User guide

Release9.5ReleaseNotes



Issue2,October2009  Page16
2.3.2 US5.4‐GHzRadiosandtheTDWRBand
To prevent co-channel operation with Terminal Doppler Weather Radar (TDWR) systems, P10
and P11 5.4-GHz APs and BHMs configured with a Region Code of United States running
Release 9.5 will not use or allow configuration of the center channel frequencies shown in table 5.
Table 5: Center channels unavailable
Product
Family
Products Center Channel Frequencies not
available
FSK CAP 100 (AP)
PTP 100 (BH)
5590 through 5660 MHz (on 5-MHz
increments) not available
OFDM CAP 54400 (AP)
PTP 54200 (BH)
5600 through 5650 MHz (on 5-MHz
increments) not available
This applies to the Radio Frequency Carrier, as well as the Alternate Frequency Carrier 1 and
Alternate Frequency Carrier 2 on an AP’s or BHM’s Configuration => Radio page. As discussed
in section 2.3, avoiding the TDWR band addresses FCC concerns about possible interference
caused by Part 15 devices with TDWR.
Operators with 5.4-GHz APs or BHMs set to a Region Code of United States are well-served to
ensure they are not using any of the unavailable channels before upgrading. Operators may need
to perform channel planning and coordinated change of the transmitting channel on APs or BHMs
before the upgrade.

CAUTION!
Before upgrading a P10 or P11 5.4-GHz FSK AP or BHM with a
Region Code of United States to Release 9.5, ensure that it is not
configured with a center channel of 5590 through 5660 MHz.
Before upgrading a 5.4-GHz OFDM AP or BHM with a Region Code of
United States to Release 9.5, ensure that it is not configured with a
center channel of 5600 through 5650 MHz.
If an affected AP or BHM is inadvertently left set to one of these center channels before
upgrading, after the upgrade it will not have an operating Radio Frequency Carrier configured,
will not transmit, and there will be no link or service to SMs or a BHS. To recover after the
upgrade, configure the Radio Frequency Carrier of the AP or the BHM to an available channel –
one displayed on the AP’s or BHM’s Configuration => Radio page.
Similarly, if the Alternate Frequency Carrier 1 or Alternate Frequency Carrier 2 is
inadvertently left set to one of these center channels, the alternate frequencies will not be
available in the case of a DFS event.
The Custom Frequency Scan List on SMs and BHSs set to a Region Code of United States is
not affected. Since the center channel frequencies listed in Table 5 will not be used (the AP or
BHM won’t be transmitting on them) operators may want to disable scanning of these frequencies
by the SMs and BHSs to reduce scan time.