Sexy Developer

    S-UNIT DISCUSSIONS Compiled From The Internet ORIGINALLY POSTED ON THE FINE WA4PGM SITE In article  Gordon Pritchard wrote: I've only heard of this 6dB/S-unit by way of *rumour*, too. I've followed this discussion for a bit, but don't know if anyone has mentioned it already.  The 6dB/S unit figure is covered in the 3B question pool.  It's never been clear to me which text is used as a refrence for any of the questions, but I presume (hope, actually) they are taken from some sort of reliable engineering text.  I think the pool needs a Bibliography! Jim --KE6JPO ___________________________________________________________________________ Greetings to All that read this from VE7TMA: The ARRL handbook refers to an old standard of  S9 calibrated at 50 microvolts RF input and 6 dB per S unit down from that reference point. The section also clarifies this by stating in reality there is seldom two rigs that follow the same absolute calibration curve co...

PSK31 Fundamentals Background: The PSK31 philosophy. PSK31 is the result of my belief that the present batch of "data" modes have left a gap in amateur radio operating, the gap that was previously filled by AMTOR or even traditional RTTY, in which two or more operators chat to each other on an open channel. Modes such as packet radio, Pactor, and others, are highly complex, are unsuited to multiway conversations, and in particular, the long block lengths introduce an unacceptable delay in the processing of text such that even normal conversation is unpleasant and quick-break question/answer sessions are impossible. The move to automated unattended message forwarding has left a gap in the person-to-person communication field, and PSK31 is an attempt to remedy this situation with a simple but efficient code structure coupled with the narrowest possible bandwidth, and with only enough error-correction to match typical typing-error rates, and with no time-consuming synchronisatio...