R.V.R. Elettronica PJ1000M-C, Руководство пользователя

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PJ2000M-C, PJ2500M-C & PJ3000M-C
38 / 40 User Manual Rev. 1.5 - 09/10/09
module, total current and average voltage.
8.3.4 Low-Pass Filter
This filter is located at the back of the equipment.
The task of the low-pass filter is to reduce the harmonic emissions of the amplifier
to below the levels allowed by standards.
8.3.5 Directional Coupler
The task of these two cards that seem identical is to supply the power measurement.
They are installed on the input RF connector on the inside of the machine. One
card supplies the amplifier’s forward power whereas the other one supplies the
reflected power.
8.3.6 Control Board
The control board acts as an auxiliary card for the PROTF card in the PS section
should the latter fail to trip due to a malfunction. It implements all the functions
associated with measurements, protection, control and communications and is
even capable of detecting the individual voltages or currents inside the machine,
in addition to the overall ones.
If pre-arranged, this Board can carry the signals to the DB9 connector located on
the machine’s back panel in RS485 standard.
8.3.7 LEDs Board
This card is fitted with 4 warning LEDs that indicate the machine’s general operating
status.
It also has a trimmer for adjusting power (AGC control). Use a small screwdriver
to change the delivered power.