User Manual

Compliance with radio regulations Reference information
4-22
pmp-0047 (December 2012)
Europe applies the ETSI specification to both APs and SMs, while Brazil applies it only to APs. In the ETSI case,
when an SM is powered on, it scans to find a Canopy beacon from a AP. If an AP is found, the SM performs a
channel availability check on that frequency for 1 minute, monitoring for the radar signature, without transmitting.
A DFS decision is made based on the following:
• If no radar pulse is detected during this 1 minute, the SM proceeds through normal steps to register to an AP.
• If the SM does detect radar, it locks out that frequency for 30 minutes and continues scanning other frequencies
in its scan list.
After an SM with DFS has seen a radar signature on a frequency and locked out that frequency, it may connect to a
different AP if color codes, AP transmitting frequencies, and SM scanned frequencies support that connection.
To simplify operation and ensure compliance, an SM takes on the DFS type of the AP to which it registers. For
example, when an SM in Europe registers to an AP with the Country Code set to “United Kingdom”, that SM will
use ETSI DFS, no matter what its Country Code is set to, even if its Country Code is set to “None”. Note, the
operator should still configure the Country Code in the SM correctly, as future releases may use the Country Code
for additional region-specific options.
For all modules running DFS, the module displays its DFS state on its Home => General Status page as one of the
following:
• Checking Channel Availability Remaining time n seconds,
where n counts down from 60 to
1.
• Normal Transmit
• Radar Detected Stop Transmitting for n minutes,
where n counts down from 30 to 1.
• Idle
, only for SM/BHS, indicates module is scanning, but has not detected a beacon from an AP/BHM. Once it detects
beacon, the SM/BHS begins a Channel Availability Check on that frequency.
Regulatory Note: A PMP 450 Series AP with a Country Code set to United States will not be configurable to
another Country Code by installers or end users. This is in response to FCC KDB 594280 and ensures that end users
and professional installers will not have access to settings which could allow a radio to be configured to operate in a
manner other than that which was specified in the FCC equipment authorization grant.
Within the United States and its territories the PMP 450 Country Code is pre-configured to United States and not
selectable in the Configuration, General web page. Radios sold in regions outside of the United States and its
territories are required to set the Country Code to the region in which it is used.