To process the signals, you need to upgrade "Processing level" first
The satellites to get hash from are written in daily task, and there is no daily task on first day.
To fix the satellites servers just sv.target them, go to them, and click 'E' on a broken server. It is written in the tutorial. Same for getting the hash codes, go to the satellite, enter sv.hash into console and write it into paper, for example:
Satellite hashcode report form sierra 186EFF2D34 romeo 12D91088F7 lima 115810CA29
Then just place it on a closed drive box and send on a drone
To set the polarity and frequency you need to hold 'E' and use mouse scroll to adjust filter speed, it doesn't allow you to just set it to a specific value. Also, filters are moving by themselves only in bad weather, you need to buy "Storm protection" module to avoid it
The game isn't supposed to be pixelated, it gets pixelated only if you set "Screen resolution" too low, and "Screen resolution" doesn't really affect the performance that much. To increase FPS, just set the "Shadows" to 2 or 1 and disable "Volumetric light"