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The Security sub-tab sets up the band-lock feature which prevents transmitting on bands where other radios are
currently receiving on non RX safe antennas. Frequency ranges within which the band-locking occurs can be
selected freely and are not bound in any way to frequency ranges in Bands tab. Several strategies for protection
can be selected. As with other network configuration settings, all SMDs in a given installation must share the
same band-lock settings for the feature to work properly.
Adding frequency ranges
Frequency ranges within which band-locking occurs can be added simply by pressing Add button. This feature
works similarly to adding frequency ranges in the Bands tab - a minimum (inclusive) and maximum (exclusive)
frequency must be defined. Frequency ranges are sorted automatically.
Default Bands
This button provides a quick initial setup of the
frequency ranges. Bands are provided based on
the standard amateur allocations for all three ITU
regions.
Radio Protection
Using this pull-down menu, select the required
protection mechanism:
No protection
•
Band-locking is disabled.
Prevent TX
•
Upon attempt to transmit, if any other radio is detected to have its RX frequency within the same
frequency range and its RX antenna is not tagged as RX-safe (in Directions sub-tab for that antenna in
RF Boxes tab) TX will not occur and SMD will display a message for the operator.
Detach RX antenna
•
When transmission is attempted, all radios with an RX frequency within the same frequency range and a
non-RX-safe antenna, will have their receiving antenna paths disconnected. When the transmitting SMD
leaves this frequency range all other SMDs will be notified and display a message announcing this fact to
the operator.
Find safe RX antenna
•
When transmission is attempted, all other radios which have RX frequency within the same frequency
range will be switched to an antenna tagged as RX-safe.
Detach RX antenna on PTT
•
When transmission is attempted, all other radios with an RX frequency in the same frequency range and
a non-RX-safe antenna will have their receiving paths temporarily disconnected. When the transmission
ends the paths are automatically restored.
TIP: For single radio installations, create a single frequency range from the lowest to the highest
frequency used (typically 1800 – 30000 KHz). This setting will protect the RX2 input during TX.
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CONFIGURATION MANAGEMENT - Security
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