[hpsdr] Mercury sampling rate

[Chuck Hutton]

Thanks, Phil... But as I am interested in the archive-able bandwidth, the
A/D sampling rate doesn't matter so much and neither does the display-able
bandwidth you mention. What rate will be saveable to disc? Will the user be
able to vary that rate? And also, what can be done with the archived data?
Is there current or planned support for playback of the files?

 

 

Chuck

 

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From: Phil Harman [mailto:phil at pharman.org] 
Sent: Friday, April 11, 2008 5:48 PM
To: Chuck Hutton; hpsdr at lists.hpsdr.org
Subject: Re: [hpsdr] Mercury sampling rate

 

Hi Chuck,

 

We sample at 122.88MHz since that divides evenly to standard sound card
frequencies.  This does need updating since we will be able to achieve 2MHz
of displayed bandwidth using the current USB2 interface to the PC.

 

73's Phil...VK6APH 

----- Original Message ----- 

From: Chuck Hutton <mailto:charlesh3 at msn.com>  

To: hpsdr at lists.hpsdr.org 

Sent: Saturday, April 12, 2008 3:51 AM

Subject: [hpsdr] Mercury sampling rate

 

***** High Performance Software Defined Radio Discussion List *****


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The Mercury page at http://hpsdr.org/mercury.html says:

"the board will contain it's own FPGA to undertake Digital Down Conversion
(DDC) to 250 kSPS or less for transfer over the Atlas bus to the USB
interface on the OZY board."
 
 
Earlier, I thought that the sampling rate goal was going to be much higher
to allow the host PC to archive wider chucks of bandwidth like an entire
ham, SW or AM (broadcast) band.
 
Is this just an old piece of information that needs correction? If so, what
is the real target?

 
Chuck


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