Chapter 3: System planning
Radio spectrum planning
Page 3-27
Table 24 PTP 550 wireless specifications (per frequency band)
Item
5.1 GHz
5.2 GHz
5.4 GHz
5.8 GHz
RF band (MHz)
5150–5250
5250–5350
5470–5725
5725–5875
Channel bandwidth
(MHz)
20, 40, 80
20, 40, 80
20, 40, 80
20, 40, 80
Typical antenna gain
(integrated)
23 dBi
23 dBi
23 dBi
23 dBi
Antenna beamwidth
(integrated)
8°
8°
8°
8°
Regulatory limits
Many countries impose EIRP limits (Allowed EIRP) on products operating in the bands used by
the PTP 550 Series. For example, in the 5.4 GHz and 5.8 GHz bands, these limits are calculated
as follows:
•
In the 5.4 GHz band (5470 MHz to 5725 MHz), the EIRP must not exceed the lesser of 30
dBm or (17 + 10 x Log Channel width in MHz) dBm.
•
In the 5.8 GHz band (5725 MHz to 5875 MHz), the EIRP must not exceed the lesser of 36
dBm or (23 + 10 x Log Channel width in MHz) dBm.
Some countries (for example the USA) impose conducted power limits on products operating
in the 5.8 GHz band.
Conforming to the limits
Ensure the link is configured to conform to local regulatory requirements by configuring the
Country parameter (located in the web management interface at Configuration > Radio). When
using connectorized ODUs with external antennas, also ensure that the antenna gain is
configured correctly in the ODU.
Available spectrum
The available spectrum for operation depends on the regulatory band. When configured with
the appropriate license key, the unit will only allow operation on those channels which are
permitted by the regulations.
Certain regulations have allocated certain channels as unavailable for use:
•
ETSI has allocated part of the 5.4 GHz band to weather radar.
