not supported by > > Motorola anymore. > > > > > Ahhh ... the wonderful world of acronyms!! > > > > > > James > > > > Boy, is THAT an understatement!!!! > > > > -- > > Jim Barbour > > WD8CHL > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > -- > Ham Radio Spoken Here.....NU5D > Nickel Under Five Dollars >
