Cambium PTP 450 series, Руководство пользователя

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PTP 450 User Guide Overview of PTP 450
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ptp-450 (July 2014)
Overview of PTP 450
This section describes the key features, typical uses, product variants and components of the PTP 450.
Purpose
Cambium PTP 450 Series networks are designed for wireless point-to-point links in the unlicensed 3.5 GHz, 3.6
GHz, 5.4 GHz and 5.8 GHz bands. Users must ensure that the PTP 450 Series complies with local operating
regulations.
The PTP 450 Series adds dramatically increased network throughput and capacity. The PTP 450 Series enables
network operators to grow their business by offering more capacity for data, voice and video applications.
Key Features
The Cambium PTP 450 Series offers the following benefits:

Cambium’s highest performing point-to-point solution, with up to 125 Mbps usable throughput.

State-of-the-art MIMO (Multi-In Multi-Out) technology.

Better spectral efficiency than other MIMO alternatives.

MIMO Matrix B: This technique provides the ability to double the throughput of a radio transmission under
proper RF conditions. Different data streams are transmitted simultaneously on two different antennas.

Running changes to the 5 GHz PTP450 BHS (the radios supports 5.4 GHz and 5.7 GHz) that adds more
FLASH memory to the PCB of the radio.

SnLOS benefits and limitations
In addition to providing LOS (Line-Of-Sight) connectivity, use of OFDM technology can provide nLOS (near Line-
Of-Sight) connectivity and sometimes NLOS (Non-Line-Of-Sight) connectivity:

LOS: the installer can see the BHM from the BHS and the first Fresnel zone is clear.

nLOS: the installer can see the BHM from the BHS, but a portion of the first Fresnel zone is blocked.

NLOS: the installer cannot see the BHM from the BHS and a portion or even much of the first Fresnel zone is
blocked, but subsequent Fresnel zones are open.
Figure 1 Line of Sight Diagram