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Ethernet Speed and Duplex The negotiated speed and duplex setting of the Ethernet
interface. The speed setting is specified in Mbps. Full Duplex data transmission means that
data can be transmitted in both directions on a signal carrier at the same time. For example,
on a local area network with a technology that has full duplex transmission; one workstation
can be sending data on the line while another workstation is receiving data. Half Duplex data
transmission means that data can be transmitted in both directions on a signal carrier, but not
at the same time. For example, on a local area network using a technology that has half
duplex transmission, one workstation can send data on the line and then immediately receive
data on the line from the same direction in which data was just transmitted.
Channel A The status of telecoms interface A.
Channel B The status of telecoms interface B.
Wireless Link Status As the attribute name suggests it displays the current status of the
Canopy 150/300 Mb BH wireless link. A state of 'Up' on a green background indicates that a
Point-to-Point link is established. A state of 'Down' on a red background indicates that the
wireless link is not established. If the link is down for an unknown reason the system
administrator should first consult the status webpage for a more detailed summary of the
prevailing system diagnostics.
Maximum Transmit Power The maximum transmit power that the local wireless unit is
permitted to use to sustain a link.
Remote Maximum Transmit Power The maximum transmit power that the remote wireless
unit is permitted to use to sustain a link.
Transmit Power Transmit power histogram is expressed in dBm and presented as: max,
mean, min, and latest. 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. The data used to compute the histogram statistics
can be downloaded in an ASCII comma separated variable (CSV) format via the diagnostics
download page, see section 8.3.12
Receive Power Receive power histogram is expressed in dBm and presented as: max,
mean, min, and latest. 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. 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
Vector Error The vector error measurement compares the received signals In phase /
Quadrature (IQ) modulation characteristics to an ideal signal to determine the composite error
vector magnitude. The results are stored in a histogram and expressed in dB and presented
as: max, mean, min and latest. 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. The expected range for Vector
Error would be approximately -2dB (NLOS link operating at sensitivity limit on BPSK 0.67) to
–33dB (short LOS link running 256 QAM 0.83). 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 Loss The link loss is the total attenuation of the wireless signal between the two
Point-to-Point units.
Issue 1.1 April 2006
Page 54
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