If you get SIL, SDA and NIC errors on your PAPR it is likely that the GRT is not set up properly.
Make sure these values are entered in the GRT under General settings/TT22/echoUAT:
GRT EFIS TT22/EchoUAT Settings:
DU-SF Communication (Status) Verify “Yes”
SF-echoUAT Communication Verify “OK”
Remote Status Verify “OK”
External GPS Communication Verify “Yes”
Squat Switch Set to “None”
Aircraft Category Set as required, such as “Light Fixed Wing”
Speed Category Set as Required
Aircraft Width (m) Set as required in meters (divide wingspan in feet by 3 to enter as meters)
Aircraft Length (m) Set as required in meters (divide length in feet by 3 to enter as meters)
VFR ID Set to airplane N-number
GPS Input* Compliant TMAP GPS/TIS Rate Does not apply to EchoUAT
GPS Certification Level A or B
TEST Squitters Not used
TIS Output Not used
UAT/978 Receiver in Aircraft Set to “Yes”
1090-ES Receiver in Aircraft Set to “Yes”
GPS Antenna Offset: Linear (m) Set to distance antenna is from nose of airplane in meters (feet divided by 3).
GPS Antenna Offset: Lateral (m) Set to distance antenna is from centerline airplane in meters (feet divided by 3)
GPS NACv <10
Mode Verify “On”
Last Reply Count Reading does not matter
GPS Position Should show position if valid GPS position available
Transponder Versions Reading does not matter
Adapter Software Version Reading does not matter
*These settings are required to allow the EchoUAT to transmit your data*