Motorola PTP 600 Series User Manual page 129

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 Loss: 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 link loss calculation presented below:
Where
P
ll
P
T
x
P
R
x
g , g
T R
x x
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 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. See
Section 8.2.1 "Histogram Data". Expected data rates can be found in Section 16 "Data Rate
Calculations".
Equation 3 - Link Loss
  
P P P g
ll T R T
x x x
is
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
600 Series bridge (23.5 dBi) is used unless
one or both of the units is a Connectorized
version.
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g
R
x