Cambium PTP 450 series, User Manual

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PMP 450 Configuration and User Guide Glossary
ptp-450 (July 2014)
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After an BHM with DFS is powered on it performs a channel availability check on its main carrier frequency for 1
minute, monitoring for the radar signature without transmitting. If no radar signature is detected during this minute,
the module then proceeds to normal beacon transmit mode. If it does detect a radar signature, the frequency is
marked for a 30 minute non-occupancy period, and the module moves to its 1
st
alternate carrier frequency. The
BHM continues this behavior through its 2nd alternate frequency if needed and then waits until the first frequency
ends the 30 minute non-occupancy period. While operating, if the BHM detects a weather radar signature it marks
the current carrier frequency for a 30 minute non-occupancy period and moves to check the next-in-line carrier
frequency.
An BHS does not begin transmission until it detects a beacon from an BHM. If BHMs are not transmitting, BHSs
will be silent.
Europe applies the ETSI specification to both BHMs and BHSs, while Brazil applies it only to BHMs. In the ETSI
case, when an BHS is powered on, it scans to find a Canopy beacon from a BHM. If an BHM is found, the BHS
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 BHS proceeds through normal steps to register to
an BHM.

If the BHS does detect radar, it locks out that frequency for 30 minutes and continues scanning other
frequencies in its scan list.
After an BHS with DFS has seen a radar signature on a frequency and locked out that frequency, it may connect to a
different BHM if color codes, BHM transmitting frequencies, and BHS scanned frequencies support that connection.
To simplify operation and ensure compliance, an BHS takes on the DFS type of the BHM to which it registers. For
example, when an BHS in Europe registers to an BHM with the Country Code set to “United Kingdom”, that BHS
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 BHS 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 BHS/BHS, indicates module is scanning, but has not detected a beacon from an BHM/BHM.
Once it detects beacon, the BHS/BHS begins a Channel Availability Check on that frequency.
Regulatory Note: A PTP 450 Series BHM 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 PTP 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.