Instruction manual

Menus and Parameters
2-41
BreezeACCESS Version 4.3 System Manual
removed, including the frequencies that define the range
boundaries.
 Erase All – Erases all the entries from the list.
 Scrambling Definition – Defines the method of organizing the
selected frequencies to form the actual hopping sequence to be
used. Proper organization of the hopping sequence is essential to
guarantee minimal cross interference among several collocated
AUs that use the same sequence with different Hopping Shift
values.
 Scrambling Mode – Defines the scrambling mode. The
following options are available:
• Standard Scrambling – This mode is not recommended
for sequences with 7 or more channels. The scrambled
basic sequences for 3 to 6 frequencies when using
Standard Scrambling are:
Table 2-4: Basic Sequences using Standard Scrambling
Frequency 1 (index=1) is the lowest frequency in the list
of frequencies to be used, frequency 2 is the next
frequency and so on.
• Manual Scrambling – For customized definition of the
hopping sequence, using the Manual Sequence
Definition option (see below).
• Enhanced Scrambling – Automatically generates
hopping sequences using an enhanced algorithm. It is
recommended that Enhanced Scrambling rather then
Standard Scrambling be used. If the Enhanced
Scrambling Mode is selected, the Spanning Factor
parameter (see below) must be configured in the AU. The
Enhanced Mode is not suitable for sequences with 6 or
less frequencies. If Enhanced Scrambling is selected with
sequences that have 6 or less frequencies, than
Standard Scrambling is used by default.
The scrambled sequence is generated according to the
following rules:
a.The first channel in the basic scrambled sequence is
frequency 1 (Frequency 1 (index=1) is the lowest
frequency in the list of frequencies to be used, frequency
2 is the next frequency and so on.)
N (number of channels) Scrambled Basic Sequence (channel indexes)
3 1, 3, 2
4 1, 3, 2, 4
5 1, 3, 5, 2, 4
6 1, 3, 5, 2, 6, 4