-----Original Message----- From: Marcus Müller Sent: Friday, June 10, 2022 10:47 AM To: usrp-users@lists.ettus.com; White, Joshua J <jjwhite@RiversideResearch.org> Subject: Re: [USRP-users] Test Hi Joshua, got it. By the way, you can see how people responded, in our mail archive! https://lists.ettus.com/empathy/search?

Leech Sent: Monday, October 24, 2022 2:18 PM To: White, Joshua J RiversideResearch.org> <jjwhite@RiversideResearch.org>; usrp-users@lists.ettus.com Subject: Re: [USRP-users] Re: MPM compat number mismatch error with E312 On 2022-10-24 14:14,

From: U L Sent: Tuesday, June 28, 2022 7:56 PM To: Fabien PELLET Cc: usrp-users ; undefined ; White, Joshua J <jjwhite@RiversideResearch.org> Subject: Re: GNU Radio Companion N310 GPIO Sink/Source block Joshua, Generally Fabien is right.

With regards Saurav Roy ________________________________ From: White, Joshua J <jjwhite@RiversideResearch.org> Sent: Friday, July 29, 2022 7:13 PM To: Saurav Roy ; usrp-users@lists.ettus.com Subject: RE: [USRP-users] Re: UHD Python API on windows External Email

Internal is to the SDR’s on-board TCXO, while external pulls the clock from the external clock in port on the rear of the device. Unless I am mistaken, to use the GPSDO, you must set the clock source and time source to “gpsdo”. That’s the way it works on the N310, at least, so I suspect it’s similar for the X310. Very respectfully, Joshua White Precision Timing Systems Engineer Engineering & Support Solutions Directorate www.riversideresearch.org T: 937.986.3153 | F: 937.431.3811 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain proprietary, confidential or privileged information or otherwise be protected by law. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please notify the sender and destroy all copies and the original message. From: Struyf Amélia via USRP-users Sent: Friday, May 6, 2022 7:42 AM To: usrp-users@lists.ettus.com Subject: [USRP-users] USRP X310 with GPSDO : clock source parameter CAUTION: This email is from outside of Riverside Research. Be careful when clicking links or opening attachments unless you know the content is safe. Dear all, I’m using USRPs X310 with integrated GPSDO. My goal is to compare the quality of different types of local oscillators but I’m confused with the clock reference source parameter. When the clock reference source is specified as “internal“ will my reference be the internal TCXO or the GPSDO? Similarly, when the clock source is specified as “external“ which of these two clocks will be the reference? Thank you for your answer, Amélia

(Cross-posted on usrp-users and discuss-gnuradio) For anyone who's familiar with using the USRP3 (specifically the N310) with GNU Radio: I'm trying to create a flowgraph in gnu radio companion that incorporates reading a value from one pin on the front panel GPIO of the N310 and writing a value to another pin. I'm looking for a source/sink block for GNU Radio companion that can accomplish this. Has anyone done this previously, or can anyone point me in the right direction? I have very little experience with GNU Radio and have no expertise in programming OOT modules. Thank you for any help you can provide. Very respectfully, Joshua White Precision Timing Systems Engineer Engineering & Support Solutions Directorate www.riversideresearch.org T: 937.986.3153 | F: 937.431.3811 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain proprietary, confidential or privileged information or otherwise be protected by law. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please notify the sender and destroy all copies and the original message.

Hello, Apologies if this question is too basic, but I have not been able to find a definitive answer in the N310 documentation. Is it possible to stream data or signals to or from the USRP using the GPIO ports, or is it only useful for status and triggering? Specifically, is it possible to use the GPIO to stream an arbitrary waveform to the N310, digitize it, and then modulate and transmit it? Conversely, is it possible to receive a signal, demodulate and stream it to the GPIO? Very respectfully, Joshua White Precision Timing Systems Engineer Engineering & Support Solutions Directorate www.riversideresearch.org T: 937.986.3153 | F: 937.431.3811 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain proprietary, confidential or privileged information or otherwise be protected by law. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please notify the sender and destroy all copies and the original message.

I received your mail through the mailing list Very respectfully, Joshua White Precision Timing Systems Engineer Engineering & Support Solutions Directorate www.riversideresearch.org T: 937.986.3153 | F: 937.431.3811 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain proprietary, confidential or privileged information or otherwise be protected by law. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please notify the sender and destroy all copies and the original message. From: Milo H Fields III Sent: Monday, April 17, 2023 5:44 PM To: usrp-users@lists.ettus.com Subject: [USRP-users] Test CAUTION: This email is from outside of Riverside Research. Be careful when clicking links or opening attachments unless you know the content is safe. Just checking if my signed emails are getting blocked.

The underflows you're getting mean your host PC isn't providing samples fast enough for the rate the radio is consuming them and it's underrunning the TX buffer. Likely there isn't enough bandwidth between the host PC and the radio to support 100 Msps. There is a pretty good discussion of bandwidth and sampling rates here: https://kb.ettus.com/About_USRP_Bandwidths_and_Sampling_Rates Very respectfully, Joshua White Precision Timing Systems Engineer Engineering & Support Solutions Directorate www.riversideresearch.org T: 937.986.3153 | F: 937.431.3811 This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain proprietary, confidential or privileged information or otherwise be protected by law. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please notify the sender and destroy all copies and the original message. From: yguruprasad@umass.edu Sent: Wednesday, March 6, 2024 1:56 PM To: usrp-users@lists.ettus.com Subject: [USRP-users] X310 CAUTION: This email is from outside of Riverside Research. Be careful when clicking links or opening attachments unless you know the content is safe. Could some help me if this is working as expected? ./bin/txrx_loopback_to_file --tx-args addr=192.168.10.2 --rx-args addr=192.168.10.2 --tx-rate 100e6 --rx-rate 6.5e6 --tx-freq 20e6 --rx-freq 18e6 Creating the transmit usrp device with: addr=192.168.10.2... [INFO] [UHD] linux; GNU C++ version 8.5.0 20210514 (Red Hat 8.5.0-20); Boost_106600; UHD_4.2.0.1-0-g321295fb [INFO] [X300] X300 initialization sequence... [INFO] [X300] Maximum frame size: 1472 bytes. [INFO] [GPS] Found an internal GPSDO: LC_XO, Firmware Rev 1.101 [INFO] [X300] Radio 1x clock: 200 MHz [INFO] [0/KeepOneInN#0] Setting default MTU forward policy. Creating the receive usrp device with: addr=192.168.10.2... Using TX Device: Single USRP: Device: X-Series Device Mboard 0: X310 RX Channel: 0 RX DSP: 0 RX Dboard: A RX Subdev: BasicRX (0) RX Channel: 1 RX DSP: 1 RX Dboard: A RX Subdev: BasicRX (1) RX Channel: 2 RX DSP: 2 RX Dboard: B RX Subdev: Unknown (0xffff) - 0 TX Channel: 0 TX DSP: 0 TX Dboard: A TX Subdev: BasicTX (0) TX Channel: 1 TX DSP: 1 TX Dboard: B TX Subdev: Unknown (0xffff) - 0 Using RX Device: Single USRP: Device: X-Series Device Mboard 0: X310 RX Channel: 0 RX DSP: 0 RX Dboard: A RX Subdev: BasicRX (0) RX Channel: 1 RX DSP: 1 RX Dboard: A RX Subdev: BasicRX (1) RX Channel: 2 RX DSP: 2 RX Dboard: B RX Subdev: Unknown (0xffff) - 0 TX Channel: 0 TX DSP: 0 TX Dboard: A TX Subdev: BasicTX (0) TX Channel: 1 TX DSP: 1 TX Dboard: B TX Subdev: Unknown (0xffff) - 0 Setting TX Rate: 100.000000 Msps... Actual TX Rate: 100.000000 Msps... Setting RX Rate: 6.500000 Msps... [WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff. Select an even decimation to ensure that a halfband filter is enabled. Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands. decimation = dsp_rate/samp_rate -> 31 [WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff. Select an even decimation to ensure that a halfband filter is enabled. Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands. decimation = dsp_rate/samp_rate -> 31 [WARNING] [MULTI_USRP] Could not set RX rate to 6.500 MHz. Actual rate is 6.452 MHz [WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff. Select an even decimation to ensure that a halfband filter is enabled. Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands. decimation = dsp_rate/samp_rate -> 31 [WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff. Select an even decimation to ensure that a halfband filter is enabled. Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands. decimation = dsp_rate/samp_rate -> 31 [WARNING] [MULTI_USRP] Could not set RX rate to 6.500 MHz. Actual rate is 6.452 MHz [WARNING] [0/DDC#1] The requested decimation is odd; the user should expect passband CIC rolloff. Select an even decimation to ensure that a halfband filter is enabled. Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands. decimation = dsp_rate/samp_rate -> 31 [WARNING] [0/DDC#1] The requested decimation is odd; the user should expect passband CIC rolloff. Select an even decimation to ensure that a halfband filter is enabled. Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands. decimation = dsp_rate/samp_rate -> 31 [WARNING] [MULTI_USRP] Could not set RX rate to 6.500 MHz. Actual rate is 6.452 MHz Actual RX Rate: 6.451613 Msps... Setting TX Freq: 20.000000 MHz... Actual TX Freq: 20.000005 MHz... Setting RX Freq: 18.000000 MHz... Actual RX Freq: 17.999995 MHz... [WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping. Press Ctrl + C to stop streaming... Setting device timestamp to 0... 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