S9407-AB-HBK-010 Datasheet, PDF (131/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
6.8.2
Procedure 2 - Determining Cable-to-Cable Spacing and Shielding for
Radiators Versus Susceptors in Susceptor Categories S3 and R4 Through
R8
STEP NO.
1
2
3
4
DETERMINE THE
FOLLOWING
VALUES
Radiator category
Radiator group number
Susceptor category
Susceptor group number
Spacing requirement without
shielding
Spacing restriction (Available
spacing is adequate or
inadequate)
5
20 dB conduit shielding
effectiveness S(dB)
(minimum value)
INFORMATION SOURCE OR
INSTRUCTION
Table 6-1.
Figures 6-1, 6-2, or 6-3.
Table 6-1.
Figures 6-2, or 6-4
Figure 6-6. Intersection of coordinates
determined in steps 1 and 2.
If step 4 is equal to or greater than
required spacing in step 3, available
spacing is adequate; no shielding is
required.
If step 4 is less than required spacing in
step 3, available spacing is inadequate;
20 dB of shielding of susceptor is
required.
With 20 dB of shielding (minimum value),
zero inches spacing is permissible. (See
paragraph 6-7.)
Figure 6-7. 20 dB (minimum value) at
lowest frequency in passband of
equipment connected to susceptible
cable.
6-18