Motorola MOTOwi4 Canopy 30 User Manual page 54

Vector Error The vector error measurement compares the received signal's 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 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 0dB (NLOS
link operating at sensitivity limit on BPSK ½) to –29dB (short LOS link running 64QAM 7/8).
The data used to compute the histogram statistics can be downloaded in an ASCII command
separated variable (CSV) format via the download diagnostics page, see Section 8.3.14.
Link Loss This is the total attenuation of the wireless signal between the two Point-to-Point
units.
The data used to compute the histogram statistics can be downloaded in an ASCII command
separated variable (CSV) format via the diagnostics CSV Download page, see Section 8.3.14.
The link loss calculation presented below:
Receive Data Rate The data rate in the receive direction, expressed in Mbps and presented
as: max, mean, min, and latest histogram format.
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 command
separated variable (CSV) format via the diagnostics CSV Download page, see Section 8.3.14.
Transmit Data Rate The data rate in the transmit direction, expressed in Mbps and presented
as: max, mean, min, and latest histogram format.
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 command
separated variable (CSV) format via the download diagnostics page, see Section 8.3.14.
Issue 3.1, July 2006
= P − P + g + g
P
ll T R T
x x x
Where
P
ll
P
T
x
P
R
x
g ,g
T R
x x
Equation 2: Link Loss
R
x
Link Loss (dB)
Transmit power of the remote
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 30/60 Mbps Backhaul
(23.5 dBi) is used unless one or both
of the 30/60 Mbps Backhaul units is a
Connectorized version.
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