User's Manual

Flexible Hopping Definition Mode
Frequencies Selection and Basic
Sequence Generation Using the Flexible
Hopping Definition Menu
The Flexible Hopping Definition menu includes the following options:
Define Sub-Bands
The Define Sub-Bands option enables defining a new list of sub-bands
and/or discrete frequencies. Enter a list of the required sub-bands
and/or frequencies, using either sub-bands (f1-f2) or discrete
frequencies, e.g. 904-910,915,919-925. use a comma to separate
between entries, do not use spaces.
The usable center frequencies are from 904 to 926, using a 1 MHz
resolution (904, 905, 906,…926). However, the channel spacing, which
is the minimum distance between two consecutive frequencies, is
2 MHz. Thus, for example, the sequence 904,905 is not a valid entry
because the distance between frequencies is less than 2 MHz, and it will
be rejected.
When entering discrete frequencies, the actual center frequencies are
defined. When entering a sub-ban, a guard band of 1 MHz on both sides
is included, which means that the sub-band entries can start at 903
and end at 927. Defining for example the sub-band 903-909 will result
in selecting the frequencies 904, 906, 908. The same set of frequencies
(904, 906, 908) will be selected also if the defined sub band is 903-910.
Defining the sequence 904-910,915,919-927 will result in selecting the
frequencies 905, 907, 909, 915, 920, 922, 924 and 926.
The new selected set of frequencies (frequencies to be used) will become
effective only after the next reset.
Scrambling Definition
The Scrambling Definition menu enables defining 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 neighboring cells
that use the same sequence with different Hopping Shift values.
Scrambling Mode
Manual Revision
D-3
Defines the scrambling mode. The following options are available: