MIL-PRF-62546C
2 MHz - 12 GHz
Nonsheltered
2 MHz - 29.9 MHz
5 V/m
30 MHz - 299 MHz
10 V/m
300 MHz - 1999 MHz
10 V/m
2000 MHz - 12.4 GHz
5 V/m
In addition, the Narrowband Conducted Emissions shall be in accordance with the limits of
figure 9.
3.4 Interface requirements (see 4.3.4).
3.4.1 Electrical interface. Electrical interface shall be provided through the use of a
connector conforming to the interface and envelope dimensions of Drawing 12343265-1. Pin
assignments shall be as specified in table III.
TABLE III. OFSA connector pin definition index.
PIN
Function
In/Out
A
POWER
IN
B
RETURN
IN/OUT
C
LARGE FIRE SIGNAL
OUT
D
SMALL FIRE SIGNAL
OUT
E
BUILT IN TEST
IN
F
CODE PIN F
G
CODE PIN G
H
UNUSED
3.4.2 Configuration. The OFSA shall conform to the interface and envelope dimensions
of Drawing 12370458.
3.4.3 Vehicle armor type coding. The OFSA shall be capable of operating in either a
steel or an aluminum armored vehicle. The vehicle wiring harness will provide coded
information as to which type of armor by way of two connector pins at each OFSA. Pins F and
G (see table III) will be connected within the harness for aluminum armored vehicles and will
not be used for steel armored vehicles. This coded information may be used by the OFSA
manufacturer to modify sensor logic for steel or aluminum applications. If the OFSA logic is
independent of armor type, the two code pins shall not be used.
3.5 Ownership and support requirements (4.3.5).
3.5.1 Reliability. The OFSA shall have not less than 100 000 operating hours between
failures. A failure shall be defined as any OFSA malfunction which prevents the component
from responding as specified.
3.5.2 Dissimilar metals. Dissimilar metals shall not be used in intimate contact without
protection from galvanic corrosion.
8
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