User's Manual
Appendix B. Basic Parameters
BreezeACCESS Series 41 Base Station Equipment Installation Manual
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Flexible Hopping Definition
– Allows defining the sub-bands to be used;
displays the selected sub-bands, the hopping frequencies that will be used as
a result of these selections and the current hopping sequence (based on the
previous selections made before the last Reset). The new settings will go into
effect only after the next Reset.
Note:
The algorithm that determines the operational hopping sequence (the
actual hopping sequence based on rearranging the order of the
selected hopping frequencies) when using Flexible Hopping Definition
is different than the one used when fixed Hopping Bands are selected,
even when the selected set of hopping frequencies is the same.
Therefore, all units in the same base station (all AUs and associated
SUs) must use the same hopping frequencies selection method (fixed
Hopping Band or Flexible Hopping Definition).
The Flexible Hopping mode is intended primarily for use in cases where the
operating band cannot be defined by the Hopping Band and Frequency Offset
parameters. This includes the following instances:
⇒
When the bandwidth of the operating band is different from the standard
bands available in the Hopping Band menu.
⇒
When the operating band is comprised of two or more non-continuous
bands.
⇒
When the required Channel Spacing is other than 2MHz.
The Flexible Hopping menu includes the following options:
⇒
Channel Spacing
– Allows defining a new value for the Channel
Spacing parameter, if the unit supports selection between several channel
spacing values. Some models may support only a single value for the
Channel Spacing parameter, in which case this parameter is not available.
The Channel Spacing parameter defines the minimum distance between
consecutive hopping frequencies. In addition, the Channel Spacing
parameter also determines the guard band, which is the distance of the
first hopping frequency in each sub-band from the beginning of the sub-
band, as well as the minimum distance of the last hopping frequency in
each sub-band from the end of the sub-band.