The limiter operation is recognized as On when the
following conditions exist.
Output peak current limiter (positive) is operated.
Output peak current limiter (negative) is operated.
Output average current limiter is operated.
Output power limiter is operated.
The External Signal Input port is particularly
used for several output modes including
AC+DC-EXT, AC-EXT, AC+DC-ADD, AC-
ADD, AC+DC-Sync, AC-Sync and AC-VCA
Connect to the External Signal Input port on the
rear panel via a coaxial cable with a BNC
connector when using an external input signal as
the signal source with external synchronization.