Cooper Bussmann VERSION 1.6 BU-945U-E 802.11 DSSS User Manual
Page 19
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Cooper Bussmann Wireless Ethernet & Device Server BU-945U-E 802.11 DSSS User Manual
19
3A1582Rev1.6
Radio Throughput
Below is a table showing the maximum TCP/IP throughput based on channel selection and receiver signal level.
There are five channel bandwidths (20, 10, 5, 2.5, & 1.25MHz). These throughput estimations are based on perfect radio conditions, i.e., little to
no outside radio interference present while data is being passed
BU-945U-E Radio Data Throughput
Data Rate in Mbps
900Mhz Signal Strength
20MHz
10MHz
5MHz
2.5MHz
1.25MHz
-72dBm
22.0
11.0
5.5
2.8
1.4
-75dBm
20.0
10.0
5.0
2.5
1.3
-81dBm
17.0
8.5
4.3
2.1
1.1
-84dBm
11.0
5.5
2.8
1.4
0.7
-88dBm
9.0
4.5
2.3
1.1
0.6
-91dBm
6.0
3.0
1.5
0.75
0.38
-90dBm
5.5
2.8
1.4
0.69
0.34
-91dBm
4.5
2.3
1.1
0.56
0.28
-92dBm
3.0
1.5
0.75
0.38
0.19
-91dBm
2.0
1.0
0.5
0.25
0.13
-93dBm
1.0
0.50
0.25
0.13
0.06
-95dBm
0.5
0.25
0.13
0.06
0.03
Throughput and Repeaters
It should also be noted that if using repeaters to extend the range there will be a reduction in throughput for each repeater hop. The following
table shows the drop in throughput for each hop and for each of the channel widths.
Data Throughput Based on Repeater Hops
Signal/Channel
20 MHz
10 MHz
5MHz
2.5MHz
1.25MHz
Hops
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
-72
22
11
5.5
2.8
11.
5.5
2.8
1.4
5.5
2.8
1.4
.7
2.8
1.4
.69
.34
1.4
.69
.34
.177
-75
20
10
5.
2.5
10.
5.
2.5
1.3
5.
2.5
1.3
.6
2.5
1.3
.63
.31
1.3
.63
.31
.166
-81
17
8.5
4.3
2.1
8.5
4.3
2.1
1.1
4.3
2.1
1.1
.5
2.1
1.1
.53
.27
1.1
.53
.27
.135
-84
11
5.5
2.8
1.4
5.5
2.8
1.4
.7
2.8
1.4
.69
.34
1.4
.69
.34
.17
.69
.34
.17
.094
-88
9
4.5
2.3
1.1
4.5
2.3
1.1
.6
2.3
1.1
.56
.28
1.1
.56
.28
.14
.56
.28
.14
.078
-91
6
3
1.5
.75
3.
1.5
.75
.38
1.5
.75
.38
.19
.75
.38
.19
.09
.38
.19
.09
.059
-91
4.5
2.25
1.1
.56
2.3
1.1
.56
.28
1.1
.56
.28
.14
.56
.28
.14
.07
.28
.14
.07
.044
-92
3
1.5
.8
.38
1.5
.75
.38
.19
.8
.38
.19
.03
.38
.19
.09
.05
.19
.09
.05
.029
-93
1.
.5
.25
.13
0.5
.25
.13
.06
.3
.13
.06
.03
.13
.06
.03
.02
.06
.03
.02
.013