Elliott PowerWave 2.4GHz Radio, Manual, Page: 10 / 135

Elliott Laboratories, Inc. -- EMC Department Test Report
Report Date: October 20, 1998
File: R28747 Page 10 of 14 pages
POWER METER
A power meter and thermister mount are used for all output power measurements from
transmitters as they provides a broadband indication of the power output. The power meter
used was the Hewlett Packard model 432A, S/N 992-05509 and the thermister mount was
the Hewlett Packard model 478A, S/N 46397.
FILTERS/ATTENUATORS
External filters and precision attenuators are often connected between the receiving antenna
or LISN and the receiver. This eliminates saturation effects and non-linear operation due to
high amplitude transient events.
ANTENNAS
A biconical antenna is used to cover the range from 30 MHz to 300 MHz and a log periodic
antenna is utilized from 300 MHz to 1000 MHz. Narrowband tuned dipole antennas are
used over the entire 30 to 1000 MHz range for precision measurements of field strength.
The antenna calibration factors are included in site factors which are programmed into the
test receivers
ANTENNA MAST AND EQUIPMENT TURNTABLE
The antennas used to measure the radiated electric field strength are mounted on a non-
conductive antenna mast equipped with a motor-drive to vary the antenna height.
ANSI C63.4 specifies that the test height above ground for table mounted devices shall be
80 centimeters. Floor mounted equipment shall be placed on the ground plane if the device
is normally used on a conductive floor or separated from the ground plane by insulating
material from 3 to 12 mm if the device is normally used on a non-conductive floor. During
radiated measurements, the EUT is positioned on a motorized turntable in conformance
with this requirement.
INSTRUMENT CALIBRATION
All test equipment is regularly checked to ensure that performance is maintained in
accordance with the manufacturer's specifications. All antennas are calibrated at regular
intervals with respect to tuned half-wave dipoles. An exhibit of this report contains the list
of test equipment used and calibration information.