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Re: [Discuss-gnuradio] interpolation and output level

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] interpolation and output level
Date: Fri, 18 Mar 2005 15:05:26 -0800
User-agent: Mutt/1.5.6i

On Fri, Mar 18, 2005 at 02:05:24PM -0800, Javs wrote:
> Hello ppl, 

> I understand that the interpolation factor changes the amplitudes of
> the signals. The default usrp_siggen.py works fine and I can admire
> 16mV and 100 K on the scope. But if I use the default intrp of 64 in
> the example usrp_siggen.py and try to change the amplitude levels
> using -a option, the signals still come down. Any guesses why ?

What value's are you trying with the -a option?
Keep them <= 16000.

> Also, When I first boot my USRP and try an example, it fails for the
> first time. For instance, I tried tx_check.py and i had a runtime
> error. However, it works fine the second time. Is this because, it
> takes its time to load firmware into the FX2 and the FPGA or am I
> missing something here ?

What's the error?

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