PTP 250 User Guide
Wireless specifications
phn-2182_002v000
May 2011
4-19
Wireless specifications
This section contains specifications of the PTP 250 wireless interface. These
specifications include RF bands, channel width and link loss.
General wireless specifications
Table 4-14
contains radio system specifications for the 5.4 GHz band.
Table 4-15
contains radio system specifications for the 5.8 GHz band.
Table 4-14
5.4 GHz RF specifications
Radio technology
Specification
RF band
5.470-5.725 GHz
Channel selection
By dynamic frequency control and manual intervention
Automatic detection on start-up and continual adaptation.
Dynamic frequency control
Initially 10-15 sec. Out of service on interference 100 ms.
Channel width
20 MHz and 40 MHz
Manual power control
Maximum power can be controlled lower than the power
limits in order to control interference to other users.
Receiver noise figure
Typically 6 dB
Integrated antenna type
Integrated flat plate antenna; gain 23dBi
External antenna gain
See
Calculating EIRP for connectorized units
on page
4-30
.
Antenna beamwidth
8 Degrees
Max path loss
150 dB (20 MHz channel, integrated antenna)
Range (optical line-of-sight)
27 km (17 miles) at channel width 20 MHz
54 km (34 miles) at channel width 40 MHz
Over-the-air encryption
Proprietary scrambling mechanism.
Weather sensitivity
Sensitivity at higher modes may be reduced during high winds
through trees due to Adaptive Modulation Threshold changes
Error correction
FEC
Summary of Contents for Motorola PTP 250
Page 20: ...List of Tables phn 2182_002v000 xiv May 2011 ...
Page 30: ......
Page 80: ...Data network planning Chapter 2 Planning considerations phn 2182_002v000 2 22 May 2011 ...
Page 126: ...Notifications Chapter 4 Reference information phn 2182_002v000 4 36 May 2011 ...
Page 234: ...Testing the radio link Chapter 8 Troubleshooting phn 2182_002v000 8 14 May 2011 ...