Turn on the measurement equipment and allow
sufficient time for stabilization.
Calibration. Perform the following
procedures using the calibration setup.
Set the signal generator to 10 kHz,
Increase the applied signal until
measurement receiver A indicates the current level specified in
the applicable limit is flowing in the center conductor of the
Record the "forward power" to the
injection probe indicated on measurement receiver B.
Scan the frequency band from 10 kHz
to 200 MHz and record the forward power needed to maintain the
required current amplitude.
EUT Testing. Perform the following
procedures on each cable bundle interfacing with each electrical
connector on the EUT including complete power cables (high sides and
returns). Also perform the procedures on power cables with the power
returns and chassis grounds (green wires) excluded from the cable
bundle. For connectors which include both interconnecting leads and
power, perform the procedures on the entire bundle, on the power leads
(including returns and grounds) grouped separately, and on the power
leads grouped with the returns and grounds removed.
Turn on the EUT and allow sufficient
time for stabilization.
Set the signal generator to 10
kHz with 1 kHz pulse modulation, 50% duty cycle.
Apply the forward power level
determined under 126.96.36.199b(4) to the injection probe while
monitoring the induced current.
Scan the required frequency
range in accordance with 188.8.131.52.1
III while maintaining the forward power level at the
calibration level determined under 184.108.40.206b(4), or the
maximum current level for the applicable limit, whichever is
Monitor the EUT for degradation
of performance during testing.
Whenever susceptibility is
noted, determine the threshold level in accordance with 220.127.116.11.3
and verify that it is above the applicable
For EUTs with redundant cabling
for safety critical reasons such as multiple data buses, use
simultaneous multi-cable injection