User's Manual
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If radar is detected on the main frequency, either at startup or during operation, a Channel Availability
Check will be performed on the 1st alternate frequency before it is then used for transmission. If radar is
detected on the 1
st alternate frequency, either during Channel Availability Check or during operation, a
Channel Availability Check will be performed on the 2nd alternate frequency before it is then used for
transmission. If radar is detected on the 2nd alternate frequency, either during Channel Availability Check
or during operation, the radio will cease transmission unless or until the primary channel clears its 30-
minute lock-out.
The alternate frequencies configured in the AP/BHM must be included in the SM/BHS’s Frequency Scan
List, or the SMs/BHS can’t follow their AP/BHM if it switches to a new channel. Additional frequencies
may checked in the Frequency Scan List depending on local practices, for example an operator may want
to configure an SM to only register on certain frequencies to drive a known SM to AP mapping. Another
example would be an operator who configures an SM to register on many frequencies so that it may find
another AP to register to if its usual AP isn’t available.
Note: use site surveys and RF planning to choose alternate frequencies useful for each sector, and
consider testing on the alternate frequencies to ensure compatibility with the sector’s RF environment.
4.5 EXTERNAL GAIN FIELD
An AP, SM, or BH needs to know the gain of its antenna to perform DFS and Auto-TPC (Automatic
Transmit Power Control) (SM only) consistent with regional or national regulations. The GUI includes a
External Gain field to support this.
Key points about the External Gain field include:
External Gain is defined as the gain of the antenna minus the loss in the coaxial cable and
connectors.
The External Gain is set on the Configuration => Radio page of each module (AP, SM, BHM, or
BHS)
The default on a 5.8-GHz SM or a unit reset to factory default is 0 dB
The range is 0 to 35 dB.
Any radio using DFS will use the External Gain to appropriately adjust sensitivity to radar signals.
The use of DFS is determined by the Region Code setting on the Configuration => Home page.
The Auto-TPC used by the Cyclone OFDM Series system takes into account the External Gain so
as not to exceed national or regional EIRP limits.
Procedure for setting the External Gain
1. If using a BH or SM with an integrated antenna or a connectorized AP with the connectorized antenna
sold with it, leave the External Gain on the Configuration => Radio page set to the factory default of 17
dB. If using another antenna, set the External Gain to the gain of the antenna minus the loss in coaxial
cable and connectors.
IMPORTANT!
Ensure the External Gain is set correctly. Setting it low or high can lead to either a system overly
sensitive to DFS events or a system not transmitting at its full legal power.
4.6 NETWORK CONTROL PARAMETERS
Parameters for High Priority/DiffServ, NAT, DHCP, VLAN, MIR, and CIR are configured the same as they
are in standard Canopy. The operator may (or may not) want to take advantage of the higher possible
MIR to provide greater bandwidth to a given SM.
4.7 FORWARD ERROR CORRECTION