Motorola PTP 500 User's Guide Page 215

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PTP 300 and PTP 500 Series User Guide Electromagnetic compliance
phn-1115_006v000
Sep 2010
4-63
The Set_Max_Transmit_Power parameter for connectorized units
As the actual maximum transmit power can only be adjusted in 1 dB steps, then the
installer or operator must configure the system to have a Set_Max_Transmit_Power
parameter as calculated below:
Set_Max_Transmit_Power = [Max_Transmit_Power] rounded down to nearest
lower dB step
In order to simplify matters, the settings to be used for regions with the EIRP limits in
Table 4-54 (as
s
uming short feeder cables) are shown in Table 4-55.
Table 4-55 Setting maximum transmit power to meet general EIRP limits
Set_Max_Transmit_Power
parameter setting (dBm)
Antenn
a size
Maximum
available
antenna
gain (dBi)
Operating
bandwidth
(MHz)
5.4 GHz 5.8 GHz
5 -6 0
10 -3 3
2ft dish 29.4
15 -2 4
5 -8 -2
10 -5 1
2.5ft
dish
31.2
15 -3 3
5 -10 -4
10 -7 -1
3ft dish 33.4
15 -5 0
5 -11 -6
10 -8 -3
4ft dish 34.8
15 -7 -1
NOTE
Table 4-55 has bee
n calculated on the basis of 0.5 dB cable loss and the
highest gain antennas per size of which Motorola are aware. At these
operating frequencies, feeder losses even with short cables are unlikely ever
to be below 0.5 dB for practical installations and cable diameters.
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