On Jan 1, 2008 9:23 PM, kh6ty <[EMAIL PROTECTED]> wrote: > > > > > > > The NBEMS development team is pleased to announce the availability of a > Windows NBEMS software suite for beta testing. > > The NarrowBand Emergency Messaging System (NBEMS) for Windows is a suite of > software programs designed for point-to-point, fast, error-free, emergency > messaging up to or over 100 miles distant, and takes up a very minimum of > space on the ham bands, leaving more space for all other ham activites. > > The system is designed primarily for use on the two-meter band, or on HF > with NVIS antennas, where there is a minimum of fading (QSB) to slow down > message transfers. Two meters has the advantage that distances long enough > to span disaster areas of up to 100 miles can be dependably covered with > small, portable antennas. In hilly regions, if two meters is not workable > over the distances required, NVIS antennas on HF can be employed instead, > but are not nearly as portable. > > The system uses the computer soundcard as the modem and, other than a > simple > interface connection between the computer and transceiver, no additional > hardware is needed. > > Composing and sending emergency messages on NBEMS utilizes the same Outlook > Express, Outlook, or Windows Mail, email program used for Internet email, > and is no more difficult than sending an email over the Internet. Messages > just go over the radio instead, when the Internet, phone service, or > repeater system is not locally reachable in an emergency. > > PSK63, PSK125, or PSK250 is used to modulate either two-meter SSB, or HF > SSB > transmitters, using horizontally polarized antennas for greatest range. Two > meters is unique in that the propagation is more constant than on the lower > bands from 6 meters on down, range is greater, and absorption less, than on > the lowest UHF band, 70 cm, so much wider modes, that handle QSB by > continuing to work far below the noise level, are not needed. > > This point-to-point system does not utilize repeaters, or email robots, for > message forwarding. All forwarding is always done by stations manned by > live > operators on both ends, who can comfirm that a frequency is clear locally, > negotiate a QSY if necessary to avoid causing interference, and confirm > delivery of a message by the intended recipient. The system depends upon a > multitude of radio amateurs providing the traditional public service > function, similar to the way they always have, and gives more hams a chance > to help out with emergency communications without requiring a large > hardware > investment. > > The software can also be used for daily casual communications on PSK31, > PSK63, RTTY, or MFSK16 and is capable of sending flawless, high resolution, > passport photo-sized color images, in less than 10 minutes over any path > that can sustain PSK250 without excessive repeats. > > All the members on this digitalradio reflector are invited to participate > in > the beta test of the NBEMS. The NBEMS suite can be downloaded for beta > testing from: http://w1hkj.com/NBEMS/ . > > Please give the system a try and send comments and bug reports to > [EMAIL PROTECTED] > > Happy New Year to you all! > > The NBEMS Development Team > > Skip, KH6TY > Dave, W1HKJ > >
-- Andy K3UK www.obriensweb.com (QSL via N2RJ) Grea
