User's Manual

05-3946A01, Rev. C TransNET OEM Integration Guide 63
2) A unique Network Address—This provides a unique identifier for each
radio in a network. A radio is not addressable unless this unique code is
included in the data string.
3) An optional encryption value (code)—Setting an encryption code
requires the use of the
CODE command. This command scrambles the
radio’s hop pattern and encrypts payload data content. A radio requires
the correct Network Address (
ADDR ) and CODE value in order to
synchronize.
When the CODE command is used, the same value must
be programmed into all radios in the network. See “CODE [NONE,
1…255]” on Page 42 for more details.

The effective combination of CODE and ADDR discourage the use of an
exhaustive search to gain access to a system.
The items described above provide sufficient security for most systems. For
highly-sensitive applications, system designers should consider employing
application level encryption into their polling protocols to further protect their
systems. Third party software tools are available for adding encryption, and
these should be considered as part of any advanced encryption scheme.
12.0 TECHNICAL REFERENCE
12.1 Product Specifications—900 MHz
GENERAL
Frequency Hopping Range: 902–928 MHz,
Subdivided into eight 3.2 MHz zones
Hop Pattern: Based on network address
Frequency Stability: ±1.5 ppm
Half-Duplex Operation: ±1.6 MHz TX/RX split
Network Addresses: 65,000
Temperature Range: –40° C to +70° C
Humidity: <95% at +40° C; non-condensing
Primary Power: 13.8 Vdc (6–30 Vdc range)
Current Draw (typical):
Transmit: 510 mA @ 13.8 Vdc
Receive: <115 mA @ 13.8 Vdc
Sleep Mode: ð 3 mA @ 13.8 Vdc
Physical Dimensions: 1.81˝ W x 3.45˝ L x 0.63˝ H
(46 x 87.5 x 16 mm)
Agency Approvals: • FCC Part 15.247 
(E5MDS-EL806)
• FCC Limited Modular Approval
• Industry Canada RSS-210 and RSS-139 
(CAN 3738A-MDSEL806)