Specifications

Alpha 9500 HF Linear Amplifier Operating Manual Alpha Radio Products
Diagnosing Faults Product Release 1
DOCNUMBER 9500
Document Issue 1, Revision 7
Page 9–10 June 2009
99
9
Resolution
•
Reduce the drive or retune.
Fault code 16
Description Autotune failure.
Explanation The autotune algorithm has encountered a problem that causes it to go
through a large number of iterations without being able to find an
acceptable tune condition, and has been stopped.
Resolution
•
Reduce the drive and restart the auto-tune.
Fault code 17
Description Plate current too high with amplifier unkeyed.
Explanation When the amplifier is unkeyed, the plate current should be quite low.
Some failure conditions can cause the plate current to exceed a safe level
and produce this fault code.
Resolution 1. If the tube is shorted out, replace it.
2. Ensure that the HV circuit is functioning properly.
Fault code 18
Description Input power too high.
Explanation The input drive power from the exciter is greater than a preset threshold,
currently 100 W.
Resolution
•
Reduce the input power to within proper limits.