PTP 450 Configuration and User Guide
Task 6: Configuring radio parameters
3-58
pmp-0815 (August 2015)
Table 28
BHS Radio attributes
Attribute
Meaning
Custom Radio
Frequency Scan
Selection List
Check any frequency that you want the BHS to scan for BHM
transmissions.
Prior to System Release 12.0.3, the PTP 450 BHS boot sequence
included loading the current channel bandwidth (10 MHz or 20
MHz, but not both) and frequency band configuration (5.4 GHz
or 5.7 GHz, but not both) and scanning selected frequencies in
the respective frequency band. After a scan of all the selected
frequencies, the BHS can attempt to register to the best BHM
based on the BHS’s current configuration.
With the introduction of the Full Spectrum Band Scan feature in
12.0.3, BHSs first boot into the smallest selected channel
bandwidth (10 MHz, if selected) and scan all selected
frequencies across both the 5.4 GHz and 5.7 GHz frequency
bands.
After this scan, if a wider channel bandwidth is selected (20
MHz), the BHS automatically changes to 20 MHz channel
bandwidth and then scans for BHMs. After the BHS finishes this
final scan it will evaluate the best BHM with which to register. If
required for registration, the BHS changes its channel
bandwidth back to 10 MHz to match the best BHM.
The BHS will attempt to connect to an BHM based on power
level (which affects the modulation state), channel bandwidth
(which affects throughput) and number of BHS registrations to
the BHM (which affects system contention performance).
If it is desired to prioritize a certain BHM over other available
BHMs, operators may use the Color Code Priority feature on the
BHS. Utilization of the Color Code feature on the BHM is
recommended to further constrain the BHS’s BHM selection.
If the BHS does not find any suitable BHMs for registration after
scanning all channel bandwidths, the BHS restarts the scanning
process beginning with the smallest configured channel
bandwidth.
By default, System Release 12.0.3 BHSs are configured to scan
all available frequencies and all available channel bandwidths.
This allows operators to install BHSs and allow them to register
with no pre-configuration or staging required. BHSs upgraded
from a previous release to 12.0.3 retain frequency and channel
bandwidth configuration.
Selecting multiple frequencies and multiple channel bandwidths
impacts the BHS scanning time. The biggest consumption of
time is in the changing of the BHS channel bandwidth setting.
