User's Manual

MHX-900 Operating Manual: Appendix D Modem Setup Overview 25

D. Modem Setup Overview

The required commands required to setup an MHX-900 module for point-to-point and point-to-multipoint are

summarized below. These requirements will get you started and only ensure that a link can be established, but do

not necessarily provide the best performance.

Point-to-Point

To establish a point-to-point communications link, the following commands must be issued by the host EOM

microprocessor:

n The Operating Mode S Register (S101) for one modem must be configured as a “Master - Point-to-Point”

(1), and the other as a “ Slave - Point-to-Point” (2).

n The Wireless Link Rate S Register (S103) value for both modems must be the same.

n The Network Address S Register (S104) value assigned for both modems must be the same.

n The Unit Address S Register (S105) value assigned for both modems must be the same.

n The same Hopping Pattern S Register (S106) value must be selected for both modems.

n The same Hopping Interval S Register (S109) value must be selected for both modems.

n The same Encryption Key S Register (S107) value must be selected for both modems.

The master can now attempt to synchronize with the slave using the D<slave address> command.

Point-to-Multipoint

To establish a point-to-point communications link, the following commands must be issued by the host OEM

microprocessor:

n The Operating Mode S Register (S101) for one modem must be configured as a “Point-to-Multipoint

Master ” (3), and the other as a “Point-to-Multipoint Slave” (4).