I have a frustrating problem that is bugging the heck out of me. I have dual MGL Voyager G2's and 1 x MGL Xtreme.
At random intervals I will loose my GPS signal to each EFIS, not simultaneously but all get affected. The New Zealand agent is assisting me but we have not solved it yet. I have relocated the GPS antennae away from each other. We have shortened the GPS coax cable to eliminate induced interference and correctly re-terminated the coax, there are no loops or crossovers in each of the 3 GPS cables.
We suspect it is interference but where? Have installed a ferrite bead on each of the GPS's coax . All cabling where low level signals are carried are all shielded (one end only).
Any ideas of where to look and what instrumentation to use to track this down. I have a laptop scope in house.
Plane is wired on Bob Knuckells principles (Aero Electric Connection) and apart from the fact that I have a lot it is still pretty standard.
There is nothing consistent when the GPS's become available or not available, some-days it has been perfect others like today they all just came and went at random intervals.
This is a real propeller head problem, I would certainly appreciate any thoughts from other electron jockeys.
Cheers Peter
Peter Armstrong
Auckland, New Zealand
At random intervals I will loose my GPS signal to each EFIS, not simultaneously but all get affected. The New Zealand agent is assisting me but we have not solved it yet. I have relocated the GPS antennae away from each other. We have shortened the GPS coax cable to eliminate induced interference and correctly re-terminated the coax, there are no loops or crossovers in each of the 3 GPS cables.
We suspect it is interference but where? Have installed a ferrite bead on each of the GPS's coax . All cabling where low level signals are carried are all shielded (one end only).
Any ideas of where to look and what instrumentation to use to track this down. I have a laptop scope in house.
Plane is wired on Bob Knuckells principles (Aero Electric Connection) and apart from the fact that I have a lot it is still pretty standard.
There is nothing consistent when the GPS's become available or not available, some-days it has been perfect others like today they all just came and went at random intervals.
This is a real propeller head problem, I would certainly appreciate any thoughts from other electron jockeys.
Cheers Peter
Peter Armstrong
Auckland, New Zealand