Credit deserved I’d just like to give a shout out to Burlbark (a member on this board) for providing me with some invaluable tips and advice in helping me resolve a very annoying GPS loss issue. Burlbark runs a drone repair business and I read his regular updates on his Facebook page (search for USdronerepair). He seems quite enthusiastic about this area of work, and is a regular contributor on this board. Over the past few weeks we’ve been exchanging some rather long chat sessions, which he freely offered as I’m in Australia and don’t really want to ship a drone across to the US, so I’m giving him a shout out here. Background My issue was loss of GPS lock when recording video. Having no GPS lock isn’t the end of the world as I prefer to shoot video while in ATTI mode. However if the Phantom is unable to obtain at least 6 satellites while shooting video, in the event of loss of communication to the controller, this would result in automatic landing due to insufficient number of satellites received (as auto-home cannot work). That is unacceptable! I own two Phantom 2 Vision+ (the original v2 units), both units are affected by a well-known loss of GPS lock when recording video. I’ve installed additional GPS antenna shielding, ferrite chokes, shielding of the GPS cable. All of this had some small measure of improvement but I was still losing at least 3 satellites, which is pretty critical because I may only receive 6-7 satellites in some areas. I’ve spent several weekends experimenting with grounding the shielding, installing more shielding, ordering 3M EMI-specific shielding tape. All of this didn't resolve my issue, I was losing 3-5 satellites when recording video, and gaining them back when I stop recording video. As I couldn’t measure what frequency, power and exact source of the EMI (I know it is likely the gimbal/camera assembly), it was like grasping at straws. GPS cable contact issue - possible issue? Well after several weeks of futile effort, I came across a post by Burlbark on the increasing the tension on the GPS cable’s side contacts. This involves removing the plug, then carefully bending the two side contacts on each pin (of the 4-pin cable), then reinstalling the plug. This increases pressure of the GPS pins when the plug is inserted onto the Phantom’s motherboard and makes better contact. Result of testing Based on some preliminary testing after five 15 mins flights today and recording video throughout, I saw loss of between zero and one GPS satellite while video recording. This is much better than 3-5 satellites loss than I normally encounter. I’m not calling it a success quite yet, as I want to do another 10 flights in various conditions and solar Kp index environments before I can make a more confident conclusion. Conclusion Thanks to Burlbark for all his help thus far, much appreciated as I would have never guessed that the GPS cable contact on the main board would be the issue when recording video. This issue does throw up a number of questions: 1. Assuming that it was poor contact of the GPS plug on the main board; what is the mechanism for RF coupling to occur between the camera and the GPS receiver and why is the effect is more pronounced when video recording is activated? 2. I’m curious to see what the RF spectrum looks like coming from the camera unit. Burlbark has posted an RF plot before, but I’d like to know which parts are noisy and the effect of video recording. 3. How much care did DJI put into EMC compliance when they designed this thing? The Phantom 2 Vision+ (ver 3) has additional shielding and ferrites installed shortly after the community made the discovery on this board. Seems to me their solution was not borne out of detailed engineering analysis but perhaps a quick-fix? I want tools that deliver capability, not toys.