Re: [Discuss-gnuradio] TX Gain parameter in uhd_siggen_gui

[Marcus D. Leech]

On 09/08/2014 11:13 PM, zealdeal wrote:
> Thanks for the info. Can anybody please confirm whether the step size limit
> of 0.5 dB is valid for USRP N200?
It's not the underlying motherboard, it's the daughter-cards.  I think 
all of WBX, SBX and CBX use a step attenuator with 0.5dB step size.

Others, I'm not sure about.

Generally, the "analog stuff" is on the daughtercards, and gain-setting 
is definitely "analog stuff".

If you need fine-grained control over output power, you can vary the 
magnitude of your baseband signals, where you have much-finer
  control available.  Although, I have to admit that, except for 
certain laboratory experiments, power-control beyond 0.5dB granularity
  is of very little use in any practical sense.




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