Code F1

Type - Timeout counter exceeded maximum count.
Cause - Cable disconnected or no FSK data carrier.
Display - NC after any keyboard entry.
Tuning - Authorized barker channel only.
Action - Refresh converter to restore service. Send security transaction to clear F1 code.

Code F2

Type - Powerup counter exceeded maximum count.
Cause - Power disconnected too many times.
Display - Normal.
Tuning - Authorized barker channel only.
Action - Refresh converter to restore service. Send security transaction to clear F2 code.

Code F7

Type - Phase locked loop tampering.
Cause - Phase locked loop tampering has been detected. Invalid tuning parameters loaded in NVM.
Display - Normal
Tuning - Dependant on tamper condition.
Action - Look for signs of physical tampering. F7 code will stop when tampering stops.

Code F8

Type - Disconnect.
Cause - Converter turned off by disconnect transaction.
Display - Normal.
Tuning - Disconnect barker only.
Action - Refresh converter to restore service. F8 code is cleared automatically.