User's Manual Part 1
Release8OverviewofCycloneNetworks
Issue2,November2007 Draft5forRegulatoryReview 92
Checking the Status of 2X Operation
The Session Status tab in the Home page of the AP provides operation status information
about each SM-to-AP link. Under the MAC address of each SM, the data in this tab
includes a line such as the following:
RATE : VC 19 Rate 2X/2X VC 255 Rate 2X/1X
Interpret this information is as follows:
◦ VC means virtual channel. If one VC is displayed, the high-priority channel is
disabled. If two are displayed, the high-priority channel is enabled and is using
the higher number VC (255 in the above example).
◦ 2X/2X indicates that the SM-to-AP link is in 2X operation.
◦ 2X/1X indicates that the SM is capable of 2X operation but the SM-to-AP link is in
1X operation. This can be for either of the following reasons:
• The SM has not sent data on the channel yet.
• The received signal does not support 2X operation.
◦ 1X/1X indicates that the SM is capable of only 1X operation. This can be for
either of the following reasons:
• The SM does not support 2X operation (SM is of the hardware series P7
or P8).
• The 2X Rate parameter is disabled in the General tab of the Configuration
page in the SM or the AP.
CAUTION!
2X operation requires approximately 3 to 5% more power than 1X operation.
This additional power affects the recommended maximum for power cord length
feeding the CMMmicro. See
Table 50 on Page 347. However, 2X operation does
not affect the maximums for the CMM2.
Disabling 2X Operation
Disabling 2X operation for an SM can be helpful for alignment, troubleshooting, or
preventing frequent automatic switches between 2X and 1X, where RF conditions are
only marginally favorable to 2X. The ability to disable 2X for an SM is inherent since the
2X Operation feature was introduced.
Disabling 2X operation for a sector can be helpful for identifying a baseline for 1X-to-2X
comparison, broader troubleshooting activities, or forcing all SMs to 1X rather than
disabling 2X in each SM. Release 8 provides a 2X Rate parameter in the General tab of
the Configuration page in the AP:
◦ If you click Disable, then Save Changes and Reboot, 2X operation is disabled
for the sector, regardless of the 2X Rate setting in each SM.
◦ If you later click Enable, then Save Changes and Reboot, 2X operation is
enabled in the sector for SMs with 2X Rate enabled on their
Configuration>General page. SMs with 2X Rate disabled on their
Configuration>General page (or P7 or P8 SMs that don’t support 2X Rate) will
only operate at 1X.