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MIL-F-18327 Filters; High Pass, Low Pass, Band Pass, Band Suppression, And Dual Functioning, General Specification ForThis specification covers the general requirements for passive frequency-selective networks, such as dual functioning, band suppression, band pass, low pass, and high pass \(or any combination thereof\) electric-wave filters, including those employing electromechanical and piezoelectric elements, for use over the frequency range of 0 to 500 megahertz. Filters covered by this specification are intended for use where operation under various environmental conditions is required. This specification covers filters weighing not more than 50 pounds and requiring root-mean-square test voltage ratings not greater than 5,000 volts.

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MIL-F-18327F
4.7.12 Vibration (see 3.15). Filters shall be tested in accordance with 4.7.12.1 or 4.7.12.2, as specified (see 3.1).
4.7.12.1 Vibration (grades 4 and 5). Filters shall be tested in accordance with method 201, MIL-STD-202. The
following details shall apply:
a.
Tests and measurements prior to vibration: Not applicable.
b.
Method of mounting: Filters shall be rigidly mounted by their normal mounting means.
c.
Electrical load as specified (see 3.1).
d.
Tests and measurements after vibration: Dielectric withstanding voltage and electrical characteristics shall
be measured as specified in 4.7.6 and 4.7.8, respectively. Filters shall then be examined for evidence of
leakage and physical damage.
4.7.12.2 Vibration, high frequency (grades 6, 7, 8, and 9). Filters shall be tested in accordance with method 204,
MIL-STD-202. The following details shall apply:
a.
Method of mounting: Filters shall be rigidly mounted by their normal mounting means.
Electrical load: As specified (see 3.1).
b.
c.
Test condition letter:
(1)
A: For grades 8 and 9.
(2)
B: For grades 6 and 7.
d.
Measurements after test: Dielectric withstanding voltage and electrical characteristics shall be measured
as specified in 4.7.6 and 4.7.8, respectively. Filters shall then be examined for evidence of leakage and
physical damage.
4.7.13 Shock (see 3.16). Filters shall be tested in accordance with 4.7.13.1 or 4.7.13.2, as specified (see 3.1).
4.7.13.1 Shock (specified pulse). Filters shall be tested in accordance with method 213, MIL-STD-202. The
following details and exceptions shall apply:
a.
Mounting: By normal means.
b.
Test condition letter: I.
c.
Measurements after shock: Dielectric withstanding voltage and electrical characteristics shall be measured
as specified in 4.7.6 and 4.7.8, respectively. Filters shall then be examined for evidence of leakage and
physical damage.
4.7.13.2 High-impact shock (when specified, see 3.1). Filters shall be tested in accordance with method 207, MIL-
STD-202. The following details shall apply:
a.
Mounting fixture: Figure 207-5 of method 207.
b.
Measurements after test: Dielectric withstanding voltage and electrical characteristics shall be measured
as specified in 4.7.6 and 4.7.8, respectively. Filters shall then be examined for evidence of leakage and
physical damage.
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