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User Manual
Rev. 3.0 - 21/03/18
PJ5000U-K
IIC
I
2
C address setting. The I
2
C network address becomes significant when
the exciter is connected in an RVR transmission system that uses this
protocol. Do not change it unless strictly required.
5.3.6 Version Menu (Vrs)
This screen holds machine version/release information:
Menu 9
Note that these are readings, rather than settings, and cannot be edited (note the
empty arrow).
Rel
Firmware release information.
Dat
Release date.
Tab
Shows table loaded in the memory.
5.4 Protection System
Protection System
The protection system implemented inside the amplifier is based on two types of
intervention.
The first reaction is called “Foldback” and consists in decreasing the voltage in
the power amplifier when the forward or reflected power exceeds the proportional
limit voltage value. As such, the amplifier’s gain is reduced and the overall result is
an action that opposes the increase of the forward or reflected power. The yellow
LED on the front panel indicates the tripping of the foldback circuit..
The second type of reaction consists in turning OFF the equipment’s amplifying
section when a specific variable exceeds a set value..
Depending on the type of event that has occurred, after that the amplifier has
been turned off, it will be reactivated after a fixed time interval or only after that
the sharing which caused the block has been removed..
When the protection system trips due to a “cyclic” type parameter, a counter
begins counting up (the X value in the alarm menu). If the counter reaches the max
admissible cycle value (Y), the amplifier turns OFF definitely and the red “FAULT”
LED lights up on the front panel..
