User's Manual

Exalt Communications, Inc.
r-series Installation and Management Manual
5000007 (ETSI) 14
2007-02-12 (draft)
For the EX-5r family, operation in the 5725-5850 MHz band, using a 20 MHz BW setting
(shown as 16 MHz in the GUI), a +36dBm EIRP limit applies. Using the same definitions as
above, set the transmitter according to this equation:
P = 36 – G + L
Time Division Duplex (TDD) Factors
The r-Series radios are very dynamic, allowing the installer to optimize and control the
performance of the radio system for the intended application. The following parameters must be
carefully determined during the link engineering phase:
• Link distance
• Bandwidth
• TDD frame size
• Mode (modulation)
The setting of the above parameters determines the following performance factors:
• Number of supported T1/E1 channels
• Ethernet throughput
• System latency (delay)
Use the ExaltCalc calculator to determine optimum settings for the above parameters to meet the
needs of your application.
The following generalizations can be made with regards to these factors:
• The shorter the TDD frame size, the lower the latency
• The shorter the link distance, the lower the latency, the higher the throughput
• The longer the TDD frame size, the higher the throughput
• The higher the bandwidth, the higher the capacity
• The higher the mode, the higher the capacity
Disable all T1/E1 ports if there are no T1/E1 interfaces connected. This shifts all
available throughput to the Ethernet interface.
If a selected combination of the Link Distance, Frame Size, Bandwidth, and Mode
parameters cannot support all four T1 or E1 ports, the ports that cannot be
supported are automatically disabled. Priority is placed on the T1/E1 port number.
That is, the first port to be disabled, if necessary, is the highest port number, such
as Port 4.