Microhard Systems MHX-920 - S Register 104 - Network Address; S Register 105 - Unit Address; S Register 106 - Primary Hopping Pattern; S Register 206 - Secondary Hopping Pattern

MHX-920 Operating Manual: Chapter 4 Configuration 25
Select a Network Address
and assign it to all units
which will be included in the
network.
Warning: Microhard Systems
strongly recommends changing the
Network Address to a value
different than the factory default
before deploying the network.
Use the same Unit Address
on both units for point-to-
point mode. In multipoint
mode, set each Slave and
Repeater to a different Unit
Address.
Valid Unit Addresses are 1
to 65535.
S Register 104 - Network Address
The Network Address defines the membership to which individual units can
be a part of. By establishing a network under a common Network Address,
the network can be isolated from any other concurrently operating network.
As well, the Network Address provides a measure of privacy and security.
Only those units which are members of the network will participate in the
communications interchange. Valid values for the Network Address range
from 0 to 65535, inclusive.
To enhance privacy and reliability of communications where multiple
networks may operate concurrently in close proximity, it is suggested that an
atypical value be chosen – perhaps something meaningful yet not easily
selected by chance or coincidence.
Default is 1.
S Register 105 - Unit Address
In point-to-point operation, the Unit Address on both the Master and Slave
(or Repeater) units must be the same. In a multipoint system, the Unit
Address uniquely identifies each Slave and Repeater from one another.
Each unit in a multipoint system must have a unique Unit Address ranging
from 1 to 65535. Do not use 0 as a Unit Address, and do not use a Unit
Address more than once within the same Network. This is required because
the Master must be able to acknowledge each unit individually, based on the
Unit Address.
S Register 106 - Primary Hopping Pattern
S Register 206 - Secondary Hopping Pattern
Since the MHX-920 is a frequency-hopping modem, the carrier frequency
changes periodically according to one of 64 pseudo-random patterns,
defined by the Primary and Secondary Hopping Patterns. Valid entries for
each are 0 through 63. Patterns 0 through 61 are pre-programmed, with
details provided in Appendix F. Patterns 58 through 63 are user-editable
patterns. See Appendix F for details.
The concept of Primary and Secondary Hopping Patterns was introduced in
the discussion of S Register 101 (Operating Mode).
Using the designations M[a,] Rx[a,b] and Sx[a] where:
- M indicates Master;
- R indicates Repeater;
- S indicates Slave;
- x is the Unit Address;
- a is the primary hopping pattern; and,
- b is the secondary hopping pattern;