[hpsdr] HERMES schedule question

[Phil Harman]

Hi Alberto, 

That will not be a problem with Hermes since we have a much larger FPGA than on Mercury. In fact it should be possible with the current Mercury board.  Just need to try and find the time to experiment.

73's Phil... VK6APH

  ----- Original Message ----- 
  From: Alberto I2PHD 
  To: HPSDR (open) 
  Sent: Sunday, June 20, 2010 4:14 AM
  Subject: Re: [hpsdr] HERMES schedule question


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  On 6/19/2010 3:55 AM, Phil Harman wrote: 
    The receiver board (Mercury) incorporates a Digital Down Converter that takes the 1.966Gbps ADC data at 16 bits per sample and reduces it to 48/96/192ksps at 24 bits per sample.  This slower data is passed over the Atlas bus to either an Ozy board (USB interface to the PC) or shortly an OzyII  board (Gigabit Ethernet).

    Hermes does the same except the functions of Mercury and Ozy are combined on the one board.
  Will Hermes too be limited to 192 kHz max downsampled frequency, or there will be a provision for a more ample chunk of the spectrum
  available to the PC software ? This is one of the parameters that SWLs use to judge if a given SDR is suited to their tasks.
  What they like to do is to digitize the entire MW spectrum (1600 kHz), making a WAV recording of it, to then replay it leisurely.
  Presently only Perseus and the QS1r are capable of this.

  73  Alberto  I2PHD
   




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