[hpsdr] ADC Question

[n3ick at cox.net]

 I've tried many of the software packages currently available for SDR, one thing I have noticed as the sampling is increased the filtering flattens out reducing the ability to notch out a close in signal which I like to do when operating. In some other testing I have noticed audio quality seems to suffer when you try undersampling large sampling rates perhaps it was done incorrectly I'm not a hardware/software engineer.
Audo quality is one of the key areas for me and the best audio and audio fltering I have heard using HPSDR was when I was running GHPSDR3-Alex wirelessly on a Windows laptop, I was not able to get the transmit function working so I moved on. 

73
Keith

---- Simon HB9DRV <simon at hb9drv.ch> wrote: 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> I agree,
> 
> Any 'modern' SDR program must be able to handle whatever rate the hardware
> throws at it.
> 
> Simon Brown, HB9DRV
> http://sdr-radio.com http://dit-dit-dit.com
> 
> You are standing at the end of a road before a small brick building. Around
> you is a forest.
> A small stream flows out of the building and down a gully. The sunspot count
> is 285.
> 
> 
> -----Original Message-----
> From: hpsdr-bounces at lists.openhpsdr.org
> [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Alberto I2PHD
> Sent: 25 July 2012 12:09
> Cc: HPSDR list
> Subject: Re: [hpsdr] ADC Question
> 
> I can well understand the limitations imposed by PowerSDR that does not
> accept arbitrary
> data rates, but VAC does not enter into the picture.
> 
> Between the DDC and the VAC there is the SDR program on the PC, and it is
> this program
> that does the fractional resampling between, for example, the 158.730 kHz of
> the SDR-IQ
> of RFspace and the 96 kHz sent to the VAC. Both the old Winrad and the new
> Studio 1
> can do this.
> 
> -- 
> /*73 Alberto I2PHD*/
> 
> 
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/


 1343324029.0