Skanti TRP 9250, Technical Manual, Page: 161 / 289

20 - 23: TU protection by TU hardware
PA Temp
Measurement: PA temperature too high.
PA/Temp Att = 1 and PA Att/PA Protect = 1.
Protection made: Output power decreased by 14 dB.
Display: Flash "Protec".
Possible cause: Air filter blocked.
PA SWR high
Measurement: PA SWR was too high.
Reflected power was detected.
PA Temp Att = 0 and PA Att PA Protect = 1.
Protection made: Output power decreased by 14 dB.
Display: Flash "Protec".
Possible cause: TU - ATU coaxial cable or antenna.
Note: It is necessary to select low power or to switch off
the equipment to reset the protection
High Average
Measurement: Average power reduced to 100W.
Possible cause: CW keyed for more than 1 minute.
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POWER PROTECTION SERVICE
TRP 9250 TECHNICAL MANUAL 5-11