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Re: [Discuss-gnuradio] Phase measurement with Ettus Research N210
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From: |
Sylvain Munaut |
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Subject: |
Re: [Discuss-gnuradio] Phase measurement with Ettus Research N210 |
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Date: |
Wed, 18 Jun 2014 00:36:35 +0200 |
Hi,
> To start I want to characterize the phase noise of the device, therefore
> I send to both the RX channel and to the frequency reference input the
> same 10 MHz signal. I configured the N210 for 200 kHz sampling and a
> carrier frequency of 10 MHz.
The LFTRX doesn't have a tuner so if you set a carrier freq of 10 MHz
the frequency shift is done by the FPGA via CORDIC and you'll have
numerical errors in there. You just can't get rid of them.
Cheers,
Sylvain