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6193-3201
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
RM-90 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 differ-
entiate one wireless system from another,
… Encryption keys for the data encryption method selected, and
… Select a hop-set. The spread spectrum radio in the RM-90 continually changes frequen-
cy, or hops to different frequencies, according to a “hop-set” pattern. There are 8 differ-
ent hop-set patterns available. Different hop-sets are automatically selected to minimize
any radio interference from other RM-90 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 RM-90 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.
