Tracking: 2x Base Station 2.0 (Channels 7 & 8) + Index Controllers
The Issue:
Headset tracking is solid. Both controllers jitter/drift, especially near the floor. Occurs with both Pimax internal radios AND external SteamVR dongles.
What I have already ruled out (The “Nuclear” List):
Reflections: Covered TV, Glass PC Case, Monitors, Posters, and Plastic Floor Mat with blankets. Drift persists.
USB/PC Issues:
Updated BIOS to latest (AGESA update for USB stability).
Disabled HAGS in Windows.
Moved Headset to dedicated USB 3.0 (Blue/Red) port.
Moved Dongles to USB 2.0 extension cradles away from PC.
Power: Isolated Base Stations and Headset power to separate wall outlets (off the PC surge protector).
Interference: Unplugged Wi-Fi Router, Wireless Mouse, and Keyboard.
Base Stations: Verified lasers are firing (phone camera check), tried single-station tracking (drift happens with either station solo).
Current Status:
Playable but jittery. Suspecting environmental RF noise or a specific Pimax config issue. Any ideas?
Thanks for the suggestion. I wanted to clarify the goal of this test before I try it:
My understanding (based on Valve’s documentation) is that Valve Index Controllers do not support tracking data over USB—plugging them in only provides power/charging, but they still transmit position data wirelessly via the Watchman receivers.
When you ask if ‘drifting still occurs’ while connected via USB-C, are you implying that:
The charging/power from the USB connection might stabilize the internal components?
Or is there a specific way/setting to force wired data transmission for Index controllers that bypasses the wireless radios entirely?
If they are still using the wireless radios even when plugged in, I assume the drift would persist if the root cause is RF interference. I just want to make sure I understand the test procedure correctly!
Once the headset’s tracking mode is switched to Lighthouse, the controllers should pair automatically if they’ve been paired before. If so, try unpairing them first.
After that, connect the controller to your PC using a USB-C cable (the charging port), then press the power button. The controller should pair successfully, and you’ll be able to use it.