Hi-Z Antennas HIZ-PC-4A Manual - Page 2

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The Hi-Z Antennas™ HIZ-PC-4A is a signal phasing system that combines the received signals from 4

different shortened vertical elements placed in a square making a phased array.

This phased array produces a narrow pattern selectable in 4 different directions while allowing 12 dB

maximum of RDF (Relative Directivity Factor) and up to 30 dB of front to back ratio. Actual RDF and front to

back depends on the array layout size, frequency, wave arrival angle, and Delay Cable values.

This controller operates from 13.8 Volts DC (+11 to +14) at 300 milliamps or less.

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Power is supplied via the Screw terminals marked +13.8 and GND

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Direction Control is via 2 Screw terminals marked CTRL 1 and CTRL2

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Direction control is achieved through grounding combinations of the CTRL terminals

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Output RF impedance is a nominal 75 ohms for feedline cable impedance matching

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The front view size is 3 3/4 X 6 1/4 inches Depth is 2 1/4 inches including input and output connectors

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The screw connectors are universal stainless-steel screw terminals

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Output, Delay, and Antenna Input connectors are high-quality RG-6 coaxial cable connectors

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Each CTRL switching line is transient protected with an MOV and a reverse diode

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The controller supply voltage is protected against overvoltage by an MOV device

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Internal adjustment by movable header pins for 80- or 60-foot array side dimension

Direction Control

The HIZ-SS2 or HIZ-SS2-Plus are used depending on the array package selected during purchase. The

switch grounds to less than 1 Volt DC the CTRL lines per the table below. Just like a PTT line grounds to

The SS2 is manual only and the SS2-Plus offers manual and USB direction control

RDF= Relative Directivity Factor which relates to signal to noise improvement

The receiving elements can be placed at 60 or 80 feet per side

dimension depending on the user's needs. The elements are placed in a

square configuration. The elements need to maintain their equidistant

symmetry. The array can be directionally offset if necessary. The HIZ-SS2

and HIZ-SS2-Plus Shack Switch controls can accept offset values however

because of the relatively wide pattern an offset would not normally be

required with this array.

All four elements must be mounted at ground level within a few inches.

Mounting on a pedestal is very difficult to make work properly. The elements

can be mounted on sloping ground without serious degradation unless the

slope across the array becomes more than ¼ the height of the verticals.

Most installations only require an element ground rod; however, some may

require some short radials in very poor soil. Radial length approaching

element length should suffice. Eight radials equally arranged should suffice

in most really bad soil cases.

The switching table for this array

Direction

The HIZ-SS2

activate.

CTRL 1

CTRL 2

11-14 VDC

<1 VDC

11-14 VDC

<1 VDC