Best fixes were to run the signal on the digital bus rather than analog. If analog, filter and wire shield. Twist wires from multi-phase sensors such as synchros.
If analogue - also good practice to avoid close parallel cable runs, especially if unscreened cables (if feasible) - preferably crossing analogue cables at or near right angles - ensuring correct cable shield grounding (often from source end only) - utilising star grounding & running twisted cables tight to common grounded areas where possible - use of ferrite to dump RF (see the bulge in your PC monitor cable)