User's Manual

PMP 400/430 and PTP 200 Series Canopy User Guide
Supplement
Issue 4 0 – DRAFT 6 November 2009 Page 34 of 64
Optimal sector utilization involves having as many links as possible running at 3X. This provides
as much capacity as possible for the sector. As an example, you want to limit throughput to an
individual subscriber to 1X rates. This does not mean you should set that link to 1X operation.
Use MIR (Maximum Information Rate) settings to cap the SM’s bandwidth use, but let the link run
at as high an operation rate as the RF environment will allow. This ensures that any transmission
uses as little “air time” as possible, leaving more “air time” for other SMs.
4.2 TRANSMITTER OUTPUT POWER (AND NO JITTER)
The AP/BHM’s Transmitter Output Power is configured on the AP/BHM’s “Configuration =>
Radio” page.
Radio
Frequency Transmit Output Power
Range
Factory Default
Setting
PMP 58430 5.8 GHz -30 dBm to +20 dBm 16 dBm
PMP 54400
PTP 54200
5.4 GHz
-30 dBm to +12 dBm
10 dBm
PMP 49400
PTP 49200
4.9 GHz
-30 dBm to +18 dBm
18 dBm
In most regulatory regions, including the US, Canada, and Europe, PMP 400/430 and PTP 200
Series modules operating in the 5.8 GHz band are limited to 33 dBm with 10MHz channels and
5.4 GHz band are limited to 27 dBm EIRP (Equivalent Isotropic Radiated Power). This is different
than the 30 dBm EIRP allowed for Canopy FSK modules operating in the 5.4 GHz band because
the regulations are for spectral power density and with half the channel size (10 MHz vs 20 MHz),
PMP 400 and PTP 200 Series radios are allowed half the power (27 dBm vs 30 dBm).
To meet 27 dBm EIRP with the connectorized 18 dBi antenna (with 1 dB of cable loss) that
comes with the 5440AP or 5441AP, or the integrated 17 dBi antenna that comes with a 5440BH
or 5441BH, the maximum setting allowed is 10 dBm (the default) since 27-17=10.
If a connectorized AP or BHM has been purchased and the operator has provided the antenna,
the Transmitter Output Power must be configured based on that antenna and consistent with
local or regional regulations. For example, if a 5440APC is being used with a 15 dBi antenna,
then the maximum setting allowed to meet 27 dBm EIRP is the full 12 dBm of which the radio is
capable.
IMPORTANT!
It is the responsibility of the operator and professional installer to ensure
Transmitter Output Power is set within regulatory limits for their country
or region. These must be set or confirmed on initial configuration and
after a module is reset to factory defaults, and should be confirmed after
the software on a module is upgraded.
In most cases the operator will want to set the AP’s Transmitter Output Power to the maximum
allowed so as to have the greatest overall range and the greatest range for 3X operation. It may
be useful to reduce Transmitter Output Power when Canopy systems are located close together,
with good coverage given because of their proximity and full power isn’t needed, or in cases
where an operator is trying to reduce interference from the Canopy system to other systems.