220.127.116.11 EUT design status.
and software shall be representative of production. Software may be
supplemented with additional code that provides diagnostic capability to
18.104.22.168 Bonding of EUT.
provisions included in the design of the EUT shall be used to bond units
such as equipment case and mounting bases together, or to the ground plane.
When bonding straps are required, they shall be identical to those specified
in the installation drawings.
22.214.171.124 Shock and vibration
EUTs shall be secured to mounting bases having
shock or vibration isolators if such mounting bases are used in the
installation. The bonding straps furnished with the mounting base shall be
connected to the ground plane. When mounting bases do not have bonding
straps, bonding straps shall not be used in the test setup.
126.96.36.199 Safety grounds.
terminals, connector pins, or equipment grounding conductors are available
for safety ground connections and are used in the actual installation, they
shall be connected to the ground plane. Arrangement and length shall be in
accordance with 188.8.131.52.1.
184.108.40.206 Orientation of EUTs.
be oriented such that surfaces which produce maximum radiated emissions and
respond most readily to radiated signals face the measurement antennas.
Bench mounted EUTs shall be located 10 ±2 centimeters from the front edge of
the ground plane subject to allowances for providing adequate room for cable
arrangement as specified below.
220.127.116.11 Construction and arrangement of EUT
Electrical cable assemblies shall simulate actual
installation and usage. Shielded cables or shielded leads (including power
leads and wire grounds) within cables shall be used only if they have been
specified in installation requirements. Cables shall be checked against
installation requirements to verify proper construction techniques such as
use of twisted pairs, shielding, and shield terminations. Details on the
cable construction used for testing shall be included in the EMITP.
18.104.22.168.1 Interconnecting leads and
Individual leads shall be grouped into cables in
the same manner as in the actual installation. Total interconnecting cable
lengths in the setup shall be the same as in the actual platform
installation. If a cable is longer than 10 meters, at least 10 meters
shall be included. When cable lengths are not specified for the
installation, cables shall be sufficiently long to satisfy the conditions
specified below. At least the first 2 meters (except for cables which are
shorter in the actual installation) of each interconnecting cable
associated with each enclosure of the EUT shall be run parallel to the
front boundary of the setup. Remaining cable lengths shall be routed to
the back of the setup and shall be placed in a zig-zagged arrangement.
When the setup includes more than one cable, individual cables shall be
separated by 2 centimeters measured from their outer circumference. For
bench top setups using ground planes, the cable closest to the front
boundary shall be placed 10 centimeters from the front edge of the ground
plane. All cables shall be supported 5 centimeters above the ground
22.214.171.124.2 Input power leads.
Two meters of
input power leads (including neutrals and returns) shall be routed
parallel to the front edge of the setup in the same manner as the
interconnecting leads. Each input power lead, including neutrals and
returns, shall be connected to a LISN (see 4.3.6). Power
leads that are bundled as part of an interconnecting cable in the actual
installation shall be configured in the same fashion for the 2 meter
exposed length and then shall be separated from the bundle and routed to
the LISNs. After the 2 meter exposed length, the power leads shall be
terminated at the LISNs in as short a distance as possible. The total
length of power lead from the EUT electrical connector to the LISNs shall
not exceed 2.5 meters. All power leads shall be supported 5 centimeters
above the ground plane. If the power leads are twisted in the actual
installation, they shall be twisted up to the LISNs.
126.96.36.199 Electrical and mechanical
All electrical input and output interfaces shall
be terminated with either the actual equipment from the platform
installation or loads which simulate the electrical properties (impedance,
grounding, balance, and so forth) present in the actual installation. Signal
inputs shall be applied to all applicable electrical interfaces to exercise
EUT circuitry. EUTs with mechanical outputs shall be suitably loaded. When
variable electrical or mechanical loading is present in the actual
installation, testing shall be performed under expected worst case
conditions. When active electrical loading (such as a test set) is used,
precautions shall be taken to insure the active load meets the ambient
requirements of 4.3.4 when
connected to the setup, and that the active load does not respond to
susceptibility signals. Antenna ports on the EUT shall be terminated with
shielded, matched loads.