User guide

Canopy System User Guide Configuring an AP for the Destination
pmp-0229 (Mar 2013)
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• Countries and regions that permit the use of the 5.4-GHz frequency band (CEPT member
states, for example), generally require equipment using the band to have adjustable power. In
the 5.4-GHz PMP 400 Series OFDM AP, transmitter output power is settable in the range of
−30 to 15 dBm. However, with only the integrated antenna, where regulation
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requires that
EIRP is not greater than 27 dBm, compliance requires that the transmitter output power is set
to 10 dBm or less. With a 12 dBi external antenna on the connectorized version of this AP,
the full range (up to 15 dBm) is acceptable.
The professional installer of the equipment has the responsibility to
• maintain awareness of applicable regulations.
• calculate the permissible transmitter output power for the module.
• confirm that the initial power setting is compliant with national or regional regulations.
• confirm that the power setting is compliant following any reset of the module to factory
defaults.
For information on how to calculate the permissible transmitter output power to enter in this
parameter, see Adjusting Transmitter Output Power on Page 382.
SM TX Power Control
An AP can control registered SMs’ transmit power level such that a desired receive target power is
seen at the AP. This feature is useful in DFS regions so that signals from close-in SMs are not
being received at excessively high power levels which may cause the AP to false detect. It is also
useful for managing the general RF environment and controlling effective sector size by ensuring
that SMs don’t transmit at any higher power than required. The SM TX Power Control option is
only available on PMP 100 APs which are Transmit Power Control (TPC) capable. This includes
all series P10 and P11 PMP 100 (FSK) radios as well as some P9 radios that have adjustable
power (instead of Normal/Low Power). All 900-MHz radios are TPC capable. Likewise, only SMs
that are TPC capable will be able to use SM power control. If SM power control is enabled on an
AP and an SM which is not TPC capable connects to that AP, it will ignore any power adjust
requests and will operate as it did prior to Release 10.5. Also, any SMs which are not upgraded to
Release 10.5 will ignore any power adjust requests and will operate with fixed power as set by the
operator.
SM Receive Target Level
Each SM’s Transmitter Output Power is automatically set by the AP. The AP monitors the
received power from each SM, and adjusts each SM’s Transmitter Output Power so that the
received power at the AP from that SM is not greater what is set in this field. This value
represents a “single-port” power perceived on the SM.
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This is the case in most regions, including the U.S.A., Europe, and Canada.