Motorola PTP 300 Series User Manual page 66

Transmit Power: Transmit power histogram
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 Transmit Power may be less than the maximum permitted
Transmit Power due to the TPC (Transmit Power Control) mechanism. This mechanism adjusts
Transmit Power to achieve best link performance while minimizing the interference it causes to
other users of this part of the Spectrum.
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
Vector Error: The vector error measurement compares the received signal's In phase / Quad-
rature (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 approx-
imately -2dB (NLOS link operating at sensitivity limit on BPSK 0.67) to -33dB (short LOS link
running 64 QAM 0.75). See
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
P = Link Loss
l
P = Transmit power of the remote wireless unit
T
P = Received signal power at the local unit
R
g , g = Antenna gain at the remote and local units respectively
t r
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 "histograms". Expected data rates can be found in
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 footnote 8 "histograms". Expected data rates can be found in
Calculations".
8
An 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 comma separated value (CSV) format via the diagnostics CSV Download page, see
Section 8.3.11.2 "Diagnostics Download".
9
The antenna gain of the 300 Series bridge (23.5 dBi) is used unless one or both of the units is a Connectorized
version.
Web Page Reference
8
is expressed in dBm and presented as: max, mean,
footnote 8
footnote 8 "histograms".
"histograms".
− P
P = P + g
l T R
66
"histograms".
+ g
T R
dB
dBm
dBm
9
dBi
Section 14
Section 14
(4)
"Data Rate
"Data Rate