User manual

Chapter Three Operation
Page 29 March 2010
3.4.1 System Generator String
The System Generator String is an alpha-numeric string of between 1 and 31 characters.
Characters can be any ASCII alpha-numeric character (except the “null” character). The WI-
MOD-9-E uses this string as an input to pseudo-random algorithms to create the following
parameters:
 A system address, which is transmitted as part of each wireless data message to differentiate
one wireless system from another,
 Encryption keys for the data encryption method selected, and
 Select a hop-set. The spread spectrum radio in the WI-MOD-9-E continually changes
frequency, or hops to different frequencies, according to a “hop-set” pattern. There are 8
different hop-set patterns available. Different hop-sets are automatically selected to
minimize any radio interference from other WI-MOD-9-E systems.
The System Generator String should be a unique data string - for example, BLUEpencil93
The same System Generator String should be entered in each module operating in the same
system.
3.4.2 Radio Encryption
Wireless data can be encrypted to provide security. If you do not require this feature, do nothing
- the default configuration is “no encryption”. The WI-MOD-9-E operation is faster without data
encryption.
If you do require this security feature, you have a choice of 64-bit proprietary encryption or 128-
bit AES encryption. AES is a superior encryption scheme accepted by most users as one of the
most secure encryption schemes available. For users who prefer not to use a “public-domain”
encryption scheme, a proprietary scheme is available. Both encryption methods provide an
extremely high level of security of the wireless data.
3.5 Network Configuration
After configuring the Quick Start page, you can view or modify Ethernet network parameters by
selecting the “Network” menu. When prompted for username and password, enter “user” as the
username, and the previously configured password in the password field.
If IP address or password has been forgotten, the Factory Default switch may be used to access
the existing configuration. Refer to section 3.3 above.
After the addresses are configured, it is important to save the configuration by selecting “Save
and Reboot”.