User's Manual

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１１ P rotection Circuit
11-C Protection / Slight Fault
Crowbar
When the FET drain current and reflected power from antenna significantly exceed the limit, crowbar
circuit trips instantly to protect valuable FET finals, without waiting for the response from the
m
icroprocessor. It blanks the RF drive for 100ms. During this time period, microprocessor detects the
abnormal states to issue shut down command under “PROT CROWBER”.