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From: | Matt Ettus |
Subject: | Re: [Discuss-gnuradio] phase noise of RFX900 daughter board |
Date: | Mon, 10 Feb 2014 14:37:56 -0800 |
Hi,We have tried to measure the phase noise of RFX900 daughter board when the daughter board is mounted on a USRP 1 mother board. When we directly connect the TX/RX port to the RX2 port through a 46dB attenuation signal, we still observe significant amount of phase noise as shown in the attached figures. Those figures suggest that the phase noise is about 8 degrees which cannot be tolerated by many communication systems. Would be great if you guys can provide some suggestions on reducing the phase of the USRP platform.
Pengyu
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