[hpsdr] TS-B2000 vs Mercury

[Daniel Quigley]

Thanks for that useful tip Phil - I love advice like that.  For that recording the AGC-T was set at 101.  Following your tip, tonight, it is at 85-ish - so it is now "lower" than it was before.  On another note, a friend ran the two audio files through an analyzer and noted that Mercury was "flat" and the Kenwood was "notchy".  
 
Mercury rocks!
Dan



From: phil at pharman.orgTo: dquigley at msn.com; hpsdr at lists.hpsdr.orgSubject: Re: [hpsdr] TS-B2000 vs MercuryDate: Sun, 4 Jan 2009 12:55:34 +0900
Hi Dan,
 
Thanks for the recording and Mercury sure sounds nice. One suggestion, to my ear it sounds like you have the AGC threshold set too low. How I  normally run PowerSDR is to find a spot on the band where there is just noise and then increase the AGC-T control from a  low value until the band noise does not increase any more.  Back the control off just a little and that way the AGC is not acting on noise. 
 
I think there is a bug in the AGC code that I need to talk to Bob N4HY about since if you set the AGC-T control too high then weak signals actually distort. 
 
73's Phil...VK6APH 
 
 
 
 

----- Original Message ----- 
From: Daniel Quigley 
To: HPSDR Reflector 
Sent: Sunday, January 04, 2009 2:08 AM
Subject: [hpsdr] TS-B2000 vs Mercury
***** High Performance Software Defined Radio Discussion List *****





Hi Folks, Last night I did an A/B comparison between Mercury and a Kenwood TS-B2000.  The receivers used the exact same antenna/tuner chain and settings were the same:   Preamp:OFF Noise Blanker:ON TS-B2000 DSP Width: 0-5Kc HPSDR LSB Width : 0-5KcRxEQ: OFF (Flat) on both receivers Mercury is running V2.2  I didn't normalize for audio level differences but I'll let you judge the rest... HPSDR:http://alvargi.50megs.com/Camradio/hpsdr.mp3 TS-B2000http://alvargi.50megs.com/Camradio/hrd.mp3 



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