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Re: [Discuss-gnuradio] Difference in gain using gnuradio 3.1.3 and the

From: Johnathan Corgan
Subject: Re: [Discuss-gnuradio] Difference in gain using gnuradio 3.1.3 and the trunk (at least on RFX1800)
Date: Thu, 2 Apr 2009 11:28:04 -0700

On Wed, Apr 1, 2009 at 11:45 PM, Per Zetterberg
<address@hidden> wrote:

> I have connected a signal generator to my USRP and I am using a CW. Thus I
> have a constant input power. I am running the usrp_rx_cfile.py utility
> (exact command line below). If I run gnuradio 3.1.3 then the amplitude I see
> is 16dB higher than if compile from the trunk (checked  out a week ago or
> so). I think it has to do with the new daughterboard  code being different
> from the old python one. I am using an RFX1800 daughterboard.

In other words, the magnitude of the samples in the captured .dat
files are different by a factor of 16dB?  Do they otherwise look the
same spectrally?

> The signals are also conjugated with respect to each other

Conjugated, as in a+bi => a-bi , or as in a+bi => b+ai?


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