Borderlands 3 (BL3) has 9 Signal to Noise Locations (Probes) in Psycho Krieg and the Fantastic Fustercluck DLC. They count as Crew Challenges (Collectibles) and are needed for the Fustercluck Off trophy or achievement.
None of Signal to Noise Probes are missable! You can still get all of them after the story in free roam. To see how many you found, press L3 / Left Stick on the world map and D-Pad Right to open the “Challenges” tab. On the world map, the ones you haven’t found are marked by a green symbol and the ones you found have a blue (slightly transparent) icon. You can pursue them in any order you like with any character you want. They are usually located in areas slightly off the main path. If you get close, a radio call will from Tannis will trigger, indicating their nearby location.
How Signal to Noise Probes work
If you approach and interact with the collectibles, they will emit several waves with glowing orbs. You need to shoot those orbs within a time limit to complete the Collectible.
It will likely take several tries for each of them. Remember the locations of where the orbs travel, as the waves themselves vanish over time, making the orbs harder to spot!
Some of them cannot be hit from where you start – so you have to walk or jump platforms to be able to shoot them!
As for your weapon of choice – take something with good accuracy and aim, as well as a decent magazine size. You don’t want to waste time reloading.
There are three maps with three Probes each. They will be listed in the logical order below (which deviates from in-game-numbering in Sapphire’s Run).
3 Signal to Noise Probes – Castle Crimson
3 Signal to Noise Probes – Sapphire’s Run
These are scattered quite a bit. Zoom out on your map to get the full picture. Map transitions are as follows:
This secluded area has no Fast-Travel-Station, so you have to continue past the Third Probe and use the Teleport-Node floating in the air.
3 Signal to Noise Probes – Benediction of Pain
These are all 9 Probes for the Signal to Noise Challenge in Borderlands 3 Psycho Krieg DLC.
For all other Collectibles and Crew Challenges check out our full Borderlands 3 Wiki & Strategy Guide.