Specifications

Chapter 5 Diagnostics and Troubleshooting FibeAir 4800 Installation and Operation Guide
5-18 FibeAir 4800 Installation and Operation Guide
Q: Can we use horizontal and vertical polarization on the same frequency to
double the number of wireless links?
A: Installing two FA4800 systems in the same band with cross polarization provides
20–25 dB separations. Nevertheless, since there are reflections, the cross
polarization separation is decreased and spatial separation is recommended.
Q: Could you add the frequency of 5.735 to the manual selection in order to
increase the number of 20 MHz channels to six?
A: Currently the system provides fixed channels, with one manual frequency
setting. The manual setting provides flexibility of spectrum selection, including
5.735 MHz.
Q: Can we mange FA4800 using SNMPc other than the supplied management
software that comes with the units?
A: Yes. The FA4800 is SNMP-based. FA4800 can be managed when using other
SNMP software after implementing CERAGON MIB’s.
Q: Can FA4800 be managed and configured via Telnet?
A: No. Use only the FA4800 software manager.
Q: Can I use FA4800 with any vendor’s external antenna?
A: Yes. CERAGON supplies the FA4800 external ODU with an N-type typical
connector. Any vendor’s external antenna that can be cascaded to our external
unit can be used without problem. Please note that dB losses in the cascading
cable between the external ODU and antenna should be taken into consideration.
(In the supplied cascading cable of one meter we have 1 dB loss)
Q: Do we need to add external arrestors on FA4800 cables?
A: The FA4800 ODU includes arrestors and lightning protection. Therefore there is
no need to add additional arrestors.
Q: What is the actual Ethernet data rate and maximum throughput?
A: The maximum net throughput of FA4800 is full duplex 18 Mbps.
FA4800 is a symmetrical system
Q: What is the sensitivity for each rate of the FA4800?
A: The rate sensitivities are:
Rate
[Mbps]
Sensitivity
[dB]
12 -84
18 -81
36 -74
48 -68
Note