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Station Class Codes

Definitions listed where appropriate, following each code with
For example, FBT means Temporary Base.

T  ~  Temporary
I  ~  Itinerant
S  ~  Standby
C  ~  Interconnect
J  ~  Temporary Interconnect
K  ~  Standby Interconnect
L  ~  Itinerant Interconnect
            
Code Description
FB Base
FB2 Mobile Relay
FB4 Community Repeater
FB6 Private Carrier (Profit)
FB7 Private Carrier (Nonprofit)
FX** Fixed
FX1* Control
FX2 Fixed Relay
FX3 Secondary Fixed Signaling
FXO Operational Fixed
LR Radiolocation Land
MO Mobile
MO3 Mobile/Vehicular Repeater
MO6 Private Carrier Mobile Operation (Profit)
MO7 Private Carrier Mobile Operation (Non-profit)
MR Radiolocation Mobile
WDX Radiolocation Weather Radar

* Station associated with a mobile relay that employs the same frequency as the associated mobile station for control purposes.
 
** Station operating on frequencies available for fixed use for control purposes in accordance with applicable rules.

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Effective Radiated Power (ERP)

The ERP is the transmitted output power times the net gain of the antenna system. This is the gain of the antenna minus the transmission losses, which include losses attributable to the transmission line, duplexers, cavity filters, and isolators.
 
The actual formula is:

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