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The data used to compute the histogram statistics can be downloaded in an ASCII comma
separated variable (CSV) format via the download diagnostics page, see section 8.3.12. The
link loss calculation presented below:
Transmit Data Rate The data rate in the transmit direction, expressed in Mbps and
presented as: max, mean, min, and latest histogram format. The max, min and latest are true
instantaneous measurements; the mean is the mean of a set of one second means.
The histogram is calculated over a one hour period. If the equipment has been running for
less than one hour then the histogram is calculated over the current elapsed time. Expected
data rates can be found in section 6.1.4 " Aggregate Ethernet throughput rate v maximum link
loss ". The data used to compute the histogram statistics can be downloaded in an ASCII
comma separated variable (CSV) format via the download diagnostics page, see section
8.3.12.
Receive Data Rate The data rate in the receive direction, expressed in Mbps and presented
as: max, mean, min, and latest histogram format. The max, min and latest are true
instantaneous measurements; the mean is the mean of a set of one second means.
The histogram is calculated over a one hour period. If the equipment has been running for
less than one hour then the histogram is calculated over the current elapsed time. Expected
data rates can be found in section 6.1.4 " Aggregate Ethernet throughput rate v maximum link
loss ". The data used to compute the histogram statistics can be downloaded in an ASCII
comma separated variable (CSV) format via the download diagnostics page, see section
8.3.12
Link Capacity The maximum aggregate data rate capacity available for user traffic assuming
the units have been connected using Gigabit Ethernet. The link capacity is variable and
depends of the prevailing wireless conditions as well as the distance (range) between the two
wireless units. When the link is idle and in 'IP Mode' the wireless link will adaptively configure
itself into a lower latency mode, this will cause the displayed link capacity and aggregate data
rates to diverge. This is because the aggregate data rate displays the instantaneous capacity
Issue 1.1 April 2006
=
−
P
P
P
ll
T
R
x
x
Where
P
ll
P
T
x
P
R
x
g ,
g
T
R
x
x
Equation 2: Link Loss
+
+
g
g
T
R
x
x
Link Loss (dB)
Transmit
power
wireless unit (dBm)
Received signal power at the local
unit (dBm)
Antenna gain at the remote and local
units respectively (dBi). The antenna
gain of the 300 Mbps Backhaul (23.5
dBi) is used unless one or both of
the 60 Mbps Backhaul units is a
Connectorized version. See Section
14 for more details
of
the
remote
Page 55
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