- 3 -
Additional Requirements
Please note you will need to consider the following requirements (parts not included in this
package) to install and operate the RPA-2 HF Preamplifier:
The RPA-2 requires a well-filtered, negative ground, +13.8 to +18 Vdc @140 mA power source.
Depending on the supply current, you should use an inline fuse. Alternatively, powering the RPA-2
through the coax feedline requires a voltage injector circuit (not included) and an internal jumper
(HD5) change. See the section “
Powering Through the Coaxial Cable
”.
Installation outdoors at the antenna is not normally needed or recommended. However, some antenna
types such as Pennants, Flags or K9AY Loops require a preamplifier at the antenna.
If you are
mounting the unit outdoors, you will also need to mount the RPA-2 in such a manner as to prevent
moisture entering the unit.
Specifications
of the
DXE-RPA-2
Receive Preamplifier:
Input and Output Connectors, female
: BNC and F
Frequency Range
: 300 kHz to 35 MHz
Gain
: 16 dB, +/- 1.5 dB (over entire frequency range)
Output Third Order Intercept
: 43 dBm
Noise Figure
: 3.5 dB
One dB Compression Point
: +26 dBm (400 mW output)
Dynamic Range, IM3
: 110 dB or greater (500 kHz BW)
Power Requirement
: +13.8 to +18 Vdc, 140 mA max.
Operating Temperature Range
: -10°F (-23°C) to 150°F (65°C), non-condensing
The following are simplified explanations of information highlighted above.
Third Order Intercept
-
A
standard measure of how well a
receiving system performs in
the presence of strong nearby
signals. The higher the third
order intercept (TOI), the less
likely adjacent strong signals
will cause interference. The
RPA-2 offers substantially
improved TOI over competitive
preamplifiers and
communication receivers. The
figure to the right illustrates a
typical RPA-2 output third
order intercept measurement.
The RPA-2 is significantly more immune to overload than the best commercial amateur
receivers. Third order products are 50 dB below +18 dBm output.
