Rf Link Loopback Test (Linktest Command) - Trango Systems ATLAS4900 User Manual

Configuration

RF Link Loopback Test (linktest command)

The linktest command tests the throughput and packet error rate (PER) on the current channel for each direction at all
speeds and reports results. This command also provides RSSI for both ends of the wireless link. The command can be
run from either the MU or the RU.
In running the linktest command the user must specify the modulation speed for each end of the link.
Command format: linktest <loc speed> <peer speed>
Valid modulation speeds are: 6,12,18,24,36,48, and 54 Mbps.
Example:
# linktest 24 24
local tx rate = 24 Mbps
peer tx rate = 24 Mbps
packet size = 1600 bytes
# of packets per period = 1000
# of Cycle = 10
0> [tx] 1000 [rx] 1000 [rssi] -37
1> [tx] 1000 [rx] 1000 [rssi] -37
2> [tx] 1000 [rx] 1000 [rssi] -37
3> [tx] 1000 [rx] 1000 [rssi] -37
4> [tx] 1000 [rx] 1000 [rssi] -37
5> [tx] 1000 [rx] 1000 [rssi] -37
6> [tx] 1000 [rx] 1000 [rssi] -37
7> [tx] 1000 [rx] 1000 [rssi] -37
8> [tx] 1000 [rx] 1000 [rssi] -36
9> [tx] 1000 [rx] 1000 [rssi] -37
--> [tx] 10000 [rx] 10000 [rssi] -36
--> [Local PER] 0.00 %
Success.
#>
In this example the linktest was run at 24 Mbps at each end of the link. The results indicated 10 cycles of 1000 packets
were transmitted and received from each end of the link without error. Actual achievable throughput is measured at 22
Mbps.
Trango Broadband Wireless — Atlas4900 User Manual Rev. 1.3
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 1000 [rx] 1000 [rssi] -40 ->
peer: [tx] 10000 [rx] 10000 [rssi] -40
[Peer PER] 0.00 %
22.01 Mbps
22.01 Mbps
22.01 Mbps
22.01 Mbps
22.01 Mbps
22.01 Mbps
22.01 Mbps
22.00 Mbps
22.01 Mbps
22.01 Mbps
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