Chapter 7: Operation
System summary and status
Attribute
Meaning
Vector Error
The maximum, mean, minimum and latest measurements of Vector
Error (dB). See
Vector Error compares the received signals In phase / Quadrature (IQ)
modulation characteristics to an ideal signal to determine the composite
error vector magnitude.
The expected range for Vector Error is approximately -2 dB (NLOS link
operating at sensitivity limit on BPSK 0.67) to -33 dB (short LOS link
running 256 QAM 0.83).
Link Loss
The maximum, mean, minimum and latest measurements of Link Loss
(dB). See
The link loss is the total attenuation of the wireless signal between the
two point-to-point units. The link loss calculation is presented below:
x
x
x
x
R
T
R
T
ll
g
g
P
P
P
+
+
−
=
Where:
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)
x
x
R
T
g
g
,
= Antenna gain at the remote and local units
respectively (dBi). The antenna gain of the PTP 650 Series
(23.5 dBi) is used unless one or both of the units is a
Connectorized version.
For connectorized ODUs, the link loss calculation is modified to allow for
the increased antenna gains at each end of the link.
Transmit Data Rate
The maximum, mean, minimum and latest measurements of Transmit
Data Rate (Mbps). See
Receive Data Rate
The maximum, mean, minimum and latest measurements of Receive
Data Rate (Mbps). See
Link Capacity
Variant
Indicates whether the installed license key is Lite, Mid or Full.
When a link is established, this attribute shows the lower of the license
keys at each end. For example, if this end is Full and the other end is Lite,
it shows “Lite”. To see the installed key, go to the Installation Wizard.
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