User's Manual

AT71-250 Transmitter Owner’s Manual
© Linear Industries, Inc. All Rights Reserved 33/38
Below is the block diagram of the drawer.
MOD 4782: RF Driver, +24Vdc.
The RF Driver is a UHF broadband amplifier. (See the technical specs below). It is assembled in an
aluminum basis that is silver finishing and firmly attached to the air cooled heat sink. The RF driver
printed circuit board and the mechanical base of the transistors are welded on the same aluminum
base plate. This arrangement insures the excellent heat transfer performance and RF grounding at
the same time.
The set of assembled components constitutes the kit CIM 3754. This set is composed by 2 stages of
amplifiers on the UHF band. The first stage is composed by two transistors named PD57006, connect
on quadrature topology. The second stage is also composed by two transistors named
MRFE6S9060N also connected in quadrature.
This module has built in a circuit for reading the temperature. The reading is sent to the control
circuitry via software.