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B210 10 MHz GPSDO leakage into Rx

AW
Andy Walls
Sat, Sep 12, 2015 12:48 PM

Hi,

I have a USB3 B210 with the GPSDO installed.

When I run uhd_fft using an VERT2450 on TX/RX port, with a high enough
sample rate, I see two well defined tones at +/-10 MHz from the center
frequency.  When I touch the GPSDO can with my finger, the received
power from the tones goes up a few dB.

I guess this proves that the GPSDO 10 MHz is being picked up by the B210
RF frontend somehow (and that I'm an antenna).

Aside from the obvious RF shielding, is there a way to mitigate some of
this leakage by configuring the B210 a certain way?

Has anyone else noticed this?

Does anyone know if the 10 MHz leaks out on transmit as well?

I'm using UHD_003.008.004-0-g93011c14.

Thanks.

-Andy

Hi, I have a USB3 B210 with the GPSDO installed. When I run uhd_fft using an VERT2450 on TX/RX port, with a high enough sample rate, I see two well defined tones at +/-10 MHz from the center frequency. When I touch the GPSDO can with my finger, the received power from the tones goes up a few dB. I guess this proves that the GPSDO 10 MHz is being picked up by the B210 RF frontend somehow (and that I'm an antenna). Aside from the obvious RF shielding, is there a way to mitigate some of this leakage by configuring the B210 a certain way? Has anyone else noticed this? Does anyone know if the 10 MHz leaks out on transmit as well? I'm using UHD_003.008.004-0-g93011c14. Thanks. -Andy