[AMRadio] SDR IQ

Brett Gazdzinski Brett.Gazdzinski at verizon.net
Tue Mar 30 19:46:41 EDT 2010

Depends on the laptop.
The Sony I have seems to run the audio stuff ok even with the power supply 
hooked up.
The downside is, the sound cards in laptops are usually low end, no line in 
and out, only mic and headphone jacks....


----- Original Message ----- 
From: "D. Chester" <k4kyv at charter.net>
To: <amradio at mailman.qth.net>
Sent: Tuesday, March 30, 2010 7:24 PM
Subject: Re: [AMRadio] SDR IQ

>> From: "Jay Bromley" <jayw5jay at cox.net>
>> For years I have used SpectraPlus.  They sure seem to be pricey these
>> days,
>> since I have purchased the software.  Here is the link:
>> http://www.spectraplus.com/  I guess 14 years or more has flown by since 
>> I
>> purchased mine?  Seems it was expensive then, but I can't remember how
>> much.
>> I am still using he original copy without any problems.  I have sure got
>> my
>> money worth out of it.  Works great, but a few times I have had ground
>> loops
>> throw me off until I figured out what was going on.  Computer power
>> supplies
>> are horrible in this regard.
> That one is a lot more expensive than the True Audio.
> I have had so much trouble with these problems, that I wouldn't even 
> attempt
> to cope with the ground loops and hum issues that would inevitably result
> from using any kind of audio test software with a computer with a.c. 
> supply.
> I have a laptop that is faster, has a bigger HDD and more memory than my
> regular computer has, so I would install the spectrum analyser in the 
> laptop
> and run it off battery-only when using the analyser.  It looks like that
> software could convert a laptop into a lab instrument that would be more
> expensive than the laptop itself if purchased in the form of a dedicated
> unit.
> Don k4kyv
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