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User Manual
Rev. 1.0 - 29/06/09
PJ2500M-C, PJ3000HE, PJ3500M-C,
PJ4000U-K & PJ5000U-K
2500 watts for
PJ2500M-C
model (keep in mind that due to the measurement
digitalization effect it might not be possible to obtain a reading of exactly 5 kW, 4
kW, 3.5 kW, 3 kW o 2.5kW, but a lightly higher or lower value which is perfectly
normal).
Note:
now the amplifier is adjusted to its rated output, but
the AGC function is
not checking the delivered power
. Any changes in the driving power or in the
environmental conditions could cause slight output power changes.
In order to operate the AGC, increase the driving power by about 10%
as compared to the value required to obtain the amplifier’s desired
output level (the amplifier’s output power will increase but this is not
a hazard for the amplifier thanks to its built-in protection system).
Now turn the multi-turn RF PWR ADJ trimmer on the RF module counterclockwise
and check on the display that the power delivered by the amplifier decreases until
the desired value is attained.
Should you need to use the amplifier at a power level lower than the rated one,
proceed as follows:
•
If back-off is temporary (for instance to run a test), reduce the output power
level of the exciter until power delivered from the amplifier reaches the desired
value.
•
If back-off is permanent (to set the station’s power at a level lower than the
maximum rated output), first disable the AGC by turning the RF PWR ADJ
trimmer clockwise all the way. Then reduce driving power until you attain an
amplifier output power value equivalent to the desired level plus approximately
10 %. Finally turn the trimmer counterclockwise until the delivered power
decreases to the required level.
Now all of the machine’s operating parameters may be checked via the software
control system.
As a rule, the machine does not need to be manned to work. If any alarm conditions
occur, they will be managed automatically by the protection system or notified to
the user by means of LEDs on the panel and messages on the display.
5.3 Software
This chapter describes the ways in which the microprocessor controls the amplifier
and how the user may interact with the software.
Questo capitolo descrive le modalità con cui il microprocessore controlla
l’amplificatore, e come l’utente può interagire con il software.
The figure in the follow shows the overall software user interface diagram.
Note:
the user may issue commands to the equipment only when in LOCAL mode
by means of the selector. Otherwise the user may only read the parameters and
not change them.
