Specifications

EMC-CS-2009.1

February 11, 2010

A.3 Antenna Method

Figure A-6 illustrates the setup when using a receiving antenna for field characterization. This method may be used when

using either CW or pulsed amplifiers. This method requires use of any of the following as the receive antenna:

• ETS Lindgren DRG 3115

• Antenna Research: DRG 118/A

• Rohde & Schwarz: HF906

Use of alternative antennas shall be approved by the FMC EMC group. Additional requirements include:

• The phase center of the antenna is positioned 125 mm above the surface of the dielectric support used during actual

testing.

• Peak forward power shall be the reference parameter for characterization of the field. This forward power shall be

measured using either a peak envelope power (PEP) sensor (preferred method) or a spectrum analyzer.

A list of

recommended power meters/sensors may be found at http://www.fordemc.com

. If a spectrum analyzer is used, it

shall be tuned to each individual frequency using zero span setting with a measurement bandwidth greater than 3

MHz.

• Pulse modulation characteristics shall conform to that illustrated in Figure C-4. The maximum RMS forward power

(

Ppulse) used for pulsed modulation testing shall be the same as the CW calibration power (P

CW_CAL

) (i.e. P

PULSE

CW_CAL

• Characterization shall be performed using the required field strengths in Table 11-3. Characterization at lower

field strengths with subsequent power scaling for higher filed strengths is not permitted.