DX Engineering DXE-PS-2B-P Instructions Manual page 2

Introduction
The DXE-PS-2B-P Pro-Stack Broadband Two Antenna Phasing System is primarily designed to
combine two identical Yagi, log periodic or vertical antennas in a phasing arrangement. The DXE-
PS-2B-P is a frequency independent broadband phasing system that operates with two mono-band
antennas on any band, from 160 through 10 meters. It is a 50Ω system that is switched by applying
12 to 15 volts dc to three control wires. The unit can be used for other applications requiring the
following four basic antenna feed selections:
 Both antenna ports in-phase
 Both antenna ports out-of-phase
 Antenna port 1 only
 Antenna port 2 only
Default is both antenna ports in-phase. To ensure lowest SWR, impedance matching automatically
changes when any antenna is disabled.
Information on the appropriate distances for the separation between the two stacked Yagis, to create
a versatile, high performance array, is discussed fully in the "ARRL Antenna Book", 20th Edition.
Generally, stacked Yagi antennas are separated vertically greater than 1/2-wavelength, free space.
The bottom antenna should generally be as high above ground as the stack spacing distance.
Optimum spacing is generally around one wavelength.
Features
 Power Handling up to 5 kW
 Broad band coverage on 160-10 meters
 RF Shielded Weatherproof Housing - unique protection
 High-RF tolerant, silver - PTFE UHF connectors
 Proven DX Engineering RF Relays - high performance
 Safe 12 volt dc relay operation
 MOV surge protection on control lines
 RoHS compliant assembly
Using Antenna Pattern to your Advantage
Signals arrive at your antenna from different azimuth directions and different elevation angles,
depending on many variables. The ability to steer the major lobe of an antenna (or array of
antennas) in both planes moves the major lobe and nulls, not just the major lobe. Typically two dB
or slightly more is gained by stacking a second antenna. The largest advantage is not necessarily
additional gain, but the ability to move harmful pattern nulls away from primary signal arrival
angles. While gain makes a marginal improvement, moving a null can be a phenomenal change,
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