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5.2 FEATURES OF THE SMX100 AMPLIFIER
The SMX100 amplifier is intended for applications requiring high gain and power output to 100
Watts, over a wide range of frequencies, without tuning adjustments. The SMX100 amplifies an
input signal source over the frequency range from 10 kHz to 1000 MHz and at a minimum gain of
50dB dB.
The SMX100 is an integrated system with band switching capability for the frequency range required
for operation. With the SMX100 in Low Band (BAND 1) mode of operation, the input RF signal is
directed by RF Relays to the Band 1 PA and Driver section which in then to the output. With the
SMX100 in the High Band ( BAND 2 ) mode of operation, the input signal is directed by RF Relays
to the Band 2 PA and Driver section which in then to the output. Both bands utilize only one input
and output connector with the signal routed internally by RF Relays. Refer to Figure 7.0, SMX100
Schematic Diagram for an illustration of the SMX100 circuitry.
FIGURE 7.0
SMX100 SCHEMATIC DIAGRAM
5.2.1 Preamplifier or Optional Preamplifier/Attenuator
The SMX100 amplifier has a preamplifier with approximately 10dB gain; which is powered from an
independent low voltage power supply.
If the amplifier is equipped with the Optional Preamplifier/Attenuator, it provides the amplifier with
remote level control and leveling capability over the entire operating frequency range. With the front
panel level control set at maximum output it has a nominal 4 dB gain and can be adjusted with the
front panel level control over a greater than 30 dB range.
