[hpsdr] USB-protocol 1.27

[John Melton]

The system does not currently support multiple receivers on multiple
Mercury cards. If you have 2 Mercury cards you have to configure the
system for 2 receivers.

-- John g0orx/n6lyt

On Tue, 2011-01-25 at 14:50 +0100, wully wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi all
> 
> When looking at the USB protocol Version 1.27, there is the possibility 
> to get the IQ-data from up to 8 receivers.
> 
> Question: Using two mercury boards, each configured with *two* receivers 
> (version 6.3 fpga-design from k5so), what is the sequence of data:
> 
> first board, first rx
> second board, first rx
> first board, second rx
> second board, second rx
> 
> (This seems to be the case accoriding to my own experience).
> 
> Or is it both rx of first board and then both rx of second board?
> 
> It seems than more and more people are using multiple mercuries, 
> multiple penelopes.
> AFAIK, the protocol does not specify how multiple boards are treated. It 
> is also not clear to me, what happens, when I specify preAmp on/off with 
> two mercuries. My experience is, that both relais are switched 
> simultaneously.
> 
> comments are wellcome.
> 
> 73, HB9EPU
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