[USRP-users] Re: Asynchronous IO in RFNOC on x310

2024-11-07 Thread Martin Braun
Hey Mark, OK, I get it, you're basically sampling a GPIO pin instead of using the analog data. And of course, you have to stick to the sampling theorem if you want to do that, and you're seeing what happens if you violate it. I'm guessing it's important that you run at a clock that's related to y

[USRP-users] Re: PS-USB usage on x440

2024-11-07 Thread Dario Pennisi
Hi, more info... i see from device tree that usb0 (fe20) is ok and the other usb (fe30) is disabled. for usb0 i see the following: /sys/kernel/debug/usb/fe20.usb/mode is device and /sys/kernel/debug/usb/fe20.usb/link_state is Disconnected even if the cable is connected and detect

[USRP-users] Re: First 10 Samples From First Receive Always 0

2024-11-07 Thread Marcus D. Leech
On 07/11/2024 15:46, Chris Wozny wrote: Thank you! The sample delay induced by the filter taps makes sense. Is there a best practice that folks go with to deal with this or is it so insignificant that people don't care? I was thinking of either requesting 10 more samples and skipping the first

[USRP-users] First 10 Samples From First Receive Always 0

2024-11-07 Thread Chris Wozny
I had noticed that the first ten samples of my application were always coming up as zero regardless of whether it was 8-bits on host or 16-bits on host. I went down the path of trying to reproduce a minimal example to share with this mailing list, however I then realized that even the example "rx_t

[USRP-users] Re: First 10 Samples From First Receive Always 0

2024-11-07 Thread Marcus D. Leech
On 07/11/2024 14:53, Chris Wozny wrote: I had noticed that the first ten samples of my application were always coming up as zero regardless of whether it was 8-bits on host or 16-bits on host. I went down the path of trying to reproduce a minimal example to share with this mailing list, however

[USRP-users] Re: First 10 Samples From First Receive Always 0

2024-11-07 Thread Chris Wozny
Thank you! The sample delay induced by the filter taps makes sense. Is there a best practice that folks go with to deal with this or is it so insignificant that people don't care? I was thinking of either requesting 10 more samples and skipping the first 10 when writing to the filesystem / reading

[USRP-users] PS-USB usage on x440

2024-11-07 Thread Dario Pennisi
Hi, i'm trying to use ps-USB port as a NCM interface to an external and i think i correctly added the required stuff but i see a major issue that is present also when not adding the related modifications: 1) issuing lsusb shows nothing 2) regardless of the modifications the host PC shows failure to

[USRP-users] Re: How do I mitigate LO signal in my transmission?

2024-11-07 Thread Ron Economos via USRP-users
Yup, that's some good advice. Here's a B210 with the TX gain set to 60. The first plot is with the peak IQ levels around +/- 0.62. The second plot is with the peak IQ levels around +/- 0.83. The LO leakage stays the same, but you get a few dB more signal. I have a little utility block that pr