[USRP-users] Re: examples using N310 with ext LO

2022-11-04 Thread Marcus D. Leech
On 04/11/2022 16:21, Kenneth Burchfield wrote: Rob / Marcus, The initial-5GHz LO was my problem.  I was not providing it at startup.  Thank you guys for the info.  The mirroring is resolved! -Scott That's excellent! On Thu, Nov 3, 2022 at 8:48 AM Marcus D. Leech wrote: On 03/11/2

[USRP-users] Re: examples using N310 with ext LO

2022-11-04 Thread Kenneth Burchfield
Rob / Marcus, The initial-5GHz LO was my problem. I was not providing it at startup. Thank you guys for the info. The mirroring is resolved! -Scott On Thu, Nov 3, 2022 at 8:48 AM Marcus D. Leech wrote: > On 03/11/2022 09:36, Rob Kossler wrote: > > When running N310 with external LO, the devi

[USRP-users] Re: examples using N310 with ext LO

2022-11-03 Thread Marcus D. Leech
On 03/11/2022 09:36, Rob Kossler wrote: When running N310 with external LO, the device will automatically try to run a calibration at device startup (actually in the software make N310 device) where it expects the external LO to be at 5 GHz.  If you supply an LO at a different frequency, this c

[USRP-users] Re: examples using N310 with ext LO

2022-11-03 Thread Rob Kossler
When running N310 with external LO, the device will automatically try to run a calibration at device startup (actually in the software make N310 device) where it expects the external LO to be at 5 GHz. If you supply an LO at a different frequency, this calibration will be ruined. Is it possible th

[USRP-users] Re: examples using N310 with ext LO

2022-11-02 Thread Marcus D. Leech
On 02/11/2022 15:53, Kenneth Burchfield wrote: Marcus, I agree.  Is there a way to tune the sideband suppression so that I can attenuate more of the mirrored signal? With the internal lo, everything seems to just work.  Are there extra configuration steps that I need to take to adjust for the e

[USRP-users] Re: examples using N310 with ext LO

2022-11-02 Thread Kenneth Burchfield
Marcus, I agree. Is there a way to tune the sideband suppression so that I can attenuate more of the mirrored signal? With the internal lo, everything seems to just work. Are there extra configuration steps that I need to take to adjust for the external lo? Thanks, Scott On Wed, Nov 2, 2022 at

[USRP-users] Re: examples using N310 with ext LO

2022-11-02 Thread Marcus D. Leech
On 02/11/2022 15:27, Kenneth Burchfield wrote: Marcus, The sidebands do not change with the LO level. I am basically running the tx_waveforms example from UHD 4.2.0.0, and I am adding the argument tx_lo_source=external. Attached is a picture of the spectrum. I am generating a SINE with wave-

[USRP-users] Re: examples using N310 with ext LO

2022-11-02 Thread Marcus D. Leech
On 02/11/2022 12:09, Scott Burchfield wrote: Hi, Are there any updates on this problem.  I normally try not to reply to old threads, but I am seeing the same the same spectral mirroring Rob described earlier.  My setup is also the same as Rob’s. I have tracked some newer threads that mentio

[USRP-users] Re: examples using N310 with ext LO

2022-11-02 Thread Scott Burchfield
Hi, Are there any updates on this problem. I normally try not to reply to old threads, but I am seeing the same the same spectral mirroring Rob described earlier. My setup is also the same as Rob's. I have tracked some newer threads that mentioned disabling TX_QEC_INIT, but I am still seeing