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

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PJ2000M-C, PJ2500M-C & PJ3000M-C
39 / 40 User Manual Rev. 1.5 - 09/01/09
9. “Low-Drive Power” Option (/LD)
The figure shown the top view of RF section of the equipment with LD option. The
board comes described in the continuation of this chapter.
Figure 9-1: “Low-Drive power” Board
9.1
“Low-Drive power” Board
The “Low-Drive power” board contains an RF amplifier with only one stage that, with
a power of about 1W, can supply an output power of approximately 30W suitable
to pilot PJ2000M-C and PJ2500M-C , with a total gain of approximately 15dB.
The active device utilized in the amplifier modules is a Mosfet (BLF177) and
uses for the feeding the same voltage of 50V
DC
used from the eight RF amplifiers
modules.
On the output stage of this board is present a directional coupler that measure the
reflected and forward power; the latest comes acquired from the control software
that represents it legible like input power.
The board is mounted on the fin that supplies to its cooling through forced
ventilation.