[hpsdr] ADC Question

[Keith]

HI Simon,

  I will be very interested in seeing your RBW tuning window for me looking at large amounts of spectrum would be IBU. Do you think you will be able to keep the filters in the tuning window sharp?  An example would be working a DX split seeing the DX station and seeing the last station calling the DX station  in the spectrum click of the calling stations frequency and making the contact. Works very well currently.

Thanks,
73
Keith

-----Original Message-----
From: Simon HB9DRV [mailto:simon at hb9drv.ch] 
Sent: Thursday, July 26, 2012 12:53 PM
To: n3ick at cox.net; 'HPSDR list'
Subject: RE: [hpsdr] ADC Question

Ah,

You're referring to RBW (Resolution BandWidth). I'll post a screenshot in a few weeks - it's always important to have a nigh high-res zoom / tuning window.

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: n3ick at cox.net [mailto: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. 


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