MGL Avionics User Forum

I should clarify- the txponder status window on the EFIS!

iEFIS to TT21 via trig interface module.
The Transponder status window is displaying E RN--
What does this indicate?

There can be some offset variation in readings- obvious down at the bottom end of the pressure range, but insignificant at operating pressure The critical thing is indication at operating pressure- you will soon establish what the normal indication is/should be, and just look for changes from 'norma...

Pull-up resistor switched off?

Thanks for the time and info- that is the same setup as my customer. I have asked him to check on the interface status LED to confirm if it is talking to both the EFIS and the txponder- no confirmation yet. If that checks out it leaves the software version in the transponder, as I did note a comment...

I will check what I entered on mine next time I'm at the aircraft but my iEFIS Explorer Lite works well with my TT21 and has done from day one. Thanks. The customer has not yet given me the desired code and the octal he entered, so there is still the possibility he got it wrong. Though I would have...

Another issue re the EFIS/TT2x compatibility- I have a customer reporting below re not being able to load the ICAO code via an iEFIS Lite. The EFIS expects octal code input, the Trig expects hexadecimal, and somewhere in the middle things are not getting translated and/or transferred. The issue is n...

iEFIS Lite, TN72, TT21 TN72 connected to Lite RS232 port 2 RX (V16 on RS232 port 1) TT21 via Trig interface on CAN bus EFIS configured for GPS: External NMEA 9600 and Transponder: Mode-S on CAN bus. The system is partially working, but some anomalies to sort out that I can't find in the documenation...

Replace the CR2032 backup battery in the instrument.
Then use the setup menu to reset Hobbs time.
The manual will tell you how- you can download from the mglavionics.co.za website.

Following up on my original post on this thread re the AP in a Glasair 3....we are very close to a satisfactory solution, just some more tweaking to fine tune it over a series of flights. Ther were two major problems- servos slipping/AP disengaging, and erratic pitch and roll control when engaged- p...