R.V.R. Elettronica PJ300M, User Manual, Page: 16 / 34

PJ300M
10 / 28 User Manual Rev. 7.0 - 25/07/03
Link one of the Alarms/Interlock connectors to the Interlock connector of the exciter, if
available (as it is in RVR Elettronica’s exciters). If the exciter you are going to use
has no suitable interlock connector, it is advisable to use for its supply the plug called
“AC Line for exciter” on the rear panel of the amplifier. This plug is protected by a
relay that is opened under the same conditions that trigger the “interlock” circuit.
Connect the RF output to the antenna cable or to a dummy load with suitable power
rating.
Finally, connect a proper cable to the amplifier’s mains input plug.
ATTENTION: It is essential that the unit is properly earthed to ensure both the safety
of operaton as well as the correct working of the equipment.
5.2 Operation
Switch ON the amplifier and verify the green “ON” LED being it.
The analog instrument, joined with the rotating selector, is used to visualize the working
parameters of the unit (Fig. 5.2):
Figure 5.2
Rotating Selector Position Full Scale Value Visualization Line
I 10 A 1
V 50 V 2
FWD 500 W 3
RFL 50 W 4
Check on the analog instrument using the rotating selector if the internal supply voltage
(parameter “V”) is 50V. Check that the standby current (I) is approx 200 mA. These
values confirm that the power supply is correctly operating and that the quiescent
setting of the RF power module is all right.
Swith ON the exciter (set for minimum power) and wait for it to lock on the working
frequency. When the PLL locked, progressively increase the exciter’s ouput power,
while checking on the amplifier’s instrument its emitted power (FWD). Along with the
increase in the emitted power, one can notice a proportional increase in the drawn
current (I). Keep increasing the exciter output power until the amplifier reaches the
desired level, that is at most 300 W. At this point, the normal working values for the