Spectrum Management - Motorola PTP 600 series User Manual

User Guide: PTP 600 Series

Spectrum management

The spectrum management feature of the PTP 600 Series monitors the available
wireless spectrum and directs both ends of the wireless link to operate on a channel
with a minimum level of co-channel and adjacent channel interference.
Spectrum management measurements
The PTP 600 Series performs two mean signal measurements per TDD cycle, per
channel. This mean measurement represents the mean received signal power for the
40 microseconds measurement period.
The Spectrum Management algorithm collects measurements equally from all
channels. This process is called the Channel Availability Check (hereafter referred to
by the acronym CAC). The CAC uses a round-robin channel selection process to collect
an equal amount of measurements from each channel. The CAC measurement process
is not altered by the channel barring process. Measurements are still collected for all
channels irrespective of the number of barred channels.
Measurement analysis
Spectrum Management uses statistical analysis to process the received peak and mean
measurement. The statistical analysis is based on a fixed, one minute, measurement
quantization period. Spectrum Management collects data for the specified
quantization period and only at the end of the period is the statistical analysis
performed. The analysis produces three key metrics for each channel:
•
Peak of Means
•
99.9% Percentile of the Means
•
Mean of Means
These metrics are defined in
27.
Statistical summary
The display of statistical measurement on the spectrum management page always
shows a statistical summary of all channel measurement. The statistical summary is
controlled by the Statistics Window attribute. This attribute defaults to a value of
twenty minutes, which means that the mean and percentile values displayed for each
channel are calculated over the 20 minute period. All channel decisions are made
using the values computed over the statistics window period.
phn-0896_012v000
Jul 2010
4Gon www.4Gon.co.uk info@4gon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
Interpreting the spectrum management plots
Wireless operation
on page 7-
1-27