Re: [Discuss-gnuradio] RFX900 and automatic gain control

[Matt Ettus]

Harvind Samra wrote:
> Hi there,
>
> Does the RFX900 have an AGC algorithm that it automatically applies?  Or
> does the host machine have to implement an algorithm via the
> write_aux_dac command?
>
>   


As shipped, the RFX-series does gain control via software using the 
set_gain() command, which uses write_aux_dac at a lower level.  You 
don't need to call write_aux_dac directly.

On the 900, 1200, 1800, and 2400 you can set up the boards to do AGC 
automatically by analog means, but this requires moving around a couple 
of resistors.  The RFX400 does not have this capability.

Matt