ETS-Lindgren 7606 Coil Antenna/Shielded Coil - Manual (Page 34)

5. Reposition the Model 7605 successively to a location in each 30 cm by
30 cm area on each surface of the EUT and repeat the previous steps.
6. From the total set of data where susceptibility was noticed, select three
frequencies in each octave of the frequency range from 30 Hz to
100 kHz where susceptibility was found.
T ESTING THE EUT
At each frequency determined as a result of selecting test frequencies, apply the
current to the Model 7605 that corresponds to the applicable limit in
MIL-STD-461D. For accuracy in this process, calculate the required loop current
using equation 10. Move the loop to search for all possible locations of
susceptibility, including cables, connectors, cabinet seams, vents, and so on.
E QUATION 10
Model 7606 Calibration Calculations
The Model 7606 is designed to conform to MIL-STD-462D. This sensor is
electrically very small, which permits performance calculation based on
geometry. In the table on page 21 the performance is shown in the form of a
conversion factor which is used to convert the output voltage, in dB(µV), to the
magnetic flux density, in dB(pT), of the field in which the coil is immersed.
The tolerances in manufacturing are a maximum of 0.05 mm (0.002 inches).
These tolerances in worst-case combination cause a maximum error of ±0.06 dB.
The best accuracy with which the conversion factor can be measured is ±1 dB,
and larger errors are probable. Therefore, the conversion factor is not measured,
but is instead calculated to provide the best possible accuracy (absolute error
≤0.06 dB).
34 | MIL-STD-462D Method RS101 Testing