<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div>PowerSDR v1.19.3.1.diversity11 (K5SO 31OCT2010) is available for download at </div><div><br></div><div><a href="http://www.k5so.com/HPSDR_downloads.html">http://www.k5so.com/HPSDR_downloads.html</a></div><div><br></div><div>This version implements the "radar screen" style diversity control used in the Flex 5000 in its diversity mode. In this present HPSDR release, diversity mode is no longer "constant gain" but instead the operator may independently adjust the relative gain and phase of the dual IQ data streams from the Mercury boards by dragging the yellow dot across the radar screen display. The slider phasing control has been removed; replaced by the large radar screen control. </div><div><br></div><div>The phasing performance is enhanced relative to earlier HPSDR releases. The operator has options to select "Mercury 1 only" or "Mercury 2 only" or "Diversity". </div><div><br></div><div>To see how this relatively large diversity control is used and what it looks like generally see the W9OY demo of a similar control that is used for the Flex5000 at </div><div><br></div><div><span style="color: rgb(31, 73, 125); "> </span><a href="http://www.youtube.com/watch?v=SD0V2D5S1dU&feature=player_embedded" style="color: blue; text-decoration: underline; ">http://www.youtube.com/watch?v=SD0V2D5S1dU&feature=player_embedded#</a></div><div><br></div><div>In the present HPSDR version it is not necessary to select "Enable" or "Sync" as these buttons are presently unnecessary and have even been temporarily removed from the control for the time being. "Sync" will be useful in later versions, after frequency diversity is implemented for the HPSDR. </div><div><br></div><div>This latest version is suitable for "spatial diversity" in which two spatially separated antennas are connected to the Mercury boards or "polarization diversity" in which the two Mercury inputs are connected to antennas of different polarization angles. Both Mercury boards operate at the same frequency. </div><div><br></div><div>I intend to begin work on a version that also includes "frequency diversity" so that the Mercury boards may be operated on different bands if desired. In this case the "extra" RX2 controls that you see at the bottom of the screen in the video clip will also show up on our HPSDR display. Those controls are not necessary if the Mercury boards are operating on the same frequency so are not shown in this latest HPSDR version.</div><div><br></div><div>73, Joe K5SO</div><div><br></div></body></html>