MIL-DTL-28781E
C1g
1
C13
C14
C12
4
3
C34
C4g
C3g
C24
C23
2
C2g
FIGURE 1. Test method for determining capacitance unbalance of pair-to-pair.
4.6.3.2 Pair-to-shield capacitance unbalance. On figure 2, S indicates all wires (except conductors 1
and 2) bunched together. Wires 1 and 2 have a direct capacitance between them as well as a direct
capacitance to the shield. Wires 1 and 2 also have direct capacitance to S, and S has a direct
capacitance to the shield.
CSg
S
1
2
C2g
C1g
SHIELD
FIGURE 2. Test method for determining capacitance unbalance of pair-to-shield.
The pair-to-shield direct capacitance unbalance for pair 1-2 is C1g C2g. The measurement of this
difference shall be made in such a way that the measured value is not appreciably affected by the direct
capacitances of wires 1 and 2 to other wires. A schematic of a form of measuring bridge often used to
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