RE: Use of Dipole Antenna's For FCC-A Emissions Testing

I may be thinking of CISPR 16, but I know there is a standard that says a tuned dipole, if used vertical, must remain tuned to 80 MHz or so for measurements down to 30 MHz. To properly do this, however, requires calibration factors acquired in that mode as well. Bob Richards, NCT. Pettit,

RE: Use of Dipole Antenna's For FCC-A Emissions Testing

That is CISPR. ANSI C63.4 does not call for setting the antenna to an 80 MHz resonant length below 80 MHz. That would result in a difference in readings between the two approaches. Ghery _ From: Bob Richards [mailto:b...@toprudder.com] Sent: Monday, August 29, 2005 7:10 AM To:

RE: Use of Dipole Antenna's For FCC-A Emissions Testing

Jeff, ANSI C63.4 still lists the tuned dipole antenna as the preferred antenna for measurements from 30 MHz to 1000 MHz. Vertically polarized you must keep the antenna at least .25 meters above the ground plane, so, yes, you cannot get the center of the antenna 1 meter off the ground plane.