[hpsdr] Hermes - initial powerup

[Erik Anderson]

It does actually, thank you.  It sounds like the only way for receiver
software to know that something like this is happening is to have a list of
firmwares and its capabilities somewhere (I'm guessing the single-receiver
version branch is running its own version numbers or something, think I
remember reading that on the list).  Part of me is thinking that it might
be nice if there was (yet another) CC0 code listing the number of receivers
in the datastream, although this would likely be mooted if the only
receivers that supported it were multi-receiver.

73, Erik km2g

On Thu, Mar 29, 2012 at 5:08 PM, Joe Martin K5SO <k5so at valornet.com> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Erik,
>
> I didn't notice a response to your questions so I'll give them a go.
>
> As I recall, if multiple receivers are requested from Hermes v1.3 by a PC
> program Hermes will continue to output a data stream that IQ values in the
> stream that is appropriate for single receiver operation but the PC will be
> expecting "interleaved" IQ values from multiple receivers.  This will
> usually cause "distorted" noise to be heard in the audio output channels
> and/or a large central spike in the panadapter display with no discernable
> signals present in the display, unless of course the PC program does some
> kind of "firmware version checking" in which case the PC program will
> usually halt execution of the PC program as the expected firmware version
> number will not be received by the PC.
>
> No interleaved data streams of entirely zeroes will be produced by Hermes
> v1.3 when a PC program asks for multiple receivers.
>
> A multiple-receiver-compatible version of firmware for Hermes will be
> produced and released to replace Hermes v1.3 as soon as possible, I'm sure.
>
> I hope that answers your questions satisfactorily.
>
> 73,  Joe K5SO
>
>
> On Mar 29, 2012, at 2:32 PM, Erik Anderson wrote:
>
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > Any particular behavior to watch out for if multiple receivers are
> requested?  do they end up in the datastream as zeroes or does it just
> assume you requested only one receiver?
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20120329/5b8d8fd1/attachment-0004.htm>