Afar AR-24010E, Operator'S Manual

Page: 26 / 108

pulsAR radio Operator's Manual
The following are guidelines you need to follow to achieve a successful synchronization in a complex
network:
1. At any site with multiple radios ensure that all radios are connected to the same LAN. The LAN
connection between radios must run in full duplex and preferably at 100 MHz. Use the “>ether ”
command to verify that the radios auto-negotiated to this setting (you can also use the same
command to disable auto-negotiation and force this setting).
2. You need to use a fixed TDD cycle split throughput the network. If you are co-locating multiple
hubs or roots in a point-to-multipoint or tree configurations, choose any split appropriate for the
traffic in your network. You must use the same value in all co-located radios.
3. When you co-locate all hubs or all roots, you may use a cycle period of either 20 or 40 ms, but it
must be the same in all co-located devices. You can mix hub and root radios at the same site, but
in that case you must set the hubs cycle periods to 20 ms and the roots to 40 ms.
4. You can also co-locate a remote (or a leaf or branch) with other radios. However children nodes
have their cycles synchronized to their parents. So at one given site there can only be one child
2-11
Figure 2.5 - Multiple Topology Network
A
B
B
B
B A B A
LAN
A
B
B
A B
B
A
A
A
Tx Rx Tx Rx Tx
Rx Tx Rx Tx Rx
Time
(A)
(B)