ANSI C634:2016 pdf download. Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9kHz to 40GHz.
. ambient level:
The value of unwanted radiated and conducted emissions existing at a specific test location and time when the test sample is not activated.
. antenna factor:
A factor that when multiplied with the linear voltage reading of the measuring instrument yields the electric field strength in volts/meter or the magnetic field strength in amperes per meter.
. floor-standing equipment:
Equipment designed to be used directly in contact with the floor, or supported above the floor on a surface designed to support both the equipment and the operator.
. tabletop device:
A device designed to be placed and
normally operated on the raised surface of
a table, e.g., most personal computers.
. equipment arrangement:
An equipment configuration spacially arranged with cables at the test site to form an equipment under test (EUT) (also known as “test setup”).
. equipment configuration:
A combination of equipment units constituting the equipment under test
(EUT).
. incidental radiator:
A device that produces RF energy during the course of its operation, although the device is not intentionally designed to generate or emit RF energy. Examples of incidental radiators are dc motors, mechanical light switches, and so on.
. intentional radiator:
A device that intentionally generates and emits RF energy by radiation or induction.
. reference groundplane:
A conducting flat suriace or plate that is used as a common reference point for circuit returns and electric or signal potentials and that reflects electromagnetic waves.
• site attenuation:
The ratio of the power input of a matched, balanced, lossless, tuned dipole radiator to that at the output of a similarly matched, balanced, lossless, tuned dipole receiving antenna for specified polarization, separation, and heights above a flat electromagnetically reflecting surface. It is a measure of the transmission path loss between two antennas.
Receiver standards
Measurement instrumentations used for making radiated and ac powerline conducted radio noise measurements include those which conform to the specifications contained in either:
a) ANSI C63.2-1 996, or
b) CISPR 16-1-1 (2003-11).
The reference receiver for measurements of radiated and ac powerline conducted radio noise is an instrument conforming to ANSI 063.2-1 996 or CISPR 16-1-1(2003-11). Other instruments may be used for certain restricted and specialized measurements when data so measured are correlated to a device conforming to ANSI 063.2-1996 or CISPR 16-1-1(2003-11).
Measurement ins truinentation
Spectrum analyzer
spectrum analyzers shall be equipped with proper quasi-peak detection for measurements below I GHz as the reference detector.ANSI C634 pdf download.