I have PAW Rosetta set up to provide GPS input via NMEA to Trig TT22 for Mode S Extended Squitter (with SIL/SDA at 0 as required). I have followed all the set up advice and instructions in Trig and PAW ( baud rates etc etc) and there seems to be communication between the two devices communicating. However when I look at the gps position shown on the Trig (by double pushing the Trig Fn button) it shows a Lat/Long GPS position but it is just not very accurate! It puts us about 1.5miles south of where we actually are! More weirdly, PAW is also linked to Skydemon and on the SD map, when selecting ‘use PilotAware’ under the ‘Go Flying’ tab then it shows the plane in exactly the correct position (and I assume this GPS position is coming from PAW and not the iPad)! I have used the recommended USB to RS232 converter cable from Farnell so I am mystified as to why the Trig does not appear to be receiving the correct gps position and presumably will then also use that same, slightly incorrect, gps position when it transmits in ADS-B ES out? I have therefore not been able to use my transponder lest it is transmitting incorrect gps data. Any ideas of what I can check or fix? Is there a screen in PAW where I can read the gps position it thinks it is at? Many thanks!