[hpsdr] Triple Mercury Directional Steering program

[Berndt Josef Wulf]

G'day,

does this version still work with 2 Mercury cards?

73, Berndt
VK5ABN

On Mon, 20 Jun 2011 12:41:44 Joe Martin K5SO wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> 
> PowerSDR v1.19.3.4.directional1 (K5SO 16JUN2011) is available for
> download from
> 
> http://www.k5so.com/HPSDR_downloads.html
> 
> This new Windows program is a modification of the W5WC PowerSDR
> program and implements three Mercury receiver boards simultaneously.
> The program provides a new user control to permit directional steering
> and deep nulling of stations.  The user has direction control of a
> three antenna array and phase/gain control of the two non-reference IQ
> data streams as well as user control over which Mercury receiver is to
> be used as the reference source.
> 
> All Mercury boards must be loaded with Mercury firmware v6.6 or later
> and Metis needs firmware v1.3 or later.   Presently Ozy/Magister are
> not supported in this program but will be supported and posted shortly.
> 
> Tests have shown that a gain of up to about 4.8 dB is possible over
> the single Mercury case in the desired direction by careful adjustment
> of the angle direction control phase controls of the non-reference IQ
> streams.  Theoretical max gain of a three Mercury system is 4.77 dB
> over a single Mercury system.  Independent gain control of the non-
> reference sources are included in the event that the gain of the three
> independent antenna feed systems are not quite equal.
> 
> Bench tests show nulls as great as 70 dB; however, on-air adjustments
> typically yield nulls in the 50 dB range or sometimes less depending
> upon the band conditions.
> 
> Of course, all three Mercury receivers must use a common 122.88 MHz
> clock and be phase locked to the 10 MHz Atlas bus line from Excalibur
> for optimum results.
> 
> The program will run with only a single Mercury installed but, of
> course, no directional control or nulling will be operational with
> only a single Mercury board present; in case you wish to preview the
> program to see how the user-interface of the program looks and how the
> controls move.  To my knowledge, Mercury firmware v6.6 is backward
> compatible with the existing HPSDR programs except that only a single
> receiver is implemented in each Mercury FPGA. This fact precludes
> operating multiple receivers from a single Mercury board if v6.6 is
> loaded in the Mercury FPGA; VFO A and VFO B operations are still
> functional, however.
> 
> Thanks, Joe K1RQG, for helping me test the program under challenging
> on-air conditions and for all the great feedback on design of the user-
> interface.  Additional comments and suggestions are welcome, of course.
> 
> 73,  Joe K5SO
> 
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-- 
-----------------------------------------------------------------------
Berndt Josef Wulf
P.O. Box 501
Nairne
SA 5252
Australia

ICQ: 18196098
URL: http://www.ping.net.au
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