Re: [Discuss-gnuradio] Trondeau C++ daughterboard code

[Stefan Brüns]

On Monday 06 October 2008 18:02:29 Per Zetterberg wrote:
> Dear All,
>
> I am trying to migrate from home-made daughterboard code to the code by
> Trondeau. I am using the version 9305. I use  db_flexrf_1800_tx_mimo_b.
> After changing "d_common->R_DIV(1)" to "d_common->R_DIV(16)" the signal is
> showing up on my spectrum analyzer at the correct frequency. However, the
> amplitude is about 25dB weaker than when using the home-made daughterboard
> code. I am using the daughterboard code as given by the code fragment
> below. Does anyone have an idea what could be wrong ?

The DB code sets the gain in the 9862 to the wrong value (there is something 
wrong with the calculation of the register value from the gain in db) - this 
may be fixed in the cppdb feature branch.

Stefan

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