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User Manual
Rev. 1.0 - 29/06/09
PJ2500M-C, PJ3000HE, PJ3500M-C,
PJ4000U-K & PJ5000U-K
In the analog display mode a small triangle indicates the reflected power level
set in the Alarm Threshold Setting Menu (RflWar), whereas the bar at the bottom
shows the instant reflected power level.
This type of display might be useful when a device to be tuned is connected to the
amplifier’s output such as a cavity.
5.3.7 Version Menu
This screenful shows the hardware version (H.V.) and the software version (S.V.)
of the equipment.
5.4 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 occurred, and after the amplifier has been turned
OFF, it will be reactivated after a set length of time or only after the sharing,
which caused the locking, has been cleared. In the alarm menu the first type of
configuration is indicated by
X - (Y)
, whereas the second one is indicated by
Wait
.
The third possibility is that the system does not trigger the protection conforming
to a specific parameter: this is indicated by
Dis
. (Disabled).
While the amplifier is OFF temporarily owing to an alarm, the yellow WAIT LED
lights up and the reason the protection was triggered is shown on the display.
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.
The user may press the ALARMS RESET key to interact with the protection system.
The effect differs depending on the machine’s status when the key is pressed:
