Thanks to all who responded to my questions about noise limiters. There
seems to be overwhelming support for the MFJ-1025/1026 over the Timewave
ANC-4 so I guess my mind has been made up :)
73 to all and good DXing,
I got this from DX Eng.
Bob k3DJC
Thank you for the inquiry.
Following the completion of engineering and production reviews of the new
phasing control unit, DX Engineering is progressing toward a late fall
release of the DXE-NCC-1. It will offer superior functionality
previously
unavailable on the Amateur Radio Market.
The following is a detailed description of the DXE-NCC-1 including what
it
can and cannot do for your station.
The DX Engineering high performance Noise Canceling Controller will phase
two RECEIVING antennas together in order to cancel interference and
increase
signal-to-noise ratio.
The NCC-1 provides very flat gain across the complete phase rotation,
typically +/- 1 dB. The frequency range of the NCC-1 is 300 kHz to 30
MHz.
Phase rotation of greater than 360 degrees with no gaps is available
below
30 MHz. Output third order intercept is +32 dBm each channel and +38 dBm
combined, 45 dB better than the nearest competitor.
Benefits:
- +32 dBm output third order intercept on each antenna port to handle
strong signals without overload.
- 30 dB of fixed attenuation in 10 dB steps for each antenna plus 15 dB
of
variable attenuation enables the signals to have balanced gain for
maximum
control of phase.
- Can power and phase the DX Engineering Active Vertical or Active Dipole
Antennas through the feedline connections.
The DXE-NCC-1 unit will accept 75 ohm F connection from two antennas.
Both
antennas need to be the same polarization for maximum benefit. The NCC-1
will allow "the steering" of nulling or peaking of noise sources, strong
interfering signals or weak desired signals. The DXE-NCC-1 is receive
only;
it will not connect the transceiver to the transmit antenna.
See the DX Engineering website for more information about the Active
Receive
antennas, which are designed to mate to the Noise Canceling Phasing
Controller, for exceptional results.
This new product and DX Engineering's approach to receiving are different
than what most of the hams have been forced to use in the past.
Typically, at contesting or DXing stations, receive antennas are
available
regardless of transmit antenna connections or conditions. The DXE-NCC-1
is
designed to be connected to two remote receiving antennas, such as one
beverage and one active vertical, or two passive or active vertical or
horizontal antennas, to optimize the nulling of noise or strong signals
or
the peaking of weak signals, and to dramatically improve the signal to
noise
performance of your station.
All DX Engineering receiving systems are designed for direct connection
to a
receive input on your amateur transceiver. So, whether it is a beverage
antenna, a phased array of Active Receive Antennas, or the Receive Four
Square, the only interruption of received signals is in the transmitting
transceiver. That way, any other radios are free to receive on other
frequencies or bands.
The DXE-NCC-1 has no connection to your transmit antenna, unless you
build
your own T-R relay system to accomplish receive phasing between your
transmit antenna and another antenna that should have the same
polarization.
That T-R system will introduce loss and noise, which is counterproductive
to
the pursuit of a lower noise floor and maximum signal to noise ratio.
However, DX Engineering is considering the production of a high quality
T-R
relay in the future, so the ham that does not have a transceiver with a
separate receiver input will be able to realize superior performance with
our high quality receive antenna systems.
The output of the DXE-NCC-1, or any DX Engineering receive antenna
system,
can be split to the receive inputs of two transceivers by using our
Two-port
Splitter/Combiner, DXE-RCS-2. The DXE-TVSU-1 Time Variable Sequence Unit
could be employed to control your T-R relay, and can assist in the timing
of
the removal of power from our internal relay Active Receive Antennas, if
your transmit antenna is less than 1/2 wavelength away from the receiving
array.
As you can now see, the DX Engineering NCC-1 is a very different device
than
any previously available. The cost of higher performance is well worth
the
results.
Please feel free to contact us if you have questions or comments. We
look
forward to your order for DX Engineering products.
Rod Ehrhart - WN8R
DX Engineering Customer Support
dxengineering@dxengineering.com
Orders 800-777-0703
Tech Support 330-572-3200
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