Specifications

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Electronically Rotatable Receive Antenna System
Phased receive-only antenna systems are used to create a directional pattern which can
peak desired signals and remove interfering signals. Variable phase nulling allows an
operator to improve reception by electronically reducing a stronger interfering signal
arriving from a di erent direction. It also can dramitically reduce noise.
This system includes two Active Receiving Vertical Antennas and the DXE-NCC-1 Receive
Antenna Variable Phasing Unit. It combines the two verticals to produce a steerable
directional array.
The system improves your reception of weak DX by:
• Combining two omni-directional antennas to produce an adjustable directional pattern
• Reducing overload from a strong signal in a di erent direction
• Reducing interference from distant signals or noise in a di erent direction
• Nulling directional strong signals to hear weak stations on the same frequency
Features
• Vertical antenna elements only 102" long
• Ideal for Amateur Radio or Shortwave listening
• Antenna elements are grounded when power is turned o
• Use with DXE-TVSU-1A sequencer for best protection before transmitting
NCC-1 Phasing Unit Specifications
• Usable Frequency Range: 300 kHz to 30 MHz
• Optimum Performance Range: 500 kHz to 15 MHz
• Third Order Output Intercept: +32 dBm each input, +38 dBm both inputs combined
• Gain Flatness: +/- 1 dB over complete phase rotation
• Gain: Adjustable from 0 dB to -40 dB
• Available Phase Rotation: >360 degrees between 500 kHz and 15 MHz
• Power: NCC-1 +13 Vdc nominal @ 1A minimum (2A recommended)
• Antenna Port Power: 10-30 Vdc @ 300 mA maximum, TX muting available
DXE-AAPS3-1P Active Antenna Phasing System......................................$1,099.95
Receive Antenna
Variable Phasing
Controller & Noise Canceller
Allows control of signal level and
phasing of two receive antennas—
see specifications below. It is available
separately for those who want to design
their own variable receive antenna system.
DXE-NCC-1 Receive Antenna Variable Phasing Controller .................. $599.95
See NCC-1 specifications below.
Noise Cancelling Signal Enhancers
Made to combat strong sources of RFI, either from other stations or unusual noise,
these enhancers help boost the signals you want while attenuating the signals you
don’t. More powerful than a basic noise blanker, the enhancers can negate or cancel
all types of noise and interference. They both cover 1.8 to 30 MHz with 290 degrees of
phasing; the deluxe version adds an attachable indoor whip. For all the details,
visit DXEngineering.com.
MFJ-1025 Noise Cancelling Signal Enhancer .....................................$169.95
MFJ-1026 Deluxe Noise Cancelling Signal Enhancer ......................... $189.95
Phase two receive antennas at proper spacing.
For optimal results, use identical antennas.
Typical Installation
for DX Engineering NCC-1
This diagram shows the DX Engineering NCC-1 in a station with a single
transceiver that has a separate receive antenna port. The two active receive
antennas are shown deployed in the recommended position. The DX Engineering
RPA-1 Preamplifier is normally not needed as most of today’s transceivers have
built-in preamps to compensate for overall lower signal levels obtained from small
receive-only antennas. What is most important is the NCC-1’s ability to improve
the overall signal-to-noise ratio and null out interference from other directions.
The diagram shows the transceiver keying line set up to allow the NCC-1 to shut
o the power to the DXE Active Receive Antennas, which have an internal relay which
grounds the antenna for protection from TX RF.
The DX Engineering NCC-1 can be used with many receiving antenna combinations
including Single and Reversible Beverages, Receive Four-Square Arrays, K9AY
Loops, and more. It will increase the directivity of any properly spaced combination
of two similar antennas as long as the signal levels are within the range of the
balancing controls.
Desired Directions
Noise Source
Antennas: Receiving
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