Safety Instructions For Powering The Access Point - Cisco Aironet 1570 Series Hardware Installation Manual

Safety Instructions for Powering the Access Point

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For a radiated test bed, the following equation describes the relationships among transmit power, antenna
gain, attenuation, and receiver sensitivity:
txpwr + tx gain + rx gain - [attenuation due to antenna spacing] < max rx input level
Where:
txpwr = Radio transmit power level
tx gain = transmitter antenna gain
rx gain = receiver antenna gain
For a conducted test bed, the following equation describes the relationships among transmit power,
antenna gain, and receiver sensitivity:
txpwr - [attenuation due to coaxial components] < max rx input level
Caution
Under no circumstances should you connect the antenna port from one access point to the antenna port
of another access point without using an RF attenuator. If you connect antenna ports, you must not
exceed the maximum survivable receive level of 0 dBm. Never exceed 0 dBm, or damage to the access
point can occur. Using attenuators, combiners, and splitters having a total of at least 60 dB of attenuation
ensures that the receiver is not damaged and that PER performance is not degraded.
Safety Instructions for Powering the Access Point
Installation of the equipment must comply with local and national electrical codes. Statement
Warning
1074
Warning This equipment must be externally grounded using a customer-supplied ground wire before
power is applied. Contact the appropriate electrical inspection authority or an electrician if you
are uncertain that suitable grounding is available. Statement 366
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
Installation of the equipment must comply with local and national electrical codes. Statement
Warning
1074
Cisco Aironet 1570 Series Outdoor Access Point Hardware Installation Guide
2-8
Reduce the configured transmit power to the minimum level.
Use directional antennas, and keep them away from each other.
Cable the radios together using a combination of attenuators, combiners, or splitters to achieve a
attenuation of at least 60 dB.
Chapter 2 Preparing for Installation
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