8 Web Page Reference
84
xxxx
RTRTll
ggPPP
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. See footnote 8.
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 an 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 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). See footnote 8.
Link Loss: The link loss is the total attenuation of the wireless signal between the two
point-to-point units. See footnote 8.
The link loss calculation presented below:
Where is
ll
P
x
T
P
x
R
P
xx
RT
gg ,
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)
9
.
Equation 2 - Link Loss
Transmit Data Rate: The data rate in the transmit direction, expressed in Mbps and
presented as: max, mean, min, and latest in an histogram format. The max, min and latest
are true instantaneous measurements; the mean is the mean of a set of one second means.
See footnote 8. Expected data rates can be found in Section 14 “Data Rate Calculations”.
Receive Data Rate: The data rate in the receive direction, expressed in Mbps and presented
as: max, mean, min, and latest in an histogram format. The max, min and latest are true
instantaneous measurements; the mean is the mean of a set of one second means.
9 The antenna gain of the 500 Series bridge (23.5 dBi) is used unless one or both of the units is a
Connectorized version.
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