User's Manual

ARES/ATHENA
Solutions for a Real Time World User Manual
RE-TEK-1890 8 45388 Warm Springs Blvd. Fremont, CA 94539
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Copyright Unigen Corporation, 2009
Antenna Interconnect & Impedance
Unigen has pre-qualified antennas that integrate the connectors, transmission line and the antenna.
UGWSX933SM0033U requires the use of a ½ wavelength dipole, 902-928MHz frequency range, with
a VSWR no greater than 2.0 and having a maximum output no greater than +2dBi The transmission
line must be designed to be 50-Ohm impedance.
Physical Implementation
The physical implementation of the RF transmission line must conform to the following
guidelines:
• Coaxial Cable: A coaxial of varying length may be used providing the impedance
measures 50 +/- 2 ohms and is non-radiating. Best practice RF engineering suggests
the cable should be kept to the minimum length required to satisfy the application.
Excessive cable and interconnect loss may adversely effect the effective transmission
and reception range of the end product.
Emissions Compliance Testing
Notwithstanding the Modular Approval for the Radio Device with associated antenna, the end
product configuration must meet digital emissions compliance and must be tested in
accordance with FCC Part 15 requirements confirming radiated emissions are within specified
limits.
Applicable sections include:
 Part 15 Section 15.109 Sub-paragraph A, Class B Radiated Emission Limits
These emissions tests can be conducted by the manufacturer or by contacting an approved
test facility equipped and certified accordingly. The results of these emissions tests are not
required to be submitted to the FCC or Unigen, but should be kept on file by the OEM.
Co-location of Additional Transmitters
Digital Electronic Devices manufacturers using this MA grant should refer to Appendix B (FCC
Grant #) for end-products using two or more co-located RF transmitters. This grant states:
“This modular transmitter is approved for use in Digital Electronic Devices and
may operate in conjunction with other mobile and portable transmitters in the
same device; provided, the other mobile and portable transmitters have
satisfied the appropriate RF exposure requirements contained in the FCC
rules. The grantee must also provide Digital Electronic Device integrators, or
end users if marketed directly to end users, with installation and operating
instructions for satisfying RF exposure requirements. The Grantee must