![Image](https://i.imgur.com/Mi91VmV.jpg)
I've tried the first three so far, here are average spectra saved from my code. Oddly I'm still getting the center dc spike, despite using mir_sdr_DCoffsetIQimbalanceControl(1, 1):
![Image](https://i.imgur.com/Jfg7N3t.png)
![Image](https://i.imgur.com/gkH53yX.png)
![Image](https://i.imgur.com/4AwkOWj.png)
I would like to use the third mode, but I'm confused by the spike on the right. What is causing it? I see the same low if spike in HDSDR, which I believe uses the same v2 api via extio:
![Image](https://i.imgur.com/yewfLZZ.jpg)
Oddly, it doesn't have any DC spike. I'm not sure if they're doing any extra tricks to eliminate the spike, such as subtracting the average I/Q from each sample.
In SDRUno, I'm not given as much control over the low if modes. I can only select "IF MODE: LIF", but not the sample rate which is fixed to 2 MSPS. I'm assuming this comes from the new V3 API which I have not yet explored.
So I guess I have two questions. Should I switch to the V3 API to get cleaner low IF mode output, and are there any other tricks for avoiding or eliminating DC offset?