Yes, the signal should be at +3dBm, the Vrms is ~300mV into a 50 ohm load. The frequency of the signal is also twice the frequency of the signal I'm trying to gather data on. However, due to the way the documentation is phrased, I wasn't sure if 20MHz is too low of a frequency for the LO RX IN.
I have not tried the init_cals=basic argument. I can give that a shot and report back. -Chris On Thu, Nov 19, 2020, 12:32 PM Marcus D Leech <patchvonbr...@gmail.com> wrote: > Are you inputting an LO signal at twice the desired frequency and at +3dBm? > > Have you tried adding init_cals=BASIC to your device ages? > > Sent from my iPhone > > > On Nov 19, 2020, at 2:26 PM, Christopher Flood via USRP-users < > usrp-users@lists.ettus.com> wrote: > > > > > > Hi all, > > > > I've seen some discussion about this on the email lists, but I'm still > having a bit of trouble. I'm trying to use the LO IN RX ports on the front > of the N310 to synchronize the oscillators on the two daughterboards. I was > thinking I could generate a signal on one of the TX/RX ports of the SDR and > feed that into the LO IN RX ports at the appropriate frequency and power. > However, when I test this setup in GNU Radio Companion I don't get any > meaningful data, so I must be doing something wrong. > > > > The input signal that I want to sample is a 10MHz signal that is going > into an RX2 port on the front end of the SDR. When I set the device > argument "rx_lo_source=internal" and run it, the data I get looks exactly > how I would expect. When I change the device argument to > "rx_lo_source=external" and run it, I don't get anything that makes sense. > > > > Am I using the LO IN RX ports correctly? The documentation doesn't say > much besides power and frequency ranges. > > > > Any help or advice would be much appreciated. > > > > -Chris > > _______________________________________________ > > USRP-users mailing list > > USRP-users@lists.ettus.com > > > http://secure-web.cisco.com/1rpFFtn1JZDE_g214Q-YS6vXmf7iX-GrSqz5_gIRlzT74BRG0LQVcDxlbCKOBLjxI7GcMNxycsBFMF-Lzacu4VXZpGTxpMgLHyxfkdQ2pzOtNNtecm_gMTYICiRaahesVZWF5a2dj7cjYzaLEjuC4PUBV2IKiJN9B3Z0EGCGPr6nbTyCm-I7dJfEsfYsSIFdFFSQP6iWj2NrE4xYBVKyPCxJT34HfnXS_KoENsd6WDKRct0TsItd4_dk4xBZEWrwNqes0pfV_RJzJFNSWC1tJjpFk1UVK8ySaM22YoapPkrKhJ7xvd9EiKc-aK5WHC2syeWL5YAO5QNCrMxT9JJ-i3tvC2sZAlgAyNSx78qV7M09bkZ1k2hn5qi3jbvK3xggz-HHgjahAsx6zRH86NZDIoSe5_4tc6c0UeE03mYMgALuwY1kwoZr7b8-EjaFkvZRoF8mCGzGXTKfyvJuFHID1yA/http%3A%2F%2Flists.ettus.com%2Fmailman%2Flistinfo%2Fusrp-users_lists.ettus.com > >
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