The console is great and my favorite SDR software. I have a few questions,
Question 1
LimeSDR, set RX Ant=NONE: There are 3 spikes on the spectrum: 415.314MHz, 435.000MHz, and 454.686MHz. It looks like 435.000MHz is like a DC spike. The other two are mirror images on both sides of the DC spike, 435.000+-19.686MHz?
Can software remove DC spikes? Can the mirror image on the edge be eliminated?
Question 2
My computer is a 2019 MacBook pro16". When it is running, the CPU usage is high, the fan runs fast, and the computer system becomes slower. Can the software reduce the resource usage?
Looking forward to your answer, thank you!
Timmy
LimeSDR DC spikes and CPU usage
Re: LimeSDR DC spikes and CPU usage
Unfortunately,
it seems that software authors don't care about users' problems.
it seems that software authors don't care about users' problems.
Re: LimeSDR DC spikes and CPU usage
Bit harsh.
Maybe he is out enjoying the warm sunshine, a commodity all too often lacking in Britain...
Maybe he is out enjoying the warm sunshine, a commodity all too often lacking in Britain...
Jim, Bournemouth IO90BR
Re: LimeSDR DC spikes and CPU usage
Um, Timmy, you do not have a problem in the part of the loop that runs from the keyboard through the computer up to the eyeball. If you exercise said eyeball and look towards the lower left if your picture it shows your bandwidth is 61.44 MHz. It's more or less astonishing that the CPU load is that small. Reduce the bandwidth if you want lower CPU usage. You also do not seem to have a GPU helping reduce your CPU load. That, too, would help.
{o.o}
{o.o}
Re: LimeSDR DC spikes and CPU usage
For further explanation I believe the FFT is a computation that requires roughly speaking a constant times the square of the number of FFT bins. So you'd be using about 1/40th the amount of CPU grinding out the full bandwidth of an AirSpy R2 spectrum.
I also believe the latest SDRC may have an option that turns the FFT bin count and computations per second down automatically on small computers. You can also use display options to reduce CPU usage.
{^_^}
I also believe the latest SDRC may have an option that turns the FFT bin count and computations per second down automatically on small computers. You can also use display options to reduce CPU usage.
{^_^}
Re: LimeSDR DC spikes and CPU usage
Thanks - it was late and I was not sure. N log N corresponds with more reasonable numbers for his 61 MHz vs the usual usage for 10 Msps on a laptop.
{^_^}
{^_^}