User's Manual
Table Of Contents
- PTP 250 User Guide
- Copyrights
- Safety and regulatory information
- Contents
- List of Figures
- List of Tables
- About This User Guide
- Chapter 1 Product description
- Chapter 2 Planning considerations
- Chapter 3 Legal information
- Chapter 4 Reference information
- Chapter 5 Installation
- Chapter 6 Configuration and alignment
- Chapter 7 Operation
- Chapter 8 Troubleshooting
- Testing link end hardware
- Testing when PoE LEDs do not illuminate correctly
- Testing after a lightning strike
- Test flowcharts
- AC LED is off
- AC LED is flashing
- PORT LED is off
- PORT LED is flashing
- Test Ethernet packet errors reported by ODU
- Test Ethernet packet errors reported by managed switch or router
- Test ping packet loss
- Test resistance at the PoE end of the drop cable
- Testing the radio link
- Testing link end hardware
- Glossary
Compliance with safety standards Chapter 4 Reference information
phn-2182_002v000
4-24
May 2011
Power density exposure limit
Install the radios for the PTP 250 families of PTP wireless solutions so as to provide
and maintain the minimum separation distances from all persons.
The applicable power density exposure limit from the standards (see Human exposure
to
radio frequency energy on page 4-23 ) is 10 W/m
2
for RF energy in the 5.4 GHz and
5.8 GHz frequency bands.
Calculation of power density
NOTE
The following calculation is based on the ANSI IEEE C95.1-1991 method, as
that provides a worst case analysis. Details of the assessment to
EN50383:2002 can be provided, if required.
Peak power density in the far field of a radio frequency point source is calculated as
follows:
Where: Is:
S
power density in W/m
2
P
maximum average transmit power
capability of the radio, in W
G
total Tx gain as a factor, converted
from dB
d
distance from point source, in m.
Rearranging terms to solve for distance yields:
2
4
.
d
GP
S
π
=
S
GP
d
.4
.
π
=