[hpsdr] Alex multi RX config

[Georg Prinz]

Hi Joe,

thank you for your quick reply.  I thought, for 3 mercury and 1
penelope, I need 3 RX Alex boards and 1 TX Alex board, only. Now,
according your note, I need 3 RX and 3 TX boards, even if there is 1 Tx,
only. Do you agree?

73, Georg dl2kp





Am Dienstag, den 22.11.2011, 10:22 -0700 schrieb Joe Martin K5SO:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi Georg,
> 
> No, there's nothing special about using Alex filters with two Mercury  
> (RX) boards and one Penelope (TX) board.
> 
> The Alex T/R relay on each TX Alex board provides protection for each  
> Mercury board when in TX mode;  you need two Alex TX/RX filter sets if  
> you run two Mercury boards and want bandpass filtering (i.e., HPF and  
> LPF both), each Mercury is connected to its own Alex TX/RX filter set.
> 
> No additional relays are needed if you have at least the TX  (LPF)  
> filter, as that's where the T/R relay is located; refer to the Alex  
> manual for clarification.
> 
> Independent control of the the Tx and Rx antennas used (ant1, ant2, or  
> ant3 for TX and RX) is provided in PowerSDR via  the Setup > Alex  
> Antenna Ctrl menu (select Alex as being present on the Setup >  
> Hardware Config menu to be able to see the Alex control menu).   These  
> menus are shown in the Alex user manual.  The configuration settings  
> for Alex are very flexible and versatile, refer to the Alex user manual.
> 
> 73,  Joe K5SO
> 
> 
> On Nov 22, 2011, at 9:06 AM, Georg Prinz wrote:
> 
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > Hi,
> >
> > for not to reinvent the wheel:
> >
> > does any speciality exist which shall be considered when building a
> > multi board receiver (2 or more mercury boards) with one TX Penelope
> > board? How did you manage the RX/TX swith over? Are there additional
> > relais necessary? Is there a posibility to choose the TX antenna out  
> > of
> > the RX antennas by software?
> >
> > 73, Georg, dl2kp
> >
> >
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