Mounting the Units:
A site evaluation should have determined the optimal locations for the Central and Remote units, the type of
antennas that would be needed, and the frequency band to be used. (See Cypress Application Note “Site
Evaluation for Duprex RF products”).
This section of the document covers units that utilize the enclosure mounted1/2 wave whip antenna. For other
types of antennas there will be specific documentation to cover their different installation issues.
We are now ready to physically mount the units and make the electrical connections to complete the
installation.
The units should be mounted so that the length dimension of the antennas are in the same plane. The
orientation of the antenna will determine what is referred to as the polarization of the signal. Significant
reduction in range can result if the units are not oriented with the same polarity.
See below.
Both Central and Remote units are arranged so the antennas are
parallel in direction. As shown in this illustration. We would say they are
both vertically polarized. Since the polarity is in the same direction, the
signal strength would be maximized.
In this instance one of the units is vertically polarized, and the other is
horizontally polarized. The signal would be greatly reduced thereby
reducing the maximum distance between units.
The installer should make sure that both units are mounted so that the
polarization will be the same for both units.
In all cases the antennas MUST be mounted at a distance of 20 cm
or greater from any nearby persons
Cypress Suprex RF Series - Field Installation
