User's Manual

8 Web Page Reference
138
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 Section 8.2.1 “Histogram Data”.
Link Los
s: The link loss is the total attenuation of the wireless signal between the two
point-to-point units. See Section 8.2.1 “Histogram Data”..
The lin
k loss calculation presented below:
Equation 3 - Link Loss
xxxx
RTRTll
ggPPP
+
+
−
=
Where is
ll
P
Link Loss (dB)
x
T
P
Transmit power of the remote wireless unit
(dBm)
x
R
P
Received signal power at the local unit
(dBm)
xx
RT
gg ,
Antenna gain at the remote and local units
respectively (dBi). The antenna gain of the
600 Series bridge (23.5 dBi) is used unless
one or both of the units is a Connectorized
version.
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 Section 8.2.1 “Histogram Data”. Expected data rates can be found in Section 16 “Data
Rate Calculat
ions”.
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. See
Section 8.2.1 “Histogram Data”. Expected data rates can be found in Section 16 “Data Rate
Cal
culations”.