User's Guide Part 2

User Guide: PTP 600 Series Regulatory issues with connectorized units
phn-0896_009v003
Feb 2010
UNDER DEVELOPMENT
8-11
The Set_Max_Transmit_Power parameter
As the actual maximum transmit power can only be adjusted in 1 dB steps, then the
installer or operator must configure the PTP 600 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 8-1 (ass
uming short feeder cables) are shown in Table 8-2.
NOTE
Table 8-2 has b
een calculated on the basis of 0.5 dB cable loss and the
highest gain antennas per size of which we 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.
Table 8-2 Setting maximum transmit power to meet general EIRP limits
Set_Max_Transmit_Power parameter
setting (dBm)
Antenna
size
Maximum
available
antenna
gain
(dBi)
Operating
bandwidth (MHz)
5.4 GHz 5.8 GHz
5 -6 0
10 -3 3
15 -2 4
2ft dish 29.4
30 1 7
5 Not allowed -2
10 -5 1
15 -3 3
2.5ft dish 31.2
30 0 6
5 Not allowed -4
10 -7 -1
15 -5 0
3ft dish 33.4
30 -2 3