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MIL-R-23016(Wep)
is the impulse noise bandwidth of the instrument in kc.
3.2.9.15.4.10 Radio Receiver Front-end Rejection:
Front-end
rejection is the measured capability of a receiver,
in decibels, in rejecting signals at the antenna
expressed
terminals
that are outside the channel, or frequency, to
which the
receiver is tuned.
Open Space:
3.2.9.15.4.11
The term "open space," as used in this specification, is
intended to designate an ideal site for radiated interference
measurements.  This ideal site should be open, flat terrain
at a considerable distance (100 feet or more) from buildings,
electric powerlines, fences, trees, underground cables, and
pipe lines.  This site should have a sufficiently low ambient
level of radiated interference to permit testing to the govern-
ing radiated interference limit at any test frequency selected.
3.2.9.15.5 Standard Antennas:
Because of the nonuniformity of the electromagnetic field which
usually exists close to a test sample, it is imperative that
tests for radiated interference be conducted with antennas
identical to those specified.  Attempts to correlate results
obtained with other antennas by reducing the results to micro-
volt per meter, based upon plane wave calculations and antenna
effective height, may be erroneous and will not be accepted as
indicating compliance with this specification.
Operator and Observer Positions:
3.2.9.15.6
In those cases where the operator's or observer's location seems
to vary a measurement reading, a minimum distance of 3 feet
should be maintained between his body and the antenna; the
operator should change position slightly until a maximum reading
is obtained.  In all cases, as few observers as possible should
be present in the screen room during the radiated measurements.
3.2.9.15.7 Impulse Generators:
Satisfactory impulse generators can be obtained from Empire
79

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