Analog hardware abstraction layer faults, Fault_ahal_invalid_freq – 500h, Cause – ThingMagic Micro Hardware User Manual
Page 86: Solution, Fault_ahal_channel_occupied – 501h, Fault_ahal_transmitter_on – 502h, Fault_antenna_not_connected – 503h

Analog Hardware Abstraction Layer Faults
A D I V I S I O N O F T R I M B L E
Appendix A: Error Messages
81
Analog Hardware Abstraction Layer Faults
FAULT_AHAL_INVALID_FREQ – 500h
Cause
A command was received to set a frequency outside the specified range.
Solution
Check the values you are trying to set and be sure that they fall within the range of the set
region of operation.
FAULT_AHAL_CHANNEL_OCCUPIED – 501h
Cause
With LBT enabled an attempt was made to set the frequency to an occupied channel.
Solution
Try a different channel. If supported by the region of operation turn LBT off.
FAULT_AHAL_TRANSMITTER_ON – 502h
Cause
Checking antenna status while CW is on is not allowed.
Solution
Do not perform antenna checking when CW is turned on.
FAULT_ANTENNA_NOT_CONNECTED – 503h
Cause
An attempt was made to transmit on an antenna which did not pass the antenna detection
when antenna detection was turned on.