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Re: [Discuss-gnuradio] UHD Calibration


From: Josh Blum
Subject: Re: [Discuss-gnuradio] UHD Calibration
Date: Tue, 13 Dec 2011 09:55:14 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111124 Thunderbird/8.0


On 12/13/2011 09:17 AM, Evan Merewether wrote:
> I would like to say that I just received a new N210 and am very happy with
> the quality and performance of the device.  I have started to familiarize
> myself with the included utilities and have run the uhd_cal_* routines.
> 
>  
> 

Thanks!

> My question is does repeated runs of the calibration increase the
> performance? For example, does running the sequence uhd_cal_tx_iq_ballance,
> uhd_cal_tx_dc_offset, uhd_cal_tx_iq_ballance, uhd_cal_tx_dc_offset produce
> better calibration than just the sequence uhd_cal_tx_iq_ballance,
> uhd_cal_tx_dc_offset?
> 
>  

I guess the idea is that the transmit calibration is somehow more
accurate after receive has been calibrated. Thats possible, but I
haven't observed it in practice. If I had to make a recommendation, I
would say to run the RX IQ cal first.

-Josh



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